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- Title
豫南稻区机直播单季中籼杂交稻丰产优质品种筛选.
- Authors
张 静; 詹俊辉; 任 翠; 杜彦修; 李俊周; 孙红正; 彭 廷; 赵全志
- Abstract
In order to screen single cropping mid-season indica hybrid rice cultivars which had high quality and yield,and were suitable for mechanical direct seeding in south Henan,41 cultivars of mid-season indica rice were used to analyze the difference of the growth duration, grain yield and its components, rice grain quality .disease resistance, lodging resistance, dry matter accumulation and transport, canopy temperature and canopy-air temperature difference. The results showed that 41 cultivars of mid-season indica rice were divided into 5 clusters according to the main agronomic traits. Compared with other clusters, cluster III rice cultivars had higher grain yield and grain number per panicle, the grain yield was 11 081.28 kg/hm2,the grain number per panicle was 169. 72, respectively; the growth duration of cluster IV rice cultivars was significantly lower, and there was no significant difference among the other clusters; cluster TIT rice cultivars had higher head rice rate and lower chalkiness and chalky rate,the head rice rate was 49. 70%, the chalkiness was 5.40%, and the chalky rate was 19. 98%. Except rice blast and rice blight of the cluster I rice cultivars were heavier,the proportions of susceptible cultivars to the total cultivars of other clusters were all lower than 10. 00%. Only the cluster I appeared lodging. The canopy temperature affected effective panicle number of cluster I, II, III, V rice cultivars, which was significantly negatively correlated with effective panicle number of cluster I, II, TTT rice cultivars, and significantly positively correlated with effective panicle number of cluster V rice cultivars. The difference of canopy-air temperature mainly affected rice grain chalkiness and chalky rate of cluster II, IV and V rice cultivars, which was negatively correlated with chalkiness and chalky rate of cluster II and IV rice cultivars, and significantly positively correlated with chalkiness and chalky rate of cluster V rice cultivars. The harvest index of cluster IIT rice cultivars was significantly higher than those of cluster II . V rice cultivars, and there was no significant difference between the cluster I and cluster IV rice cultivars. From these results, a total of 6 rice cultivars with high quality and yield of cluster III selected from 41 cultivars were suitable for mechanical direct seeding in south Henan, which were Qianyou 930, Guangliangyou No. 5, Yliangyou No. 2, Yliangyou 900, Quanzaoyousimiao, Xinliangyou 611, these cultivars had high grain number per panicle, grain yield, head rice rate, harvest index, low chalkiness and chalky rate, moderate growth duration, good resistance to disease.
- Publication
Journal of Henan Agricultural Sciences, 2018, Vol 47, Issue 10, p12
- ISSN
1004-3268
- Publication type
Article
- DOI
10.15933/j.cnki.1004-3268.2018.10.003