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jia xu yuan yuan za jiao bu yu ji zhi de tan tao
Author(s): 
Pages: 90
Year: Issue:  3
Journal: China Yak

Keyword:  形成过程初级精母细胞染色体数目塞托利细胞杂种不育精细管远缘杂交次级精母细胞精子印度野牛;
Abstract: <正> 本文(综述)介绍了家畜远缘杂交中杂种不育的机制;杂交不亲和的机制,遗传工程和家畜远缘杂交三部分内容。其中黄牛×牦牛杂种公牛不育,据(1960)和(1969)氏报道,公犏牛的精子形成过程在初级精母细胞阶段、间或在次级精母细胞阶段中止;从睾丸病理来看,精原细胞有退化现象,精细管充塞着许多塞托利细胞(Sertoli细胞,即精细管上皮营养细胞)和间质细胞。牦牛的染色体数目、类别和黄牛相同;氏认为,由于两个
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