Abstract

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Title:: Correlations among Growth Stage Structure，100-seed Weight and Yield of Soybeans Resistant to SCN

Author(s):: ?DU Zhi-qiang; ?(Daqing Branch of Heilongjiang Academy of Agricultural Sciences，Daqing 163316，China)

Keywords:: Resistant variety to SCN; Construction of growing stage; 100-seed weight; Yield; Correlation

Abstract:: ?Thirty-three soybean cyst nematode(SCN)resistant soybean varieties(lines)were divided into early，mid and latematuring groups and correlations among growth stage structure，100-seed weight and yield were analyzed.The results indicated that，Early growth stage percentage decreased and later growth stage percentage increased，with the whole growth stage increasing;The later maturing type had the higher 100-seed weight and yield;The early maturing varieties，medium maturing varieties between growth stages and 100-seed weight，yield was not notable, and the whole growth stage of latematuring varieties was significantly positively correlated with yield per plot，R4-R6 was significantly positively correlated with 100-seed weight and yield per plot;In ensemble of varieties，the whole growth period，the later growth stage was significantly positively correlated with yield per plot，correlation coefficient between seed weight per plant and yield per plot was the largest，up to 0.496 711;The correlation coefficients between later growth stage and 100-seed weight was the largest，which was 0.409 401.In a word，the days of whole growth and later growth stage were the most important factors affecting yield and 100-seed weight.