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Study on flowering behavior and crossbreeding of 8 alfalfa .

8种苜蓿的开花习性及苜蓿杂交的研究。

Crossbreeding , bear no resemblance to their wild forebears .

杂交育种，承担任何义务极为相似，其野生祖先。

Reproductive performance and crossbreeding application of the haimen goat .

海门山羊多胎繁殖性能和改良利用的研究。

A plant or animal produced by crossbreeding ; a hybrid .

杂种杂交而生成的植物或动物；杂种。

Hybrid rice is any genealogy of rice produced by crossbreeding different kinds of rice .

杂交水稻，其主要思想是利用水稻的雄性不育来实现水稻的杂交。