Assessing the Impact of Genotype and Environment Interaction on Growth Performance of Hatchery Produced Catla catla
Assessing the Impact of Genotype and Environment Interaction on Growth Performance of Hatchery Produced Catla catla
Shafia Riaz1, Khalid Abbas1*, Tanveer Ahmed1,2*, Huma Naz3, Hina Amjad1 and Shahbaz Ahmad1
ABSTRACT
The culture conditions influence the magnitude of genetic expression in fish. This study was undertaken to assess the impact of Genotype (G) × Environment (E) interaction on the growth performance of hatchery produced Catla catla. The different hatchery stocks including Farooqabad (FQB), Lahore (LHR), Faisalabad (FSD), Bhalwal (BHL) and Qadirabad (QBD) assumed as five distinct genotypes were compared for genetic variability in relation to growth performance. Appraisal fish fingerlings were reared in glass aquaria (twenty fish per population) for 60 days under similar environmental conditions. Condition factor (K) and growth parameters (wet weight, fork and total length) were measured fortnightly. The morphometric data were analyzed using SPSS. Genetics characterization was performed by employing five species specific polymorphic microsatellite markers. Overall, the results of growth trial confirmed that FQB genotype performed maximum while QBD evinced lowest performance among all the genotypes based on wet weight (g) and total length (mm). Genetic analysis revealed significant differences based on allelic frequencies, heterozygosity, inbreeding and genetic distance among hatchery genotypes. Impact of G×E interaction is illustrated by results where genetically diverse FQB genotype performed maximum under similar cultural environment among all genotypes.
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