Correlation research between rice quality traits and seed vigor in different types of rice cultivars
[Objective]The level of seed vigor is closely related to crop emergence performance,population quality,yield and quality potential.By studying the correlation between rice quality traits and seed vigor in different types of Oryza sativa cultivars,this research aims to preliminarily reveal the effect of seed vigor on rice quality,and screen out high-quality rice cultivars to provide guidance for agricultural production.[Method]12 conventional japonica rice and 12 hybrid indica rice cultivars were used as test materials to determine seed vigor and quality indexes such as brown rice rate,whole semolina rate,chalky whiteness,transparency,gel consistency,straight-chain starch quality fraction and protein quality fraction under different germination conditions,and analyze their differences and correlations to investigate the relationship between seed vigor and quality traits.[Result]There were significant differences in seed vigor and rice quality among different rice types and cultivars,and cultivars with excellent quality had significant advantages in brown rice rate,whole semolina rate,chalky whiteness,transparency and gel consistency.Among them,'Shennong 702''Shennong 9816''Liangyou 0367''Y-liangyou 900''Jingliangyou Huazhan'had germination indexes of 23.8-27.2,vigor indexes of 2.8-3.7,brown rice rates of 79.0％-82.7％,and whole semolina rates of 54.4％-66.0％,which had higher seed vigor and better quality compared with other rice cultivars.There was a significant positive correlation between rice quality and vigor index,in which the correlation between the whole refined rice rate and vigor index reached a significant level in both conventional japonica and hybrid indica rice.[Conclusion]Rice cultivars with high seed vigor have better rice quality.Considering all the indexes,'Shennong 9816''Shennong 702''Liangyou 0367''Jingliangyou Huazhan''Y-liangyou 900'can be promoted for cultivation and application.[Ch,4 tab.32 ref.]
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