香粳不育系双百A的主要特性及其香味遗传

Main Characters of Aromatic Japonica Male—sterile Line“Shuangbai A”and Its Inheritance of Aroma

香粳不育系双百A属中熟晚粳型,其细胞质来源Chinsurah Boro Ⅱ(BT型细胞质),已回交20代,雄性不育性稳定,开花习性好,配合力强,米质优良,已实现三系配套并开始用于大面积生产;通过用1.7%KOH溶液浸泡叶片法分析其香味遗传,结果表明:香粳不育系双百A的香味由一对隐性基因控制,即其配制7杂种F_1代植株无香味,F_2代无香味与有香味分离比例为3∶1,并证实其不育细胞质对其香味遗传无影响。

Aromatic Japonica male-sterile line“Shuangbai A”is medium-maturity one maturiti-ng in autumn in Hangzhou,which possesses the male-sterile cytoplasm of cultivarChinsurah Boro Ⅱ and undergoes successive backcross twenty times.This male-sterile lineappears stable male sterility,a good habit of blossoming,strong combining ability,goodquality of grain.So far,we have bred some sets of three lines.These sets of three lineshave been applied to production of commercial rice By soaking the leal blade in solution of1.7% KOH,we analysed the inheritance of aroma of the malr-sterile line The resultsindieated the heritance of aroma in Shuangbai A″ is controlled by a pair of recessivenuclear gene,that is to say,its F_1 plants crossed are non-aromatic and the ratio of non-aromatic to aromatic in F_2 is 3:1.Also,.the experimemt cofirmed that the male-sterilecytoplasm doesn't affect aromatic inheritance.