杂交稻及其恢复系的强弱势粒对光合物质摄取能力的比较  

THE ABSORPTION ABILITY FOR CARBOHYDRATE BETWEEN VIGOROUS AND WEAK SPIKELETS IN HYBRID RICE AND ITS RESTORERS

作　　者：王熹[1] 陶龙兴[1] 田淑兰[1] 黄效林[1] 俞美玉[1] 

机构地区：[1]中国水稻研究所,浙江杭州310006

出　　处：《核农学报》2000年第2期76-84,共9页Journal of Nuclear Agricultural Sciences

基　　金：农业部"八五"重点项目!(农 85 0 8 0 2 0 3 0 2 );浙江省"九五"攻关项目!(96110 2 15 )

摘　　要：本研究选用杂交稻三组合及相应恢复系作为供试材料 ,分田间试验及盆栽试验两部分。结果表明 ,杂交组合及其相应恢复系的籽粒对标记储藏物质及标记光合物质的吸收分别达到 50 %和 80 % ,杂交组合籽粒的吸收量高于相应的恢复系 ,但差异不大 ,说明在储藏物质与光合产物的运输方面 ,杂交组合比相应的恢复系之间无明显差别。但是 ,杂交组合与相应恢复系的强弱势粒对标记储藏物质与光合物质的摄取量之间存在明显差异 ,强势粒是弱势粒吸收量的数倍乃至数十倍 ,尤其是杂交组合的强势粒对标记光合产物的摄取能力远高于弱势粒。杂交稻及其恢复系在物质分配方面表现出强势粒对弱势粒的粒间顶端优势 ,杂交组合比相应恢复系的粒间顶端优势表现更为明显。强势粒对弱势粒物质摄取能力的优势 ,可能是杂交稻籽粒结实率低下的重要原因之一。Some hybrid rice combinations and their restorers,Ⅱyou2070(Indica/Indica) and its restorer2070,Shuangyou23(Japonica/Japonica) with its restorer 91\|23,sub\|species hybrid rice Xieyou 413(Indica/Japonica) with its restorer Zhong 413, were selected as rice material and planted in pot and field to study the differences of absorption ability for labeled carbohydrate between vigorous and weak spikelets, and to demonstrate the phenomenon of “inter\|grain apical dominance” in rice. It was shown that the absorbing rate of hybrid rice and it restorer for store material and for photo\|material was 50% and 80% respectively, and the absorbing rate of hybrid rice was a litter higher than that of its restorer. However, there was a big difference between vigorous spikelets and weak spikelets in the absorbing ability for carbohydrate. The absorbing amount of vigorous spikelets was 10 times higher than that of the weak spikelets, especially in hybrid rice combinations. It was also observed that the “inter\|grain apical dominance” in hybrid rice was stronger than its restorer, which might be one of the main reasons for low seed setting in hybrid rice combination.

关 键 词：杂交稻 强势粒 弱势粒 粒间顶端优势 ^3H-葡萄糖 

分 类 号：S511.101[农业科学—作物学]