| 海岛棉半配生殖品系有性过程的胚胎学观察 |
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| 引用本文： | 张海洋,张天真.海岛棉半配生殖品系有性过程的胚胎学观察[J].作物学报,1996,22(2):156-160. |
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| 作者姓名： | 张海洋 张天真 |
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| 作者单位： | 南京农业大学农学系，江苏南京，210095 |
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| 基金项目： | 高等学校博士学科点专项科研基金 |
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| 摘 要： | 半配生殖品系ＶＳｇ自交或以ＶＳｇ作母本与海岛棉标准系３－７９杂交，花粉能在柱头上萌发，花粉管能在花柱组织中生长并能进入胚珠到达胚囊。精核与极核融合、初生胚乳核分裂，以及胚乳游离核形成均表现正常，但精卵融合不同于３－７９。突出表现在一部分胚囊中，进入卵细胞的精核迟迟不与卵核融合，未融合的二核（♀＋♂）“合子”经过一段比３－７９稍长些的“休眠期”后，各自独立分裂，形成各种类型的嵌合胚。
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| 关 键 词： | 海岛棉 半配生殖 有性过程 胚胎学 嵌合体 棉花 |
| 收稿时间： | 1994-07-12 |
Embryological Investigation of Sexual Process of Semigametic Line in Gossypium barbadense L. |
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| Zhang Haiyang,Zhang Tianzhen,Pan Jiaju.Embryological Investigation of Sexual Process of Semigametic Line in Gossypium barbadense L.[J].Acta Agronomica Sinica,1996,22(2):156-160. |
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| Authors: | Zhang Haiyang Zhang Tianzhen Pan Jiaju |
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| Institution: | Department of Agronomy,Nanjing Agricultural University,Nanjing,210095 |
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| Abstract: | When Semigametic line VSg was selfed or crossed as female parent with Sea Island Cotton standard line 3-79, the pollens can germinate on the stigma, and the pollen tubes can penetrate into the style tissue, enter ovule and finally go into the embryo sac. The sperm nucleus fuses with the two polar nuclei forming primary endosperm nuclei, which divide and form free endosperm nuclei normally. However, the sperm nucleus entering into egg cell doesn't fuse with the egg nucleus lingeringly in some embryo sac. The unfused binuclear ((?) (?) )"zygote"has a longer "quiescent stage"than that of 3-79. Afterwards, it divides independently and produces different kinds of chimeras. |
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| Keywords: | Gossypium barbadense L Semigamy Sexual process Embryology Chimera |
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