At present,PRL gene(prl) has been considered to be associated with poultry breeding performance of the candidate genes.
目前,PRL基因(prl)已被认为是与家禽繁殖性能相关的候选基因之一。
参考来源 - 四川白鹅prl外显子2和5SNP与产蛋性能关系的初探·2,447,543篇论文数据，部分数据来源于NoteExpress
They are in the same shape and appearance, good at breeding performance, with the high-quality furs and grow fast at the early stage.
具有体型外貌一致、繁殖性能强、毛皮品质好、早期生长快的特点。
The commission proposed allowing cloning only for practices such as saving species from extinction, making pharmaceuticals or breeding performance animals like racehorses or fighting bulls.
欧盟委员会提议，允许仅用于实验的克隆，如挽救濒危物种，制作药物或饲养表演动物，如赛马或斗牛。
Various approaches have been used to improve the performance of adapted indigenous stock, including cross-breeding and upgrading through back-crossing with improved breeds, and within-line selection.
已有多种方法被用于提高地方良种的性能，包括杂交育种，以及通过与良种的回交和品系内选育进行的品种改良。
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