摘要
本文通过对BT和UP细胞质的3个不育系与4个恢复系配制的12个杂种,及其相应保持系杂种F2种子的加工和外观7项米质性状的表现型的比较表明,BT和UP细胞质对杂交粳稻的精米率、整精米率和垩白米率有明显的负效应,但对糙米率、糙米长、宽和长/宽比则没有影响,不育细胞质的这种负效应,具有很大的组合特异性,尤以恢复系的影响较大。胞质效应的变异占不育系杂种总变异的24~67%。
The comparison of 7 quality characters of F2 seeds related to milling and appearance propertgies was made between japonica rice hybrids of 3A lines with BT and UP cytoplasms ×4R lines, and their corresponnding B×R lines. The significant negative effects of BT and UP cytoplasms were found on percentages of milled, head and chalk rice. However, no significant effect was found on brown rice percentage and length, width and longth/ width of brown rice. The negative cytoplasmic effect varied clearly between crosses. particularly between the crosses with different restorers. The variation of cytoplasmic effect occupied 24-67% of that of A×R hybrids. It was concluded that the negative effect of cytoplasms on chalk rice percentage could be directly utilized and that on percentages of milled and head rice could be minimized by reasonable selection of A and R lines. It is also needed to exploit the new resources of cytoplasms.
出处
《杂交水稻》
CSCD
北大核心
1991年第3期41-44,共4页
Hybrid Rice
关键词
杂交稻
三系育种
稻米
品质
粳稻
Cytoplasmic effect
Rice grain quality
Japonica hybrid rice.