连续自交对甘蓝型油菜(Brassica napus L.)胚胎发育的影响

作物学报 ›› 1986, Vol. 12 ›› Issue (02): 79-86.

连续自交对甘蓝型油菜(Brassica napus L.)胚胎发育的影响

孟金陵;刘后利

华中农学院农学系遗传育种研究室

收稿日期:1985-03-02 修回日期:1900-01-01 出版日期:1986-05-12 网络出版日期:1986-05-12

THE EFFECTS OF SUCCESSIVE INBREEDING ON THE EMBRYO DEVELOPMENT OF BRASSICA NAPUS L

Meng Jinling,Liu Houli

The Laboratory of Genetics and Plant Breeding; Department of Agronomy; Huazhong Agriculture College

Received:1985-03-02 Revised:1900-01-01 Published:1986-05-12 Published online:1986-05-12

摘要/Abstract

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。

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(02): 79-86.

Meng Jinling;Liu Houli. THE EFFECTS OF SUCCESSIVE INBREEDING ON THE EMBRYO DEVELOPMENT OF BRASSICA NAPUS L[J]. Acta Agron Sin, 1986, 12(02): 79-86.

参考文献

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed