摘要
利用2010—2012年江苏省杂交粳稻与常规粳稻区域试验数据,对新育成杂交粳稻与常规粳稻品种的主要品质性状及抗性进行比较分析。结果表明:杂交中粳的主要品质性状与常规中粳相比没有竞争优势,杂交晚粳的主要品质性状与常规晚粳相比具有一定的竞争优势;垩白度和垩白粒率在品种间的变异系数明显大于其它品质性状,是影响粳稻品质最重要的指标,也是制约江苏省杂交粳稻品质性状提高的主要因素;杂交粳稻对苗瘟、穗颈瘟、纹枯病的抗性总体优于常规粳稻,而对白叶枯病、条纹叶枯病的抗性弱于常规粳稻。江苏省杂交粳稻育种应加强稻米垩白度和垩白粒率的改良,重视综合抗病性的提高。
Based on regional trial data of japonica hybrid rice （JHR） and conventional japonica rice （C JR） in Jian- gsu Province from 2010 to 2012, the main grain quality traits and disease resistance performance of the new varie- ties were compared and analyzed between JHR and C JR. The results showed that the medium japonica hybrid rice （MJHR） was not superior to the conventional medium japonica rice（CMJR） while the late japonica hybrid rice （LJHR） had a certain superiority to the conventional late japonica rice （CLJR） in the main grain quality traits. The ehalkiness degree and chalky rice rate had much greater variation coefficients among varieties than the other grain quality traits, indicating that they have the most important effects on the grain quality of japonica rice, and are also the limiting factors in improving the grain quality of japonica hybrid rice in Jiangsu Province. On the whole, JHR had a better resistance to seedling blast, neck blast and sheath blight but a poorer resistance to bacterial leaf blight and rice stripe disease than C JR. The strategy for JHR breeding in Jiangsu Province would be strengthening the im- provement of the chalkiness degree and the chalky rice rate, and paying more attention to improving the multiple re- sistance to diseases.
出处
《杂交水稻》
CSCD
北大核心
2014年第6期68-72,共5页
Hybrid Rice
基金
江苏省科技支撑计划(BE2012307)
江苏省三新工程[sxgc(2013)097]
苏州市科技支撑计划(SNG201202,SNG201308)
关键词
杂交粳稻
常规粳稻
稻米品质
抗病性
比较分析
江苏省
japonica hybrid rice
conventional japonica rice
grain quality
disease resistance
comparative analy-sis
Jiangsu Province
