A亚型禽白血病的遗传抗性位点与肉鸡重要经济性状的关联分析

doi:10.11843/j.issn.0366-6964.2019.04.005

Abstract

Abstract:

To investigate the association of genetic resistance loci to subgroup A avian leukosis virus(ALV) with important economic traits, the genetic variations within resistance loci of tva gene were screened in an F₂ resource population of broilers, which contained 788 healthy chicken. Production-related traits such as body weight, breast muscle weight, leg muscle weight on 6, 8, 10, 12 weeks and slaughter weight were measured, separately, and their association with genetic resistance loci to subgroup A avian leukosis virus was analyzed. Three variants (tva^r3, tva^r5 and tva^r6, named tva^mut502-516) were discovered in the F₂ population. Association analysis revealed that the tva^mut502-516 was significantly associated with abdominal fat weight (AFW) and abdominal fat rate (AFR) (P<0.05), but not significantly associated with growth, feed efficiency and other carcass traits (P>0.05). These results indicate that the mutation of genetic resistance loci to subgroup A avian leukosis virus can significantly decrease the AFW and AFR of chicken, and had no unfavorable effect on growth, feed efficiency and other carcass traits, therefore, these loci can balance the ALV-A resistance and growth development, can be applied in subgroup A ALV resistant breeding of broilers.

Key words: broilers, tva receptor gene, genetic resistance, subgroup A avian leukosis virus, economic traits

CLC Number:

S826.2

GAN Shiyi, WANG Jie, LUO Chenglong, QU Hao, SHU Dingming. Association of Genetic Resistance Loci to Subgroup A Avian Leukosis Virus with Important Economic Traits in Broilers[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2019, 50(4): 721-726.

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Association of Genetic Resistance Loci to Subgroup A Avian Leukosis Virus with Important Economic Traits in Broilers

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