| 连续自交对甘蓝型油菜(Brassica napus L.)胚胎发育的影响 |
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| 引用本文： | 孟金陵,刘后利.连续自交对甘蓝型油菜(Brassica napus L.)胚胎发育的影响[J].作物学报,1986,12(2):79-86. |
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| 作者姓名： | 孟金陵 刘后利 |
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| 作者单位： | 华中农学院农学系遗传育种研究室 |
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| 摘 要： | 以自由授粉群体和品系间杂种为对照,研究了甘蓝型油菜连续自交后代在胚胎发育上表现的效应。自交后代的胚和胚乳发育在授粉5天以后开始落后于杂交组,致使自花授粉的成熟种子较小,且含油率降低。与自由授粉相比,自交组花粉管生长较慢,受精较晚,胚乳游离核数较少,原胚生长缓慢。自交后代中常发生单受精、合子或幼胚退化以及游离核胚乳解体等异常现象,同时在受精频率、游离核数和原胚细胞数方面的变异系数,都较自由授粉组为大,表明至少在胚胎发育前期,连续自交后代甚至比处于杂合状况的自由授粉群体更不整齐一致。讨论了变异发生的原因及预测自交衰退和杂种优势的可能性。
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| 收稿时间： | 1985-03-02 |
THE EFFECTS OF SUCCESSIVE INBREEDING ON THE EMBRYO DEVELOPMENT OF BRASSICA NAPUS L |
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| Meng Jinling,Liu Houli.THE EFFECTS OF SUCCESSIVE INBREEDING ON THE EMBRYO DEVELOPMENT OF BRASSICA NAPUS L[J].Acta Agronomica Sinica,1986,12(2):79-86. |
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| Authors: | Meng Jinling Liu Houli |
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| Institution: | The Laboratory of Genetics and Plant Breeding; Department of Agronomy; Huazhong Agriculture College |
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| Abstract: | The effects of successive inbreeding progenies of Brassica napus L.on the embryo development were studied in comparison with the open-pollinated population and hybrids from inbred lines.5 days after polli-nation,the embryo and endosperm development in self-pollinat ed pro-genies began to fall behind crosspollinated treatment,causing smallerseeds and lower oil content in the self-pollinated ones.In contrast withopen-pollinated ones,there was a delayed growth of pollen tube,a laterfertilization,fewer free-nuc... |
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