两个亚种间杂交稻新组合干物质积累及分配研究  

Study on Accumulation and Distribution of Dry Matter in Two Intersubspecific Hybrid Rice Combinations

作　　者：刘玉龙[1] 邓应德[1,2] 周飞捷[1] 邓晓娟[1] 肖层林[1] 

机构地区：[1]湖南农业大学农学院,湖南长沙410128 [2]湖南杂交水稻研究中心,湖南长沙410125

出　　处：《农业现代化研究》2011年第3期348-351,共4页Research of Agricultural Modernization

基　　金：国家科技支撑计划项目(编号:2007BAD77B04);湖南省学位与研究生教育教学教改研究课题(编号:08B21)

摘　　要：以籼粳亚种间杂交稻新组合"培矮64S/R292"、"Y58S/R292"为材料,并以籼籼交超级杂交稻"丰源优299"为对照,研究了干物质积累和分配规律及其与产量的相关性。结果表明:3个供试组合生育前期干物质积累量与稻谷产量相关性不显著,齐穗期和成熟期干物质积累量与每穗总粒数、每穗实粒数及产量显著正相关,干物质的积累量与同期叶面积指数显著相关。"培矮64S/R292"、"Y58S/R292"生育后期叶面积指数和干物质积累速率显著大于"丰源优299",茎杆物质输出速率低于"丰源优299"。因此,亚种间杂交组合在保证后期干物质积累量的前提下,提高干物质的转化率,改善"流"的畅通程度,是进一步提高亚种间杂交组合产量的重要途径。The two intersubspecific hybrid combinations Peiai 64S/R292 and Y58S/R292 were studied on their accumulation and distribution of dry matter and it＇s correlation with grain yield by use super hybrid variety Fengyuanyou 299 as check.The results showed follow： there is no observably difference in the relately between the accumulating of dry mater weight and grain yield on prophase.The accumulating of dry mater weight in the full heading stage and the maturing stage were significantly positive with the spikelets per panicle（SPP）,filled grains per panicle（FGPP） and grain yield.There were notable the correlation between the dry mater weight and LAI（leaf area index） in same stage.The results indicated that in later stage,leaf area index and dry matter accumulation rate for Peiai 64S/R292,Y58S/R292 were increased than Fengyuanyou 299 in the stage,while stem material output rate were below than Fengyuanyou 299.Therefore,based on ensuring the accumulation of dry matter in later stage in intersubspecific hybrid rice,to improve the dry matter of conversion rate,and to improve＂flow＂ unblocked degree is an important way to get high-yield in the intersubspecific hybrid combinations.

关 键 词：亚种间杂交稻 干物质积累量 叶面积指数 相关性 

分 类 号：S334[农业科学—作物遗传育种]