抗线大豆品种生育期结构与百粒重、产量间的相关研究

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

选取33份抗线大豆品种(系)分成早熟、中熟、晚熟3组进行生育期结构与百粒重、产量的相关性分析。结果表明:(1)随着生育期的延长生育前期所占的比例缩小,生育后期所占比例增加;越晚熟类型的品种百粒重、产量越高;(2)早熟、中熟品种间生育阶段与百粒重、产量相关不显著,晚熟品种生育期与小区产量呈显著正相关,结荚鼓粒持续时间与百粒重、小区产量均显著正相关;(3)总体样本内全生育期、生育后期对小区产量、单株产量的相关均达到显著水平,其中全生育期与小区产量相关系数最大,为0.496 7;(4)生育后期与百粒重的相关系数最大,达到显著水平,为0.409 4。综上可知,全生育期、生育后期是影响百粒重和产量的主要因素。

Thirty-three soybean cyst nematode（ SCN ）resistant soybean varieties（lines） were divided into early, mid and latematuring groups and correlations among growth stage structure, 100-seed weight and yield were analyzed. The results indicated that,（i）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;（ii）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 ; （iii）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;（iv）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.