Identification of Melatonin Receptors Type C (MTNR1C) and Neuropeptide Y (NPY) Genes Related to Egg Production in Thai Indigenous Chickens
Identification of Melatonin Receptors Type C (MTNR1C) and Neuropeptide Y (NPY) Genes Related to Egg Production in Thai Indigenous Chickens
Doungnapa Promket1*, Khanitta Pengmeesri1, Jennarong Kammongkun2, Thassawan Somchan1
ABSTRACT
Melatonin receptors type C (MTNR1C) and neuropeptide Y (NPY) have a significant influence in the chicken egg production characteristic. In our study, we worked with three hundred Thai indigenous chickens. This study employed PCR-RFLP genotyping of the MTNR1C and NPY genes to investigate their association with egg production traits. The results revealed significant associations between these genes and several egg production parameters on Thai indigenous chicken populations. In the case of the MTNR1C gene, significant effects were observed on WE360d, NE360d, and E/M (P < 0.05). Specifically, Thai indigenous chickens carrying the AA genotype in the MTNR1C gene displayed higher WE360d values compared to GG genotypes. Furthermore, the GG genotypes of MTNR1C were associated with higher NE360d and E/M values (195.61 eggs and 16.30 eggs, respectively) compared to the AA genotype (181.09 eggs and 15.09 eggs, respectively). Notably, the NPY gene exhibited highly significant associations with NE270d, NE360d, E/M, and E_Mass (P < 0.01). Specifically, the BB and Bb genotypes in the NPY gene correlated with significantly higher NE270d values (163.25 and 160.10 eggs, respectively) compared to the bb genotype (148.00 eggs). Moreover, the bb genotype exhibited lower NE360d and E/M values (181.64 eggs and 15.13 eggs, respectively), while BB and Bb genotypes displayed the highest NE360d values (203.33 and 194.27 eggs) and E/M values (16.94 and 16.18 eggs). These findings underscore MTNR1C and NPY gene were the genetic factors influencing egg production in Thai indigenous chickens, offering valuable insights for selective breeding programs aimed at enhancing egg production.
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