杂交晚籼新组合“荣优225”的选育及高产原因分析  

Breeding of New Indica Hybrid Rice Combination Rongyou 225 and Analysis of the Reasons for Its High Yield

作　　者：蔡耀辉[1] 聂元元[1] 颜龙安[1] 李永辉[1] 颜满莲[1] 毛凌华[1] 

机构地区：[1]江西省农业科学院水稻研究所/国家水稻改良中心南昌分中心,江西南昌330200

出　　处：《江西农业大学学报》2010年第5期876-880,共5页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家科技部成果转化项目(2010GB2C500229);国家水稻产业技术体系岗位科学家项目(2008-2012年)

摘　　要："荣优225"是江西省农科院水稻所选育的高产杂交水稻新组合,2007—2008年在江西省区试中2年平均单产7016.25kg/hm2,比对照"金优207"增产6.56%;2009年在南方稻区区试中平均单产7602.75kg/hm2,比对照"金优207"增产8.46%。米质达国优2级,且稻瘟病抗性和稻米品质均优于对照,2009年3月通过江西省品种审定。该组合高产的原因:一是在生育期适当延长的基础上显著提高日产量;二是单位面积穗数和单穗重的协同增加,其中以单穗重的贡献率更大,单穗重的提高主要是每穗总粒数的增加所致。最后还对杂交水稻超高产育种进行讨论。Rongyou 225（RongfengA/R225） is a new high-yielding hybird rice combination developed by the Rice Research Institute of Jiangxi Academy of Agricultural Sciences.In Jiangxi provincial regional trials in 2007 and 2008,it yielded 6.56% higher than the check hybrid Jinyou 207 on average,and in the Southern China rice growing region national trial in 2009,it yielded 8.46% higher than the check hybrid Jinyou 207 on average.It had also better blast resistance and grain quality than the control,and the rice grain quality reached the second grade standard of national good quality rice.In the March of 2009,it was registered and released to commercial production by Jiangxi Provincial Crop Variety Appraisal Committee.The reasons for its higher yield were：1） its higher daily grain yield based on a suitable longer maturity;2） the consonant increase of both grain weight per panicle and panicles per unit area with a greater contribution to yield from the former,resulting mainly from its spikelets number per panicle.The approach to breeding super rice was also discussed in this paper.

关 键 词：杂交水稻 荣优225 选育 高产原因 

分 类 号：S513[农业科学—作物学]