亚种间杂交稻协优9308的结实特性与生理基础

以比较生理学研究方法,研究亚种间杂交稻协优9308与品种间杂交稻协优63的籽粒灌浆特性.结果表明:灌浆成熟期亚种间杂交稻协优9308与品种间杂交稻协优63都有"粒间顶端优势"特性,亚种间杂交稻协优9308比品种间杂交稻协优63的"粒间顶端优势"更明显.但是,由于协优9308灌浆成熟期稻株生理活性高,支撑其劣势粒充实,优劣势粒的平均结

Seed Setting Characteristics and Physiological Bases of Subspecies Hybrid Rice Xieyou-9308

Grain filling characteristics of subspecies hybrid rice Xieyou 9308 was compared with that of Xieyou 63, and the apical grain superiority was observed in the two hybrids. The result suggested that the apical grain superiority was more obvious on Xieyou 9308 than in Xieyou 63. Xieyou 9308 plant showed higher physiological activity during its filling stage, and its seed setting rate in both spikelets of vigorous and subordinate was higher than that of Xieyou 63. The final grain yield of Xieyou 9308 was 11 t/hm 2. Some techniques such as "Lilibao" (GA 3 PP 333 ) was also experienced to increase root system activity and to delay stem senescence, as well as to increase seed setting rate.