Associations between leptin gene polymorphism and some reproductive traits in Holstein-Friesian dairy cattle
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Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Journal of the Hellenic Veterinary Medical Society
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The aim of this study was to determine the effect of leptin gene polymorphism and other environmental factors on age at first breeding (AFB; day), age at first calving (AFC; day), service period (SP; day), number of inseminations per conception (NIPC; count), gestation period (GP; day) and calving interval (CI; day). For this purpose, whole blood samples were obtained from the Vena coccygea of 212 Holstein-Friesian dairy cattle reared on a private farm in Türkiye. The Sau3AI restriction enzyme with the PCR-RFLP method was used to determine the polymorphism of 422 base pairs (bp) in the intron 2 region of the leptin gene. The frequencies of the A and B alleles and the AA, AB and BB genotypes were determined to be 0.8821 and 0.1179, and 0.764, 0.236 and 0.000, respectively. There were no animals with the BB genotype in the population. The population of Holstein-Friesian was also at the level of Hardy-Weinberg equilibrium with regard to the leptin gene (P>0.05). The study found the highest direct heritability in the GP trait (0.33±0.268), while the lowest was observed in the NIPC trait (0.01±0.118). For the traits SP (P<0.10), NIPC (P<0.05), and CI (P<0.05), higher values were recorded in cattle with genotype AA compared to those with genotype AB. However, no significant association was found between genotypes and AFB, AFC, GP, and estimated breeding values (EBVs). This suggests that the heritability of these traits may not be strongly affected by the genotypes emphasized. As a result, the AB genotype or B allele could be used in selection for SP, NIPC, and CI, but the allele or genotype did not suggest marker-assisted selection (MAS) for AFB, AFC, and GP. Copyright
Açıklama
Anahtar Kelimeler
Estimated Breeding Values, Heritability, Reproductive Traits, Sau3AI polymorphism, Variance Components
Kaynak
WoS Q Değeri
Q4
Scopus Q Değeri
Q4
Cilt
75
Sayı
4
Künye
Kibar, M., & Aytekin, İ. (2024). Associations between leptin gene polymorphism and some reproductive traits in Holstein-Friesian dairy cattle: Επίδραση του γονιδίου της λεπτίνης στη γονιμότητα. Journal of the Hellenic Veterinary Medical Society, 75(4), 8163-8172.
