Effect of Addition of Glucose or Fructose in Three Types of Crystalloid Fluid on Spermatozoa Quality of Gaga’ Chicken from South Sulawesi, Indonesia

Khaeruddin1,2, Gatot Ciptadi1, Muhammad Yusuf3, Hermawansyah2, Sahiruddin3 and Sri Wahjuningsih1*

1Department of Animal Science, Faculty of Animal Husbandry, Universitas Brawijaya, Jl. Veteran, Malang 65145, East Java, Indonesia.

2Program of Animal Science, Faculty of Agriculture, Universitas Muhammadiyah Sinjai, Jl. Teuku Umar No. 8, Sinjai 92611, South Sulawesi, Indonesia.

3Livestock Reproduction Laboratory, Faculty of Animal Science, Universitas Hasanuddin Jl. Perintis Kemerdekaan KM 10 Makassar 90245, Indonesia.

ABSTRACT

Gaga’s chicken is a genetic resource of Indonesian livestock which must be protected and preserved. The increase in the gaga chicken population can be made by artificial insemination techniques and diluents are important factors in determining the quality of chicken spermatozoa. The aim of this study was to determine the effect of the use of three types of crystallized liquids and two types of monosaccharides on the quality of Gaga chicken spermatozoa. This study used a completely randomized design with a factorial pattern with the first factor being the type of crystalloid liquid (Ringer’s lactate, Ringer’s acetate, and KA-EN 3B) supplemented with egg yolk and the second factor being the addition of sugar (control, glucose, and fructose). The semen was diluted at a ratio of 1:10 and stored at 5 ºC for 48 h. The results showed that the type of diluent treatment affected abnormal morphology, progressive motility, local motility, total motility, immotil, linearity and straightness. In general, Ringer’s acetate-yolk glucose diluent is better in maintaining the quality of Gaga’s chicken spermatozoa during storage.

Article Information

Received 28 November 2021

Revised 29 January 2023

Accepted 17 February 2023

Available online 08 May 2023

(early access)

Published 26 August 2024

Authors’ Contribution

Khaeruddin presented the concept. SW and Khaeruddin peformed visualization and wrote, reviewed and edited the manuscript. GC, Khaeruddin, MY, SW and Sahiruddin planned methodology. Khaeruddin, Hermawansyah and Sahiruddin performed formal analysis.

Key words

Gaga chicken, Sperm, Diluents, Crystalloid fluids, Sugar

DOI: https://dx.doi.org/10.17582/journal.pjz/20211128011130

* Corresponding author: yuning@ub.ac.id

0030-9923/2024/0005-2441 $ 9.00/0

Copyright 2024 by the authors. Licensee Zoological Society of Pakistan.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

INTRODUCTION

Indonesia has various types of native chickens which require serious attention to preserve and improve the genetic quality. Ketawa, also known as Gaga, is an example of a native chicken from South Sulawesi Province, Indonesia, and is popular among hobbyists due to its unique voice, which is slow and dangdut-like (Bugiwati and Ashari, 2013). Based on the Minister of Agriculture decree No. 2920/Kpts/OT.140/6/2011, the Gaga chicken is a wealth of Indonesian livestock genetic resources that need to be protected and preserved. Therefore, there is a need to increase its population and preservation as the original Indonesian chicken germplasm.

The population of Gaga chickens is increased by improving maintenance management, including mating using artificial insemination which increases the population of poultry rapidly compared to the natural type because males are used to mate with more females. Meanwhile, diluents are used to raise the volume of semen, thereby increasing the mating ratio. The diluent must contain similar components in seminal plasma, be isotonic, non-toxic and able to maintain the quality of spermatozoa during storage. Therefore, crystalloid liquids are practically used as a chicken semen diluent because it is isotonic and easily available at the nearest pharmacy.

A crystalloid fluid is an aqueous solution of mineral salts and other small, water-soluble molecules. Most commercially available crystalloid solutions are isotonic to human plasma, this means that the fluids correspond to the concentrations of various solutes present in the plasma (Epstein and Waseem, 2021). Some examples that are commercially available in Indonesia include ringers lactate, ringers acetate, and KA-EN 3B® which contain minerals such as sodium and potassium chloride. Zhaowang and Mengzhou (2008) stated that inorganic salts namely sodium chloride and potassium chloride were, respectively used under the osmotic pressure of 350 mmol/L, consequently, the survival time and index of sperms were both higher. The use of ringers lactate as a diluent has been intensively applied to various studies on local chickens in Indonesia (Telnoni et al., 2021; Khaeruddin and Hastuti, 2020; Khaeruddin and Amir, 2019; Iswati et al., 2018; Telnoni et al., 2017; Junaedi et al., 2017). However, other crystalloid liquids such as ringer’s acetate and KA-EN 3B® have not been tested as a semen diluent, even though this liquid has a greater potential compared to ringer’s lactate.

The presence of simple sugars in a diluent is needed as an energy source for spermatozoa. Meanwhile, glucose and fructose have been extensively studied in mammalian semen as an energy source. The addition of glucose increased motion characteristics of stallion sperm during long-term storage (5 days) (Hernández-Avilés et al., 2021), while spermatozoa obtained from bull epididymis and cryopreserved use fructose as an optimal energy source to reduce the loss of viability and motility (Pappa et al., 2019). Furthermore, the single composition extenders of glucose, sucrose, and fructose all function appropriately to protect the integrity of chicken sperms (Zhaowang and Mengzhou, 2008). Data on the addition of sugars to diluents and the effect on the quality of chicken spermatozoa is still lacking. Therefore, this study aims to determine the effect of using three types of crystalloid liquids and two types of monosaccharides on the quality of Gaga chicken spermatozoa at cooled storage.

MATERIALS AND METHODS

Collection and evaluation of the fresh semen

Five Gaga chickens aged approximately 10 months old were used in this study after being kept in individual cages measuring 40 x 50 x 70 cm3, and fed daily with 150 grams as well as water ad libitum. Semen collection was performed in the morning from 7:30 am using a massage technique based on Stelzer et al. (2005). Semen was obtained by placing the left hand on the back of the chicken and massaging around the cloaca with two fingers until the papilla protruded. This protrusion of the papilla was followed by the ejaculation of fresh semen. The semen was collected using a tuberculin syringe and brought to the laboratory for macroscopic (volume, color, viscosity, and pH) and microscopic evaluation.

Sperm concentration was calculated in the Neubaeur chamber under a microscope with a magnification of 160 x (Boeco, Germany). The mass movement was evaluated with a fresh semen drop object observed under a microscope with a magnification of 160 x. evaluation of individual motility was carried out subjectively on diluted semen under a microscope magnification of 640x. Eosin-nigrosine stain (Merck, KgaA, Darmstadt Germany) was used to evaluate the viability and the percentage of abnormal morphology. A drop of semen was mixed with a drop of eosin-nigrosine then rubbed on a glass slide and then warmed on a heating table for 5 seconds. Approximately 200 spermatozoa were observed with a microscope which has 640x magnification for viability calculation by counting the color and non-color-absorbing samples, followed by calculating the abnormal morphology of viable spermatozoa.

Diluent preparation

Three types of crystalloid solutions were used as basic diluents, namely ringer’s lactate, ringer’s acetate, and Ka-EN 3B®. Ringer’s lactate (PT. Widatra Bakti, Indonesia) contained 1.55 g of sodium lactate, 3 g of sodium chloride, 0.15 g potassium chloride, and 0.1 g of calcium chloride in 500 mL sterile water, with osmolarity 274 mOsm L-1. KA-EN 3B® (PT. Otsuka, Indonesia) which contained anhydrous dextrose 13.5 g, sodium chloride 0.875 g, potassium chloride 0.75 g, sodium lactate 1.1 g in 500 mL sterile water, with osmolarity 290 mOsm L-1. Ringer’s acetate (Asering®, PT. Otsuka, Indonesia) contained 1.9 g sodium acetate, 3 g sodium chloride, 0.15 potassium chloride, and 0.1 g calcium chloride in 500 mL sterile water, with osmolarity 273 mOsm L-1. The basic diluent was added with 9% chicken egg yolk and centrifuged at 2000 rpm for 30 minutes, then the supernatant was collected and added with penicillin 1000 IU mL-1 (PT. Meiji, Indonesia) and 1 mg mL-1 streptomycin (PT. Meiji, Indonesia).

Nine tubes were filled with different extenders. The first tube was filled with ringer’s lactate + egg yolk (RLY), the second tube was filled with RLY + glucose 2% (w/v) (Merck, KgaA, Darmstadt Germany), the third tube was filled with RLY + fructose 2% (Merck, KgaA, Darmstadt Germany), the fourth tube was filled with ringer’s acetate + egg yolk (RAY), the fifth tube was filled with RAY + glucose 2% (w/v), the sixth tube was filled with RAY + fructose 2% (w/v), the seventh tube was filled with KA-EN 3B® + egg yolk (K3Y), the eighth tube was filled with K3Y + glucose 2% (w/v), and the ninth tube was filled with with K3Y + fructose 2% (w/v).

Dilution, storage and evaluation

The semen was diluted in a ratio of 1:10, stored at 5oC for 48 h, and then evaluated for viability and abnormal morphology of the spermatozoa by eosin-nigrosine staining. Furthermore, the motility and kinematic parameters were monitored using a computer-assisted sperm analysis system (CASA, Sperm Vision, Minitube, Tiefenbach, Germany), connected to a trinocular light microscope (Zeiss AXIO Scope A1, US). The sperm motility parameters include total motility, progressive motility, local motility and immotile. Sperm kinematic parameters inclue distance curve-line (DCL), distance straight-line (DSL) dan distance average path (DAP), velocity curve linear (VCL), velocity average pathway (VAP), velocity straight line (VSL), linearity (LIN), straightness (STR), wobble (WOB), beat cross frequency (BCF), amplitude lateral head (ALH) dan average orientation dan change of head (AOC).

Statistical analysis

Statistical analysis for multiple comparisons was performed using a completely randomized design with factorial pattern with nine treatment combinations and five replications. viability, abnormal morphology, motility parameters and kinematic parameters after storage were analyzed using ANOVA, if the f-value is significant (p <0.05) then it was followed by duncan multiple range test. statistical analysis used spss 16 applications on windows.

RESULTS

Characteristics of fresh semen

The fresh semen examination results showed that the volume was relatively low, namely 0.18 ml with milky color, and a pH of 7.54. The concentration of spermatozoa was relatively low, namely 1.937 billion ml-1, motility 78%, viability 99.13%, and abnormal morphology of 7.44% (Table I).

 

Table I. The average of fresh semen characteristics of Gaga chicken.

Parameter	Mean ± SEM
Volume (ml) Color Consistency pH Sperm concentration (x106/mL) Movement of sperm mass Motility (%) Viability (%) Abnormal morphology (%)	0.18±0.05 Milky Thick 7.54±0.42 1937±230.14 ++ 78±2.00 99.13±0.5 7.44±0.87

 

Sperm viability after storage

Moreover, the viability of spermatozoa after 24 and 48 h storage did not differ between the treatments (P>0.05) as indicated by values ranging from 96.78-98.72% and 95.87-97.76%, respectively (Table II).

 

Table II. Viability of Gaga chicken sperm at 24 and 48 h of cold storage that dilution with with ringer lactate-yolk, ringer acetate-yolk, and KA-EN 3B-yolk added with glucose or fructose.

Semen sample	Viability (%)
	24 h storage	48 h storage
Ringer lactate-yolk No sugar Glucose Fructose Ringer acetate-yolk No sugar Glucose Fructose KA-EN 3B-yolk No Sugar Glucose Fructose SEM Effects Crystaloid extender Sugar Extender x sugar	97.60 98.72 97.61 97.22 97.02 97.86 97.33 96.78 97.88 0.208 0.374 0.724 0.417	96.80 97.20 97.20 96.79 96.92 97.76 97.29 95.87 95.98 0.305 0.531 0.893 0.725

 

Sperm abnormal morphology after storage

The diluent treatment significantly affected (P<0.05) the abnormal morphology of spermatozoa at 24 and 48-h storage (Table III), as well as the interaction between the type of crystalloid diluent and the type of sugar. The use of KA-EN 3B®-yolk diluent produced lower abnormal morphology compared to ringer’s acetate-yolk and ringer’s lactate-yolk diluents, while the addition of glucose and fructose generally reduced the abnormal morphology of the sperm. At 24 h of storage, the lowest morphological abnormalities (11.39-18.65%) were found in the treatment with ringer’s lactate-yolk glucose, ringers acetate-yolk glucose, ringer’s lactate-yolk fructose, KA-EN 3B®-yolk diluent, while at 48 h, abnormal morphology increased with the lowest number ranging from 16.70-22.87% in ringer’sa acetate-yolk glucose, ringer’sa acetate-yolk fructose, and KA-EN 3B®-yolk diluent with or without sugar.

Sperm motility after storage

The type of sugar treatment had a significant effect (P<0.05) on all parameters of sperm motility except local motility, while the type of diluent crystalloid had no effect (P>0.05) (Table IV). The interaction between the type of crystalloid diluent and sugar affected (P<0.05) on all motility parameters. The highest total motility was found in the ringer acetate-yolk with glucose (76.18%), while the lowest (45.58-54.38%) was found in the ringers lactate-yolk diluent without sugar, and KA-EN 3B-yolk glucose.

 

Table III. Abnormal morphology of Gaga chicken sperm at 24 and 48 h of cold storage that dilution with ringer lactate-yolk, ringer acetate-yolk, and KA-EN 3B-yolk added with glucose or fructose.

Semen sample	Abnormal morphology (%)
	24 h storage	48 h storage
Ringer lactate-yolk No sugar Glucose Fructose Ringer acetate-yolk No sugar Glucose Fructose KA-EN 3B-yolk No sugar Glucose Fructose SEM Effects Crystaloid extender Sugar Extender x sugar	47.07a 18.65c 28.05b 28.55b 11.39c 12.92c 17.54c 11.96c 16.17c 0.811 0.000 0.000 0.000	61.71a 28.99cd 31.13c 38.54b 17.25e 21.28e 22.87de 16.70e 19.94e 0.848 0.000 0.000 0.000

 

Note: Different superscripts in the same column show significant differences (P <0.05).

 

Table IV. Motility parameters of Gaga chicken sperm at 48 h of cold storage that dilution with with ringer lactate-yolk, ringer acetate-yolk, and KA-EN 3B-yolk added with glucose or fructose.

Semen sample	Variable of motility (%)
	Total motility	Progressive	Local	Immotil
Ringer lactate-yolk No sugar Glucose Fructose Ringer acetate-yolk No sugar Glucose Fructose KA-EN 3B-yolk No Sugar Glucose Fructose SEM Effects Crystaloid extender Sugar Extender x sugar	53.60ab 63.52bcd 59.98bcd 45.58a 76.18e 66.26d 64.96cd 54.38abc 64.76cd 1.153 0.435 0.002 0.000	33.62ab 34.40ab 40.50abcd 30.88a 52.52d 47.16cd 39.30abc 36.84abc 44.52bcd 1.313 0.087 0.017 0.042	20.00abc 29.08d 19.48abc 14.68a 23.64bcd 19.10ab 25.66cd 17.54ab 20.26abc 0.673 0.93 0.55 0.00	46.40de 36.48bcd 40.02bcd 54.42e 23.82a 33.76b 35.04bc 45.62cde 35.24bc 1.153 0.436 0.002 0.000

 

Note: Different superscripts in the same column show significant differences (P <0.05).

 

Furthermore, the highest progressive motility (40.5-52.52%) was observed in the treatment with ringers lactate-yolk fructose, KA-EN 3B-yolk fructose, ringers acetate-yolk fructose and ringers acetate-yolk glucose, while the lowest immotile was found in ringers acetate-yolk glucose and the highest in KA-EN 3B-yolk fructose and ringer acetate-yolk without sugar.

Kinematic parameters after storage

The results showed that the type of crystalloid diluent and sugar interactions did not affect the DCL (30.3-37.37 µm), DAP (16.68-18.58 µm), DSL (10.93-12.84 µm), VCL (74-93.63 µm s-1), VAP (41.19-46.85 µm s-1), VSL (27.6-32.1 µm s-1), WOB (49.2-58.4 %), BCF (19.79-22.98 Hz), ALH (5.1-5.53 µm), dan AOC (14.48-17.86) (Tables V and VI). However, the type of sugar treatment affected LIN and STR, for example, the addition of glucose to the KA-EN 3B-yolk diluent decreased sperm linearity. The highest linearity ranged from 35.2-43.4% while the lowest ranged from 31-37.88%. Moreover, the addition of glucose to ringer’s lactate-yolk and KA-EN 3B-yolk decreased straightness, while the addition of fructose had no effect on each type of crystalloid diluent. The highest straightness ranged from 71.2-77.8%, while the lowest ranged from 63.2-70.4%.

 

Table V. DCL, DAP, DSL, VCL, VAP and VSL of Gaga chicken sperm at 48 h of cold storage that dilution with with ringer lactate-yolk, ringer acetate-yolk, and KA-EN 3B-yolk added with glucose or fructose.

Semen sample	DCL (µm)	DAP (µm)	DSL (µm)	VCL (µm s-1)	VAP (µm s-1)	VSL (µm s-1)
Ringer lactate-yolk No sugar Glucose Fructose Ringer acetate-yolk No sugar Glucose Fructose KA-EN 3B-yolk No Sugar Glucose Fructose SEM Effects Extender Sugar Extender x sugar	30.30 34.33 35.53 32.43 35.41 37.37 30.96 37.11 33.31 0.890 0.726 0.090 0.844	16.68 18.53 17.40 17.09 18.03 18.58 17.24 17.61 18.06 0.364 0.916 0.419 0.921	12.84 12.28 12.13 11.99 12.15 12.35 12.18 10.93 12.66 0.191 0.580 0.385 0.434	74.00 82.61 90.31 83.03 87.22 93.63 74.90 91.43 81.90 2.225 0.520 0.093 0.683	41.19 45.17 44.87 44.40 44.77 46.85 42.07 43.96 44.92 0.913 0.700 0.400 0.114	32.10 30.27 31.73 31.36 30.31 31.23 29.95 27.60 31.53 0.544 0.432 0.254 0.902

 

DCL, distance curve-line; DAP, distance average path; DSL, distance straight-line; VCL, velocity curve linear; VAP, velocity average pathway; VSL, velocity straight line.

 

Table VI. LIN, STR, WOB, BCF, ALH and AOC of Gaga chicken sperm at 48 h of cold storage that dilution with with ringer lactate-yolk, ringer acetate-yolk, and KA-EN 3B-yolk added with glucose or fructose.

Semen sample	LIN (%)	STR (%)	WOB (%)	BCF (Hz)	ALH (µm)	AOC
Ringer lactate-yolk No sugar Glucose Fructose Ringer acetate-yolk No sugar Glucose Fructose KA-EN 3B-yolk No Sugar Glucose Fructose SEM Effects Extender Sugar Extender x sugar	43.40b 36.80ab 36.00ab 37.80ab 35.20ab 33.40a 42.60b 31.00a 38.80ab 0.839 0.289 0.005 0.265	77.80c 67.80ab 71.20bc 70.40ab 68.20ab 66.80ab 71.60bc 63.20a 70.40ab 0.754 0.069 0.003 0.255	56.00 54.60 50.20 53.60 51.40 50.00 58.40 49.20 55.40 0.804 0.386 0.061 0.239	22.20 21.00 21.31 22.98 21.50 21.03 21.67 19.79 20.74 0.348 0.422 0.176 0.962	5.53 5.19 5.10 5.39 5.29 5.53 5.18 5.42 5.46 0.102 0.878 0.953 0.775	15.21 15.24 17.86 14.88 16.40 16.75 16.11 15.73 14.48 0.307 0.636 0.442 0.121

 

Note: Different superscripts in the same column show significant differences (P <0.05). LIN, linearity; STR, straightness; WOB, wobble; BCF, beat cross frequency; ALH, amplitude lateral head; AOC, average orientation dan change of head.

 

DISCUSSION

The use of crystalloid and sugar diluents had no effect on the viability of spermatozoa stored for 24 and 48 h, indicating that both fructose and glucose are suitable for maintaining the life of spermatozoa. A previous study on ram spermatozoa reported that the use of glucose and fructose had no significant effect on viability (Panyaboriban et al., 2015). The storage of spermatozoa for 24 h in this study produced a higher result compared to a previous study by Łukaszewicz et al. (2020) which obtained 76.2% using EK diluent with the same storage. The viability obtained in this study was very good namely above 95% at 48 h. This value is higher than a previous study which reported that the viability of chicken spermatozoa at 48 h storage was 87.8% using fructose in egg yolk with coconut water (Rochmi and Sofyan, 2019).

The most common abnormal morphology found in this study were bent tails and bent midpieces. Abnormal morphology was reduced by the presence of glucose or fructose in ringer’s acetate-yolk or ringer’s lactate-yolk diluent. This is consistent with Stanishevskaya et al. (2021) study which stated that monosaccharides (glucose and fructose) function as an energy supply and for maintenance of the osmotic balance in sperm. Also, it is in line with another study on Tambaqui fish sperm which reported that abnormal morphology in the form of a bent tail was found to be lower in glucose-containing diluents (Oliveira et al., 2016). Subsequently, a previous study reported that glucose was effective in maintaining the morphology of donkey sperm (Dorado et al., 2019).

Abnormal sperm morphology in ringers lactate-yolk was higher compared to ringer’s acetate-yolk and KA-EN 3B-yolk presumably due to the low pH in the diluent. Hofmann-Kiefer et al. (2012) stated that lactated Ringers solution produces a greater decrease in pH compared to acetate. The chicken sperm activities decrease at low pH (Sarkar, 2020), while acetate stimulates the process of respiration in the mitochondria of cells (Hu et al., 2020).

The use of ringers lactate diluent caused high abnormal morphology, this is in line with a previous study on horse sperm which explained that the addition of lactate does not improve sperm quality, but rather has a detrimental effect over time (Hernández-Avilés et al., 2021). Furthermore, the KA-EN 3B-yolk diluent caused the lowest abnormal morphology despite containing sodium lactate. This is presumably because it also contains 2.7% glucose which nourishes spermatozoa during storage. The abnormal morphology in the KA-EN 3B-yolk diluent at 24 and 48 h was lower compared to the result obtained from broiler chicken sperm with Lake diluent, namely 25.3-26.7% and 44.1-46.1%, respectively (Masoudi et al., 2019). Storage increases the abnormal morphology in spermatozoa due to an increase in reactive oxygen species (ROS). According Pintus and Ros-Santaella (2021), semen storage at 4-5oC was reported to increase ROS. Thereby leading to pathological sperm morphology and lipid peroxidation (Bansal and Bilaspuri, 2010).

This study showed that the addition of sugar in ringer’s acetate diluent increases the total and progressive motility, also reduces the percentage of immotile spermatozoa. This is presumably because the sugar provides an additional source of energy for spermatozoa during storage. Besides, the progressive motility of chicken sperm is highly dependent on all energy production originating from the mitochondrial compartment (Sangani et al., 2017). The results showed that the addition of fructose to ringer’s acetate-yolk significantly improved the motility of spermatozoa. Meanwhile, Stanishevskaya et al. (2021) reported that fructose is a sugar that easily penetrates the cell membrane of chicken spermatozoa and creates additional energy reserves to ensure sperm motility.

The combination of ringers acetate with glucose generally produced the best spermatozoa motility parameters from all treatments. Acetate is an intermediate in many metabolic reactions and provides substrates for spermatozoa (Graham et al., 1982). Furthermore, chicken sperm motility had a positive correlation with mitochondrial respiration enzyme activity and adenosine triphosphate (ATP) production (Sangani et al., 2017). ATP is produced through glycolysis and oxidative phosphorylation of glucose and is used as an energy source to maintain the motility of chicken spermatozoa (Setiawan et al., 2020).

The results obtained from this study are in line with previous studies on different species. Glucose and fructose have a strong influence on motility and movement patterns of dog spermatozoa at low-temperature storage, but glucose consumption is greater when both sugars are present in equal amounts (Ponglowhapan et al., 2004). Kuzlu dan Taşkin (2017) reported that glucose diluents are a good choice for a long-term storage of turkey sperm. Furthermore, the motility obtained was significantly higher than the result of another study that used Ringer’s lactate diluent and had 16% motility of domestic chicken sperm at 48 h storage (Iswati et al., 2018). The total and progressive motility with the addition of sugar was also higher than previous studies that used tris diluent with a value of 54.04% and 15.18%, respectively, in chicken sperm (Touazi et al., 2018).

The type of sugar and crystalloid diluent interactions did not affect the kinematic parameters of spermatozoa except linearity and straightness. The linearity showed no significant difference with or without glucose in ringer’s lactate-yolk and ringer’s acetate-yolk diluents. These results are consistent with previous reports that there was no difference in the linearity of chicken sperm between the diluent without glucose and the others containing 20 mM of glucose after incubation (Setiawan et al., 2020). Furthermore, the straightness in ringer’s acetate-yolk diluent showed no significant difference with the addition of glucose and fructose. These results are also in congruent with previous study which stated that there was no difference in the straightness of chicken spermatozoa between the diluent without glucose and others containing 20 mM of glucose after incubation (Setiawan et al., 2020).

The addition of glucose decreased the linearity in KA-EN 3B-yolk diluent and the straightness in ringer’s lactate diluent, while the addition of fructose produced no significant differences in linearity and straightness. This is alignment with previous study on dog sperm which stated that fructose induces linear patterned movement, while glucose causes greater oscillatory movements (Rigau et al., 2001). The low linearity in KA-EN 3B-yolk diluent is probably due to the high glucose content in this diluent compared to ringer’s lactate-yolk and ringer’s acetate-yolk diluent. However, the spermatozoa kinematics in this study were higher than the previous reports, namely VSL 8.55 µm s-1, VAP 17,55 µm s-1, ALH 2,62 µm, and BCF 3,05 Hz using a tris diluent containing fructose at 48 h storage (Touazi et al., 2018). Based on all the results of our study, we found that in general the addition of glucose in ringer’s acetate-yolk resulted in the best quality of spermatozoa during storage.

CONCLUSION

In conclusion, the addition of glucose or fructose in the diluent can maintain the quality of the Gaga chicken spermatozoa. The addition of glucose in Ringer’s acetate yolk diluents maintains the best quality of spermatozoa during 48 h of storage in cooled storage.

Funding

Our gratitude goes to the Council for Higher Education Research and Development of Muhammadiyah Central Leadership assemblies who have provided basic research funds for Muhammadiyah Research with a contract number 0842.339/ PD/I.3/C/2021. We also thank Etta Nur Farm on Tondong Street, North Sinjai District.

Statement of conflict of interest

The authors have declared no conflict of interest.

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