›› 2019, Vol. 46 ›› Issue (8): 2415-2422.doi: 10.16431/j.cnki.1671-7236.2019.08.027

• Genetics and Breeding • Previous Articles     Next Articles

Morphological Variation Analysis of Fat Tail of the Backcrossing Second Generation of Wild Argali Sheep×Bashbay Sheep

WANG Xinyue, CAO Hang, LYU Shipeng, WANG Qiong, LIU Lingling, JUEKEN Aniwash, LIU Wujun   

  1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China
  • Revised:2019-05-09 Online:2019-08-20 Published:2019-08-17

Abstract:

This study was aimed to investigate the morphological characteristics of fat tail and the effect of the size of fat tail on the body size index after backcrossing between wild Argali sheep and Bashbay sheep.216 breeding backcrossing second generation of wild Argyi sheep×Bashbay sheep with the same feeding and good body conditions were collected to calculate the variation coefficient of fat tail traits, then according to the fat tail traits to study the separation and differentiation of fat tail of the backcrossing second generation by K-mean cluster analysis of R language method, and the differences of 7 body weight indexes of the backcrossing second generation of fat tail sheep (body weight, body length index, chest circumference index, tube circumference index, body index, limb length index and chest index) were analyzed by SPSS 19.0 software.The results showed that the backcrossing second generation of wild Argyi sheep×Bashbay sheep could be divided into four types:Small tail type, medium tail type, big tail type and fat tail type through the cluster analysis results.The body length index of fat tail type was extremely significantly larger than small tail type (P<0.01), the body index of big tail type was extremely significantly larger than small tail type (P<0.01), and the chest circumference index and chest index of big tail and fat tail types were extremely significantly larger than small tail type (P<0.01), but there was no significant difference in body weight, tube circumference index and limb length index in each tail type (P>0.05).This results indicated that the traits of the backcrossing second generation of fat tails were separated, the larger the fat tail, the larger the body size, but the body weight did not change significantly.Combined with the characteristics of appearance and production performance of wild Argali sheep and Bashbay sheep, big tail and fat tail types were closer to Bashbay sheep in the body type, and small tail type was closer to wild Argali sheep in the tail type.

Key words: wild Argali sheep; Bashbay sheep; backcrossing second generation; lipid tail typing; body weight; body size

CLC Number: