GENETIC-VARIATION IN THE TIME OF OVIPOSITION IN THE LAYING HEN
GENETIC-VARIATION IN THE TIME OF OVIPOSITION IN THE LAYING HEN
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DOI：
10.1080/00071669108417354
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发表时间：
1991-05-01
影响因子：
2
通讯作者：
LILLPERS, K
中科院分区：
文献类型：
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作者：
LILLPERS, K
1.现代鸟类产卵次数的分布范围较窄。因此，在母鸡必须争夺巢箱的管理系统中，一些鸡蛋将被产在地板上。本研究的目的是探讨利用遗传学方法改变产卵时间同时保持高生产率的可能性.对来自三个选育系的464只母鸡进行51周龄前的产蛋记录，计算其平均产卵时间.平均产卵时间的遗传力估计值分别为0.38，0.68和0.78.5。三个品系的平均产卵时间和某些重要生产性状之间的遗传相关性不同。然而，在保持高生产率的同时，应该可以改变平均产卵时间。建议通过对平均产卵时间进行发散选择和在同一商业群中混合不同基因型，保持在地板上或其他非笼系统中，来增加产卵时间的传播。
1. The distribution of oviposition times in modern ayers is relatively narrow. Consequently, in management systems where hens have to compete for nestboxes, some eggs will be laid on the floor.2. The purpose of this study was to investigate the possibility of using genetic methods to change oviposition time while maintaining a high production rate.3. The mean oviposition times of 464 hens from three selection lines were calculated using time-of-lay records for every egg laid until the hens reached 51 weeks of age.4. Heritability estimates for mean oviposition time were high for each of three lines: 0.38, 0.68 and 0.78.5. The three lines differed in terms of the genetic correlations between mean oviposition time and certain important production traits. It should, however, be possible to shift the mean oviposition time while maintaining a high production rate.6. It is suggested that the spread in oviposition times be increased by performing divergent selection for mean oviposition time and by mixing the different genotypes in the same commercial flock, kept on the floor or in other non-cage systems.