Abstract:

In order to promote the breeding of early japonica rice with high quality in cold region, the main agronomic traits and quality traits of the early japonica rice germplasm resources were analyzed. The results showed that plant height and eating score was significantly negative correlation, increased inverted one and three internode thickness of rice could improve milling quality and appearance quality. The leaf base angle has great influence on quality traits, reducing leaf base angle could increase the milling quality, appearance quality and taste score. The characters of panicle have the great influence on milling quality, which was positively correlated. There was significant negative correlation between the seed setting rate of primary branch and secondary branch and appearance quality.

Key words: cold region, early japonica rice, agronomic traits, quality traits, correlation analysis

摘要：

为促进寒地优质早粳稻育种工作，对205份寒地早粳稻种质资源主要农艺性状和品质性状进行了相关分析。结果表明，株高与食味评分呈显著负相关，增加倒1、倒3节间粗可提高稻米碾磨品质，同时改善外观品质；叶基角对品质性状影响较大，叶基角越小，叶片越直立，会提高稻米的碾磨品质、外观品质及食味评分；穗部性状对碾磨品质影响较大，呈显著正相关；一次枝梗和二次枝梗结实率对外观品质影响较大，呈显著负相关。

关键词: 寒地, 早粳稻, 农艺性状, 品质性状, 相关分析