普通番茄四倍体与二倍体杂交的杂种不育性研究  

Studies on Cross-sterility Between 2X and 4X in Lycopersicun esculentum mill

作　　者：申书兴[1] 邹道谦[1] 

机构地区：[1]河北农业大学园艺系,保定071001

出　　处：《Acta Genetica Sinica》1991年第6期520-524,共5页

摘　　要：以普通番茄的四倍体为母本与二倍体杂交时,花粉萌发、花粉管生长及双受精过程都正常;对受精的胚珠形态结构观察得知:4天前幼胚和胚乳发育正常,授粉后4天胚乳出现异常开始退化,5天时这种异常现象更明显,第7天胚乳已完全解体。幼胚在胚乳完全解体前发育正常,而胚乳解体后,幼胚也开始解体。所以普通番茄二倍体与四倍体杂交的杂种不育的原因,在于胚乳败育以及胚的死亡。The germination of pollen grains on the stigma and the growth of pollen tubes in the style and the entry of pollen tubes into the micropyles in 4X×2X are in a fairly normal manner when compared with controls 2X × 2X. The percentages of pollen tubes entering ovules of the crosses 4X × 2X and the control 2X×2X had no significant difference. Fertilization was normal in cross pollinated ovules. The ovules of 2X × 2X, 4X × 4X, 4X × 2X were studied to determine the sequence of events leading to embryo and endosperm deterioration in 4X×2X ovules. On the 3rd day after pollination, the 4X × 2X showed no signs of abnormality. Endosperm deterioration was the first indication of anatomical abnormality. The endosperm was disintegrated totally by the 7th day after pollination. Deterioration of both the 4X × 2X embryo and the cells of proliferated endothelium was complete by 23 days. Therefore it might be concluded that the sterility of crosses between diploid and tetraploid was primarily attributed to the abortion of hybrid endosperm.

关 键 词：番茄 四倍体X二倍体 杂交不育 

分 类 号：S641.203.2[农业科学—蔬菜学]