摘要
本文利用普通小麦品系“中国春”(对照 )、中国春 ph1b突变体分别与八倍体小黑麦、六倍体小黑麦杂交 ,杂种F1的减数分裂前期Ⅰ染色体行为表现异常 ,中期Ⅰ出现较多的单价体、棒状二价体和多价体 ,在后期和末期出现落后染色体、染色体片断和微核。原因是 ph1b基因的存在造成染色体联会机制紊乱 ,致使一些部分同源染色体配对并发生互换 ,有可能在以后的世代产生染色体易位与基因重组。
Cytological irregularities was observed during meiosis in hybrid F1 of crossing common wheat 'Chinese Spring' ph1b mutant with octoploid or hexaploid triticale. More univalents, heteromorphic bivalents and multivalents were observed in PMCⅠ, and lagging chromosomes, chromosomal fragments and micronuclei in anaphaseⅠ and telophaseⅠ. The disorder of chromosome synapsis resulted in homoeologue pairing and exchanging,leading to translocation and recombination between nonhomologous chromosomes.
出处
《木本植物研究》
CSCD
北大核心
2000年第1期99-103,共5页
