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作 者 ：樊路;R.Morris

期 刊 ：作物学报 1986年 12卷 01期 页码：21-30

关键词：普通小麦；

摘 要 ：首次对中国北部品种同源转化群5单体单价体错分裂及单双极分布进行了研究。单体5A、5B 和5D 减数分裂后期Ⅰ错分裂频率分别为14.2%、9.2%和9.1%。中国春5A 具有最高错分裂频率(40.0%)。单体染色体或它们的错分裂产物的单极分布频率从18.6%到36.7%。双极分布频率比单极分布频率高,并随错分裂产物的增加而增加。一次、二次、三次错分裂频率差异很大。与欧、美品种相比中国北部品种同源转化群5错分裂行为与日本品种更相似。

Abstract:Misdivisions and polar distributions of wheat monosomes 5A,5B,and 5D from nine north Chinese cultivars were determined in F_1 plantsfrom crosses between Chinese Spring group 5 monosomics and eachof the Chinese cultivars.The frequencies of anaphases Ⅰ cells with mis-divisions were 14.2% for 5A,9.2% for 5B,and 9.1% for 5D,withsignificant differences among chromosomes,cultivars,and chromosome-cultivar interactions.Chinese Spring 5A in its own background had thehighest misdivision rate(40%).Misdivision rates we...

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