| 水稻多胚苗的初步研究Ⅲ.来源与频率 |
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| 引用本文： | 刘向东,陈启锋,李维明,潘润森,林光霖,季彪俊.水稻多胚苗的初步研究Ⅲ.来源与频率[J].福建农林大学学报(自然科学版),1993(2). |
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| 作者姓名： | 刘向东 陈启锋 李维明 潘润森 林光霖 季彪俊 |
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| 作者单位： | 福建农学院作物遗传研究所 福州350002 |
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| 摘 要： | 选用水稻多胚材料 PM_1,通过胚胎学的观察,证实了多胚苗的形成途径有多条.将水稻多胚苗的形成途径归纳为4类10种。即(1)裂生多胚苗,包括合子胚和助细胞胚裂生;(2)增生多胚苗,包括合子胚、助细胞胚和不定胚增生;(3)混生多胚苗,包括合子胚+助细胞胚、合子胚+不定胚、助细胞胚+不定胚和合子胚+助细胞胚十不定胚混生:(4)双生多胚苗,即1个胚囊内同时具有2个不定胚.其中由合子胚增生、裂生或合子胚+助细胞胚是多胚苗形成的主要途径.在多胚苗组成中,二胚苗和三胚苗占绝大多数.
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| 关 键 词： | 水稻 多胚现象 无融合生殖 胚胎学 |
Preliminary Study of Polyembryony in Rice Ⅲ.Originatin and Frequency |
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| Liu Xiangdong Chen Qifeng Li Weiming Pan Runsen Lin Guanlin Ji Biaojun.Preliminary Study of Polyembryony in Rice Ⅲ.Originatin and Frequency[J].Journal of Fujian Agricultural and Forestry University,1993(2). |
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| Authors: | Liu Xiangdong Chen Qifeng Li Weiming Pan Runsen Lin Guanlin Ji Biaojun |
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| Abstract: | Reported in this paper was the embryological observation of PM_1 materials with higher fre- quencies of polyembryonic seedlings in rice.The results showed that polyembryonic seedlings were formed in various ways,which were divided into 4 groups,including 10 types:(1)The cleavage group,originating from splitting of zygotes or initial embryos(zygotic proembryo with two cells),synergid proembryos and adventi- tious proembryos;(2)The proliferation group,including prolification of zygotic proembryos,synergid proembryos and adventitious proembryos;(3)The mixed group,mixing growth of zygotic proembryos and synergid proembryos,zygotic proembryos and adventitious proembryos,zygotic proembryos,synergid proembryos and adventitious proembryos,and synergid proembryos and adventitious procmbryos;(4)Twin group,there are two adventitius embryos in a sac.Systematically analyzed here were the proportions of polyembryos,which could develop further into poly-seedlings,(the same below)with different sources and different numbers of polycmbryos in the population observed.Three thousand PM_1 ovaries with higher fre- quencies of polyembryos were observed.The results showed that 60.39% polyembryos were derived from zygotes or initial embryos,39.31% from synergid proembryos and 0.30% directly from adventitious proembryos.Of polyembryos,74.34% polyembryos were twin embryos,22.81% were triplet embryos and 2.85% were those with more than three embryos. |
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| Keywords: | rice polyembryony apomixis embryology |
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