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小麦×节节麦杂种发育的胚胎学研究
丁春邦; 周永红;   
四川农业大学基础部
摘要:
用石蜡切片法,对小麦经节节麦花粉授粉后不同时间固定的子房进行了细胞胚胎学观察。结果表明,节节麦花粉在小麦柱头上萌发良好,花粉管可顺利长入花柱和胚囊。观察的238个小麦子房中,1050%发生了双受精,产生了胚和胚乳;462%发生了单卵受精,只产生胚而无胚乳;378%发生了单极核受精,只产生胚乳而无胚;总受精率为1890%;成胚率为1512%。本文还报道了小麦与节节麦远缘杂交时雌雄性核的结合及杂种胚和胚乳的发育情况,探讨了小麦与节节麦杂交结实率低在胚胎学方面的原因
关键词:  小麦  节节麦  远缘杂交  受精  胚胎发育  
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