摘要
利用2001—2008年云南省粳稻区域试验数据，分析了云南省粳稻新品系产量及其结构与对照品种产量及其结构差异变化。分析显示，云南省新育成品系产量总的趋势是增加，但与对照比，产量增加幅度不大，产量差异中部在359．25—850．95kg／hm2，中北部在141．7～927．5kg／hm2，影响其产量差异的主要结构因素是总颖花数、结实率和千粒重，其次是群体结构。千粒重不易受环境条件影响，比较稳定，变异小，遗传性强，提高千粒重是提高产量的一条有效途径。相关性分析也显示，产量与总粒数、结实率和千粒重成显著正相关，单位面积穗数确定后，穗粒数成了产量构成中的决定因素。本研究为进一步提高单产育种和培育突破性品种提供了理论依据。
Yield and yield components of Japonica rice varieties （lines） were analyzed according to data of Yunnan regional yield test from 2001 to 2008. The result showed thmt yield trend of new varieties （lines） was increased, yield difference between new lines and check variety kept with 359.25 - 850.95 kg/hm2 in middle area of Yunnan, 141.7 - 927.5 kg/hm2 in middle-noah area of Yunnan. Yield components that affected yield improving were grain number and seed setting rate as well as population structure,inheritance of 1000-grain weight were independent and relative stability,so improving 1000-grain weight could get high yield. Correlationship between yield components and yield showed that there was great difference between yield and yield components including grain number, seed-setting rate and 1000-grain weight.
出处
《西南农业学报》
CSCD
北大核心
2010年第2期304-308,共5页
Southwest China Journal of Agricultural Sciences
基金
云南省"十一五"重点攻关项目(2006NG04)
关键词
云南省
粳稻品种
产量结构
Yunnan province
Japonica rice varieties
Yield components
