有限结荚类型大豆初花期与成熟期主要性状的遗传与相关分析

ANALYSIS ON HNEREDITY AND CORRELATION OF TNEMAIN CHARACTERS IN INITIALFLOWERING STAGE AND MATURING STAGE IN DETERMINATE TERMINAL TYPE SOYBEAN

对两个大豆杂交组合Ｆ＿２代中选出的各１８个Ｆ３有限结荚型株系的初花期和成熟期主要性状的遗传力进行估算，对其相关性进行分析。结果表明，其遗传力大小依次为：成熟期株高＞生育日数，＞成熟期主茎节数＞初花期株高＞初花期主茎节数＞出苗至初花日数＞初花期初花节位＞单株总荚数＞单株粒重。出苗至初花日数、初花期初花节位、初花期主茎节数、初花期株高间彼此相关极显著，这些性状与生育日数、成熟期主茎节数，成熟期株高之间关系亦极密切。初花期和成熟期的上述主要性状与单株荚数和单株粒重的关系大多不显著。选育早熟，株矮的有限结荚型大豆与高产育种并不矛盾，可满足当地育种目标要求。

The heritabilities were estimated and the correlation were analysed in initial floweringstage and maturing stage of 18 F3 determinate terminal type soybean linesderived from twocrosses comination in F2 generation。 The results showed that theseuuence of heritabelity wasplant height at maturing stang> maturing stage > nods on main stemin maturing stage >ptant htight in initial flowering stage>nods on main stem in initial flowering stage>initialflowering stage>post of nods in initial flowering stage>total pods per plant>seed weightper plant.There was significant correlation among initial flowering stage,post of nods in ini-tial flowering stage,nods on main stem in initial flowering stage and plant height in initialflowering stage。There was close relation between these chracters and maturing stage,nodson main stem in maturing stage,plant heights in niaturing stage。There was no significantcorrelation between the main characters in initial flowering stage and maturing stage and to-tal pods per plant,seed weight per plant.Plant height ratios and lods ratios of main stem be-tween initial flowering stage and maturing stage were>0.7 and 0. 85 respectively. These in-dicated that breeding early maturing and short-stem soybean variety in the determinate ter-minal type could satisfy the high yield breeding.