Arias J A, Bitgood J J
Department of Meat and Animal Science, University of Wisconsin-Madison 53706.
Poult Sci. 1991 Apr;70(4):733-8. doi: 10.3382/ps.0700733.
The F2 progeny from an original mating between chickens that were carriers of the MN t(1;4) chromosome translocation and the inbred WI-ES line were compared to determine if the translocation had any effect on selected economic traits. Homozygous translocation (TT), heterozygous translocation (TN), and karyotypically normal (NN) individuals were compared. Traits analyzed were body weight at 8, 18, 39, and 55 wk of age; shell deformation; Haugh units; egg weights at 32 and 55 wk of age; sexual maturity; egg production; and male fecundity. The TT group had greater body weights at 39 and 55 wk than the TN and NN groups, and at 55 wk the TN group was heavier than NN group. Shell deformation was greater for TT birds at 32 wk. At 32 wk, Haugh units of the TT and TN birds, and the TN and NN birds were not significantly different. The TT eggs were heavier than the TN eggs at 32 wk, which in turn were heavier than the NN eggs. Sexual maturity was reached in the order NN, TN, then TT. Eggs from TT males had the lowest fertility and highest percentage of late dead embryos. There were increased early deaths among embryos from heterozygous males. An unexplained higher number of pips among embryos from normal males was noted. No differences were noted among any other traits in either sex. Results suggest that this translocation may have some effect on production traits.
对携带MN t(1;4)染色体易位的鸡与近交WI-ES品系进行原始交配产生的F2后代进行比较，以确定该易位对选定经济性状是否有任何影响。对纯合易位（TT）、杂合易位（TN）和核型正常（NN）的个体进行了比较。分析的性状包括8、18、39和55周龄时的体重；蛋壳变形；哈夫单位；32和55周龄时的蛋重；性成熟；产蛋量；以及雄性繁殖力。TT组在39周和55周时的体重比TN组和NN组更大，在55周时TN组比NN组更重。32周时TT组鸡的蛋壳变形更大。32周时，TT组和TN组鸡的哈夫单位，以及TN组和NN组鸡的哈夫单位没有显著差异。32周时TT组的蛋比TN组的蛋重，而TN组的蛋又比NN组的蛋重。性成熟顺序为NN、TN、TT。TT组雄性的蛋受精率最低，晚期死胚百分比最高。杂合雄性的胚胎早期死亡增加。注意到正常雄性的胚胎中有数量较多且原因不明的啄壳情况。在其他任何性状上，两性之间均未发现差异。结果表明，这种易位可能对生产性状有一定影响。
