›› 2017, Vol. 44 ›› Issue (3): 825-831.doi: 10.16431/j.cnki.1671-7236.2017.03.029

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Study on Genetic Polymorphism and Ultrasound Measurements for Major Meat Quality Traits in Beef Cattle

LI Na1,2, LI Hong-bo1, ZHOU Zhen-yong1, ZHANG Jin-shan1, YAN Xiang-min1, DU Wei1, YUAN Li-xing1, ZHANG Yang1   

  1. 1. Xinjiang Academy of Animal Sciences, Urumqi 830000, China;
    2. Gansu Agricultural University, Lanzhou 730070, China
  • Received:2016-08-11 Online:2017-03-20 Published:2017-03-21

Abstract:

In this study,we used PCR-SCCP connect with ultrasonic vivo assay techniques, analysis of correlation between Leptin gene exon Ⅱ E2JW polymorphism and part meat quality traits of backfat thickness, eye muscle area, fat content, plot eye height in Xinjiang Brown cattle at ante-mortem, post-mortem. The results showed that Leptin gene exon Ⅱ E2JW site PIC was moderate polymorphisms (0.25 < PIC < 0.5), there were three genotypes of AA, AB and BB, AB genotype were the predominant genotype, B was the predominant allele. In addition, the forecast value of AB and AA gennotypes individual muscle fat content were inconsistent with actual value.Leptin gene exon Ⅱ E2JW was identified the theroy of a candidate gene loci of beef quality traits in Xinjiang Brown cattle.Genetic polymorphism and ultrasound measurements could not only fastly and accurately measure portion meat traits, but also as a means of marker-assisted selection.

Key words: Xinjiang Brown cattle; Leptin gene; exon Ⅱ E2JW site; genetic polymorphism; ultrasonic; meat quality traits

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