摘要
为探讨同源四倍体黄花菜部分不育和结实率低的原因，以同源四倍体黄花菜新品系ＨＡＣ－大花长嘴子花为材料，观察其花粉母细胞减数分裂行为．结果表明：在减数分裂不同时期出现异常现象，双线期和终变期见到四价体、三价体、二价体、单价体；中期Ⅰ，后期Ⅰ和末期Ⅰ均出现落后染色体，后期Ⅰ见到染色体桥和断片；中期Ⅱ，后期Ⅱ和末期Ⅱ有染色体不同步分离及不等分裂等现象；四分体时期还出现多分体以及多核现象．同源四倍体减数分裂不正常是造成四倍体黄花菜部分不育的细胞学原因．
In this paper the pollen mother cell meiotic behaviors and fertility of the autotetraploid “HacDahua Changzuizihua”were studied.The results iudicate:The pollen mother cell meiotic behaviors are abnormal.During diakinesis,tetrovalemts,trivalents bivalent and monovalents are observed;during first metaphase,first anaphase and first telophase, lagging chromosomes all appear,and during first anaphase chromosome bridges and fragments are observed;during second metaphase,second anaphase and second telophase chromosome segregation is not synchronous and equal;during tetrad stage,polysporous and polynucleate phenomenon appear.The abnormal meiosis of autotetraploid is the cytogenetic reason of partialsterility of autotetraploid of day lily.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
1998年第1期14-17,共4页
Journal of Hunan Agricultural University(Natural Sciences)
关键词
金针菜
同源四倍体
减数分裂
染色体
变异
day lily
autotetraploid
meiosis
chromosomes
variation(genetics)
