Polymorphism of FecB gene in nine sheep breeds or strains and its effects on litter size, lamb growth and development

Yi chuan xue bao = Acta genetica Sinica
Feng GuanLi-Guo Yang

Abstract

Nine sheep breeds or strains, including 615 individuals were screened with forced PCR RFLP method for the FecB gene to study the polymorphism and its effects on litter size, body weight and body size. Results showed that the polymorphism frequencies of FecB gene were significantly imbalanced in these breeds or strains. The Hu sheep were all homozygous carriers of FecB gene(BB). In the Chinese Merino prolific meat strain, the genotype frequencies of BB, B+ and ++ were 51%, 30% and 19%, respectively, whereas all the other flocks had only the wild-type (++) genotype. Results within the Chinese Merino prolific meat strain showed that the mean litter size of ewes with genotype BB and B+ were 2.8 (+/-0.74) and 2.3 (+/- 0.63) (P < 0.05), whereas ++ genotype ewes had a litter size of only 1.2 (+/-0.68) (P < 0.01). At day 90 after birth, the body weights of BB/B+ genotype lambs were higher than that of ++ genotype lambs (18.6 +/- 3.70 kg, 18.0 +/- 3.71 kg vs 15.6 +/- 2.22 kg, P < 0.05). In addition, the heart girth and chest width of BB/B+ genotype lambs were significantly longer than those of the ++ lambs (P < 0.05). No significant differences were observed in either body weight or body size at day 120. Litter size at first lambing fro...Continue Reading

References

Jun 26, 1998·Journal of Reproduction and Fertility·Y CognieM A Driancourt
Apr 26, 2001·Proceedings of the National Academy of Sciences of the United States of America·P MulsantJ M Elsen
May 25, 2001·Reproduction : the Official Journal of the Society for the Study of Fertility·G W MontgomeryK P McNatty

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Citations

Jul 22, 2011·Animal Biotechnology·Joyabrata RoySurender Lal Goswami
Feb 15, 2019·International Journal of Veterinary Science and Medicine·Hiam NagdyOthman E Othman
Jan 22, 2020·Reproduction in Domestic Animals = Zuchthygiene·Zhiquan LianYaokun Li
May 15, 2013·Molecular Biology Reports·Guirong SunXiangtao Kang

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