“十二五”四川省审定高产型中籼迟熟杂交稻经济性状及产量分析  

Analysis of Economic Characters and Yield of Mid-late Indica Hybrid Rice Approved by Sichuan Province in the 12th Five-year Plan

作　　者：杨扬[1,2] 况浩池 曾正明[1,2] 罗俊涛 陈光珍[1,2] 蒋钰东 何兴材[1,2] 付均 郑军[1,2] YANG Yang KUANG Haoehi ZENG Zhengming LUO Juntao CHEN Guangzhen JIANG Yudong HE Xingcai FU Jun ZHENG Jun(Rice and Sorghum Research Institute, Siehuan Academy of Agricultural Sciences/Key Laboratory of Southwest Rice Biology and Genetic Breeding, Ministry of Agriculture, Deyang, Sichuan 618000, China Luzhou Branch of National Rice Improvement Center, Luzhou, Sichuan 646100, China)

机构地区：[1]四川省农业科学院水稻高粱研究所/农业部西南水稻分子生物学与遗传育种重点试验室,四川德阳618000 [2]国家水稻改良中心四川泸州分中心,四川泸州646100

出　　处：《中国稻米》2017年第5期38-41,共4页China Rice

基　　金：四川省"十三五"水稻育种攻关项目(2016NYZ0028);四川省财政创新能力提升工程专项资金项目(2016ZYPZ-034);四川省农业科技成果转化资金项目(15NZ0003);德阳市科技成果转化项目(专项)(2014CNZ004)

摘　　要：对"十二五"期间四川省审定的51个高产型中籼迟熟三系杂交稻组合的经济性状和产量进行了分析,并研究了经济性状与产量间的相关关系。结果表明,这51个组合的平均有效穗数为13.89万/667 m^2、穗着粒数为176.87粒、结实率为80.99%、千粒重为29.52 g、稻谷产量为547.22 kg/667 m^2、增产率为5.36%。单产与有效穗数和增产率呈极显著正相关,与穗长、穗着粒、结实率和千粒重相关性均不显著;有效穗数与穗着粒数、千粒重呈极显著负相关,与穗长呈显著负相关;结实率与千粒重呈显著负相关。因此,在四川省这样的生态条件下,要进一步突破水稻产量水平,应在保持一定单穗质量的基础上,平衡协调穗、粒结构,适当增加有效穗数。针对不少品种结实率不高的问题,提出了提高新育杂交稻结实率的主要途径。The economic characters and yield of 51 three line hybrid rice varieties with mid-late maturity and high yield approved by Sichuan Province during the 12th Five-year Plan were analyzed, and the correlation between the economic characters and yield were studied. The results showed that the effective panicles per 667 m^2 was 138.9 thousand, grain number per panicle was 176.87, seed setting rate was 81.0%, 1 000-grain weight was 29.52 g, grain yield was 547.22 kg per 667 m^2 and rate of grain increase was 5.36%. The grain yield per unit area were extremely significant positive correlation with the effective panicles and the rate of yield increase, and not significantly related with panicle length, grain number per panicle, seed setting rate and 1 000-grain weight. The effective panicles were extremely significant negative correlated with grain number per panicle and 1 000-grain weight, and significant negative correlated with panicle length, and the seed setting rate was significant negative correlated with 1 000-grain weight. As the result, in order to achieve high grain yield, on the basis of maintaining suitable weigh of the panicle, we should build comprehensive balance of spike-grain structure, appropriately increase the effective panicles under the ecological conditions of Sichuan Province. Aiming at the problem of low seed setting rate of many varieties, the authors put forward the main ways to improve the seed setting rate of new hybrid rice breeding.

关 键 词：三系杂交稻 中籼迟熟品种 经济性状 

分 类 号：S511.21[农业科学—作物学]