杂交稻I特优3381特征特性与主要经济性状研究

Study on the Characteristics and Major Economic Traits of I-Tryou3381

[目的]揭示主要经济性状对杂交稻I特优3381产量的影响规律。[方法]采用通径、相关、回归分析方法,对I特优3381产量及主要经济性状进行统计分析。[结果]有效穗、实粒数、千粒重等3个因素与产量关系密切;产量构成4个因素与产量均呈正相关,有效穗与产量呈极显著相关水平,有效穗与每穗总粒数呈负相关,但不显著;4个产量构成因素的直接通径系数的大小依次为:实粒数(P5=0.809 7)>有效穗(P3=0.643 1)>千粒重(P7=0.581 3)>总粒数(P4=0.118 5)。[结论]在I特优3381栽培过程中应主攻有效穗数和每穗实粒数,协调好穗粒关系,以达到增产的目的。

[Objective]The paper was in order to reveal the effects of the characteristics and main economic traits on yield of I-Tryou3381. [ Method]The characteristics and major economic traits of I-Tryou3381 were analyzed by statistical methods such as correlation analysis,path a- nalysis and regression analysis. [ Result ] The result showed that the main factors such as the effective panicle number, total grains number and 1 000 grain weight were closely associated with production. Path analysis showed that direct path coefficient of four yield components： grains number（P5 = 0. 809 7 ） 〉 the effective panicle number （ P3 = 0. 643 1 ） 〉 1 000 grain weight （ P7 = 0 581 3 ） 〉 total grains number （ P4 = 0. 118 5）. [ Conclusion] Effective spike number per plant and the effective panicle number should be focused to increase the yield of I-Try- ou3381.