摘要
胚乳退化继而诱发胚胎中途败育是导致‘塔１’无核芦柑突变体形成的主要原因．‘塔１’芦柑雌配子体初期发育正常，并能顺利完成授粉受精过程，胚胎能发育到球形胚、早心形胚．大约盛花期后２１～２４ｄ，‘塔１’芦柑的胚乳退化，诱发胚胎中途败育，而后胚胎逐渐消失或发育成瘪粒种子．‘塔１’芦柑雄配子体有某些异常．花粉生活力及发芽率偏低，扫描电镜观察到花粉变大且畸形花粉粒较多．授粉试验显示‘塔１’芦柑自交不亲和性较弱，授粉座果率介乎８．３３％～６２．５％．
Endosperm degenerated and then caused midway embryo abortion was the main reason which led to spontaneous mutation of ‘Tayi’ponkan. Female gamete of seedless mutant grew normally in early period and pollinted sucessfully,the embryo was able to grow to spherical or early cordate embryo. Endosperm of seedless mutant began to degenerate about 21～24 days after full-bloom period and induced the embryo abortion,then the embryo disappeared gradually or grew to be rudimentary seeds. Male gamete of seedless mutant was abnormal to some extent.The pollen viability and germinating percentage of the pollen were inclined to lower. Under the scanning electronic microscope,the pollen grains were bigger with more teratism ones. Pollination test showed that the self incompatibility of seedless mutant was lower and the percentage of setting fruit was between 8.33% and 62.5%.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
1998年第2期36-40,共5页
Journal of South China Agricultural University
基金
广东省科委"八五"重点攻关资助
