日本鹌鹑肉系高体重选择对生长的影响

Abdalrahem Amrabit, A. El-Raffa, Amira Eldlebshany, Ahmed Tawhid Ahmed Soliman
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引用次数: 0

摘要

本研究的主要目的是估计对6周龄高体重个体选择(BW6)的直接反应,并估计该品系连续两代的BW6的实现遗传力。此外,还对日本鹌鹑肉系其他生长性状的相关响应进行了估计。结果是由这项工作得出的;选育品系各年龄体重均值均高于对照品系,且选育世代间差异极显著。从世代上看,各年龄段体重均以第二代最重,基部最轻,差异极显著。结果表明,选育株系与对照株系相比,选育株系在不同时期日增重均有显著提高,且差异显著。代间,二选代各时期日增重均高于其他代,差异极显著。BW6的直接选择反应在第一代为16.76 g,第二代为5.97 g,选择反应逐渐减弱。最后两代选择系6周龄体重均比对照增加22.73 g。BW6的选择与孵化、2、4周龄体重呈显著正相关。在0(孵化)- 2周龄、2 - 4周龄、4 - 6周龄和0 - 6周龄,选择BW6两代后,日增重分别提高了0.41、0.67、0.50和0.53 g/d。由此可见,6周龄高体重选择的结果不仅提高了鹌鹑同期体重,而且提高了不同年龄段的体重和不同生长阶段的日增重。此外,这些改进在第一代选择中比第二代更高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
GROWTH RESPONSES TO SELECTION FOR HIGH BODY WEIGHT IN MEAT LINE OF JAPANESE QUAIL
The main objectives of the present study were to estimate the direct response to individual selection for high body weight at six weeks of age (BW6) with estimated the realized heritability of BW6 from two successive selected generations of this line. Besides that, estimate the correlated responses for other growth traits in meat line of Japanese quail. The results were obtained from this work; the means of body weight at different ages for selected line were higher than for control line with highly significant differences in both selected generations. with respect to generation, the results were shown the heaviest body weight at all different ages in the second generation and the lightest in the base with highly significant differences. The results revealed improving of daily weight gain during different periods for selected line in both selected generations compared control line with significant differences. Among generations, the daily weight gains during all different periods of second selected generation were the highest than the rest of generations with highly significant differences. Direct selection response of BW6 was in the first generation (16.76 g). However, selection response decreases in the second generation (5.97 g). Finally of two selected generations, the body weight at 6 weeks of age increased by 22.73 g. for selected line comparing with control line. Also, the selection for BW6 had positive correlated responses on body weight at hatch, 2 and 4 weeks of ages. The daily weight gains have improved after two generations of BW6 selection by 0.41, 0.67, 0.50 and 0.53 g/d during 0 (hatch) – 2, 2 – 4, 4 6 and 0 – 6 weeks of ages, respectively. It can conclude that the results of selection for high body weight at 6 weeks of age was caused improvement body weight at the same age and also improvements both of body weight at different ages and daily weight gain during different periods of quail growth stage. Moreover, these improvements were higher in the first generation of selection than the second.
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