Minvielle F, Mills A D, Faure J M, Monvoisin J L, Gourichon D
Laboratoire de Génétique Factorielle, INRA, Jouy-en-Josas, France.
Poult Sci. 2002 Mar;81(3):321-6. doi: 10.1093/ps/81.3.321.
Fearfulness and economic traits were studied in three lines of Japanese quail. Two of the lines were of the same genetic origin and were subjected to divergent selection for the duration of tonic immobility (TI), a measure of fearfulness. Birds were selected for long (LTI) or short (STI) duration of TI. The third line (DD) was of a different genetic origin and had been selected for early egg production. Fear, growth, residual feed intake, and measures of egg composition and production varied among lines. The distribution of TI in Line DD was closer to that from Line STI. Residual feed intake and shell content were lowest in the DD line. The DD birds laid more broken eggs than quail of the other lines. The STI line birds had higher BW and laid more, but smaller, eggs than LTI line birds. Eggs laid by LTI line birds had higher albumen content, but lower percentage shell, than those laid by STI line birds. When all traits were considered together, there was an overall tendency for STI line birds to out perform LTI birds with DD line birds showing intermediate performance. This finding supports the notion that there is a relationship between fearfulness and productivity. However, the skewed distribution of TI precluded estimation of correlation with production traits in the LTI and STI lines. No significant relationships among fear and production-related traits were found in the DD line, which contradicts the notion that fearfulness and production are related.
对三个品系的日本鹌鹑的恐惧性和经济性状进行了研究。其中两个品系具有相同的遗传起源，针对强直静止（TI）时长（一种恐惧性指标）进行了 divergent 选择。选择 TI 时长较长（LTI）或较短（STI）的鸟类。第三个品系（DD）具有不同的遗传起源，并且已针对早期产蛋进行了选择。不同品系之间的恐惧、生长、剩余采食量以及蛋的组成和产量指标存在差异。DD 品系中 TI 的分布更接近 STI 品系。DD 品系的剩余采食量和蛋壳含量最低。DD 品系的鹌鹑产的破蛋比其他品系的鹌鹑更多。STI 品系的鸟类体重更高，产蛋数量更多但蛋更小，比 LTI 品系的鸟类产蛋情况要好。LTI 品系的鸟类产的蛋蛋白含量较高，但蛋壳百分比低于 STI 品系的鸟类产的蛋。当综合考虑所有性状时，总体趋势是 STI 品系的鸟类表现优于 LTI 品系的鸟类，DD 品系的鸟类表现居中。这一发现支持了恐惧性与生产力之间存在关联的观点。然而，TI 的偏态分布使得无法估计 LTI 和 STI 品系中与生产性状的相关性。在 DD 品系中未发现恐惧与生产相关性状之间存在显著关系，这与恐惧性和生产相关的观点相矛盾。
