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《Journal of Northeast Agricultural University》 2000-04
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Varietal difference in panicle characteristics and their effects to percentage of ripened grains of Japonica rice in Heilongjiang province

LI Rong tian,CUI Cheng huan,JIN Xue yong,QIU Tai quan (Northeast Agricultural University,Harbin Heilongjiang,150030,PRC)  
The field experiment with 11 currently typical varieties or possibly super-high yielding strains developed recently in Heilongjiang Province was conducted under the high cultivation of Harbin to study varietal differences in panicle characteristics and their effects to percentage of ripened grains of Japonica rice.The results were as follows:The panicle types of tested varieties were divided into three categories,ie,first was that the superior part of distribution of the secondary branch grains on the middle panicle,second on the partial lower and third on the lower.The percentage of ripened grains of the secondary branch grains of the upper panicle was higher than those of middle which was further higher than those lower part.However,the lower percentage of ripened grains was generally on whole panicle and the variety in high percentage of ripened grains based on each part of panicle.The relaton between panicle type and percentage of ripened grains was not found.There was significantly negative relation of grains density on panicle with percentage of ripened grain within some range of density.It was suggested that super-higher yielding variety of Heilongjiang Province should have high percentage of ripened secondary branch grains on each part of panicle,lower grains density on parnicle,and lower position of panicle layer.$$$$
【CateGory Index】: S511.2+2;;S5-033
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