大豆rDNA ITS1片段的分离与克隆研究简报

ANALYSIS OF CORRELATION BETWEEN SOME EARLY AND LATE WEIGHTS AND TIBII LENGTHS IN BROILERS

摘要:

本文通过对海布罗、罗曼、艾维茵、宝星等四个品种肉鸡早期体重和胫骨长度与后期体重和胫骨长度的相关分析, 得出以下结果:四个品种肉仔鸡的初生重与后期体重及增重速度无关; 4, 5, 6, 7周末体重与8周末体重呈极显著正相关, 随着周龄的增长, 与8周末体重的相关系数逐渐增高。按本试验得出的4条总回归方程, 根据4, 5, 6, 7周体重, 可以预测8周体重。由于5周与8周体重呈强正相关, 因此可以根据5周体重进行早期选种。本试验测定的四个品种肉仔鸡初生雏胫骨长度变异较小, 初生雏胫骨长度与各周龄胫骨长度相关不显著, 与各周末体重相关亦不显著; 4, 6, 7周胫骨长度与8周体重和胫骨长度存在一定程度的相关, 但不如早期体重性状相关程度高。根据早期胫骨长度进行间接选择, 不如用早期体重选择准确度高。

Abstract:

A correlation analysis between some early and late weights and tibii lengths for Hybro, Lob-mann, Avian, Superstarbro showed that there was no relationship of birth weight with late weightand growth spead in the four breeds and that there was positivly relationships of 4, 5, 6, 7-week-aged weights with 8-week-aged one and the relation degree increased gradually as wcck age ad-vanced. Eight-week-aged weight can be calculated on the basis of the four regression equtions from4, 5, 6, 7-week-aged weights. Selection can be conducted at early week according to 5-week-agedweight. Also findings of the experiment showed that there was a little variation for tibil Lengths ofbirth chicken in the four breeds, that there was no significant relationship between tibii lengths ofbirth chicken in the four breeds, that there was no significant correlation of tibii lengths of birthchicken With other week-aged ones and weights and that the relationship of 4, 6, 7-week-aged tibiilengths with 8-week-aged one was less than that between early weight and 8-week-aged weight. Sothe degree of accuracy of indirect selection is higher in the light of early weights than early tibiilenghths in broilers.