摘要
研究结果表明,高产杂交水稻有较多的^(32)P和^(14)C积集在分蘖和孔熟期的稻穗中,杂交水稻F_1乳熟期同化的^(14)C-葡萄糖向稻穗输送的百分率高。观察发现,杂交稻谷粒产量与^(14)C-葡萄糖在稻穗中分布及与IAP(输入积)之间的相关性高。低产杂交稻没有上述特性。放射性同位素^(32)P、^(14)C在分蘖和稻穗中的分布可作为预测杂交水稻F_1谷粒产量的指标。
Relationship between grain yield and 32P,14C distribution in tillers and panicles of F1 hybrids and their parents was studied under greenhouse condition through tracing methods with materials of 56 F1 hybrids crossed by various cytoplasmic male sterile lines (CMSL) and their parents.The CMSL were WA,HL,DI,DA,B and Sinica rice hybrids type.The results showed that in F1 hybrids with high grain yield (HGY) 32P and 14C were concentrated in its tillers and panicles at milky stage,in which the 14C-glucose metabolite percentage exported from flag leaf topanicle of F1 was rather high.A close relation was observed between grain yield and 14C-glucose assimilate distributed in panicle,and IAP (14C exported (%)×14C accumulated in panicle (%)/100).But this feature was not showed in some.F1 rice hybrids with low grain yield (LGY).The tracers of 32P,14C distributed in tillers and panicles can be used to predict heterosis in grain yield of F1 rice hybrids.
出处
《核农学报》
CAS
CSCD
1992年第4期219-224,共6页
Journal of Nuclear Agricultural Sciences
关键词
水稻
分蘖
穗
磷32
碳14
产量
Hybrid rice F1,heterosis in grain yield,32P,14C
