多胚水稻不定胚的起源及胚胎发育中的异常现象  

THE ORIGIN OF THE ADVENTITIOUS EMBRYO AND SOME UNUSUAL CASES OBSERVED IN THE DEVELOPING RICE EMBRYO

作　　者：姚家琳[1] 孙蒙祥[1] 李和平 蔡得田[1] 王灶安 

机构地区：[1]华中农业大学农学系,武汉430070

出　　处：《华中农业大学学报》1991年第3期233-237,T001,共6页Journal of Huazhong Agricultural University

摘　　要：对双13、双3、陆52和阿里希斯尼四个多胚水稻品系,进行胚胎学的研究,发现其无融合生殖中存在不定胚这种类型,而这种不定胚起源于二倍体的珠心细胞。观察中还发现多胚水稻胚胎发育中的几种异常现象,即大孢子四分体发育异常,双合子,心形胚,瘦长胚,胖芽胚等。并对反足细胞团块与不定胚进行了观察比较,二者在增殖方式及形态特征等方面均有本质区别。The polyembryony of four rice strains were investigated.Adventitious embryos derived from nucellar cells as found to be an important type of apomixis.Severalunusual phenomena were observed during the embryogenesis f olyembryonic rice,e.g.,megaspore tetrad asynchronous development,twin zygotes.“heart shape”embryo;leggy”embryo,etc.Foundamental differences in fission type and morphological characters wereobserved between the ntipodal cell group and the adventitious embryo.

关 键 词：水稻 多胚 无融合生殖 不定胚 胚胎 

分 类 号：S511.103.2[农业科学—作物学]