Angiopoietin-like 4(ANGPTL4) is a secreted protein of the angiopoietin family and is involved in angiogenesis ...
Ma Yun~1,Chen Ningbo~1,Yang Ting~(1,2) (1.College of Life Sciences,XinYang Normal University,Xinyang,Henan 464000,China 2.College of Animal Husbandary and Veterinary Medicine,Henan Agricultural University,Zhengzhou 450002,China)
拷贝数变异(copy number variation,CNV)作为遗传变异的一种新能源在表型差异和物种进化中起着重要作用,引起了研究者的广泛兴趣。拷贝数变异是指大小在kb到Mb范围内的DNA片段的多态。人类对于正常个体和许多模式动物的CNV已经做过很多的研究工作,并通过生物信息和杂交的方法确定了CNV的区域,进一步研究发现拷贝数变异还与某些哺乳动物的致病机理有着密切的联系。本文主要内容是对拷贝数变异在牛,猪,羊,鸡中的研究进展进行综述,并对其在畜禽选种育种中的应用前景进行展望。
17 β-Hydroxysteroid dehydrogenase type 8 （HSD17B8） is an important regulator of lipid and steroid metabolism. In the present study, we aimed to assess the effects of HSD17B8 on growth and meat quality traits in cattle. Transcription profile analysis showed that HSD17B8 was primarily expressed in the salpinx, liver, and testis. Meanwhile, we identified three SNPs （SNPI： intron 1-A91G; SNP2： exon 1-A90G; and SNP3： intron 8-A86G） of the bovine HSD17B8 gene and investigated its haplotype frequencies and linkage disequilibrium. The detected SNPs were found associated with growth traits （body weight, body length, height at withers, heart girth, hip width, and average daily gain） in native cattle populations （Nanyang and Jiaxian） as well as the meat quality traits （Warner- Bratzler shear force, rib area, dressing percentage, carcass weight, and backfat thickness） in commercial breeds （Angus, Hereford, Limousin, Luxi, Simmental, and Jinnan）. Our results provided evidence that polymorphisms in the HSD17B8 gene were associated with growth traits and meat quality traits. Moreover, our findings might be used for marker-assisted selection in beef cattle breeding program
