生育期结构不同的大豆品种的光周其反应和农艺性状

分别选用成熟期相近、开花期不同及开花期相近、成熟期不同的南方春、夏大豆品种，研究了生育期结构与开花前、后光周期反应敏感性的关系。结果表明，大豆品种生育前、后期长短与它们在该期的光周期反应敏感性正相关。在生育期相近的前提下，前期长度与开花促进率（ＦＨＲ）、后期长度与成熟促进率（ＭＨＲ）正相关；开花期相近的品种，后期长度与ＭＨＲ值正相关。部分品种不符合以上趋势，反映出上述相关的复杂性。在生育期相近的南

Photoperiod Response and Agronomic Characters of Soybean Varieties with Different Growth Period Structures

In this study, the relationships among growth period structure, pre-/post-flowering photoperiod response sensitivity (PRS) and agronomic characters of soybean varieties(collected from south China) with similar maturity dates but different flowering dates or withsimilar flowering dates but different maturity date were studied. The results showed that thelength of pre- or post-flowering period was positively correlated to PRS in the respective stage.Among the varieties with similar flowering dates, the length of reproductive period was positivelycorrelated to the maturity hastening rate (MHR). Some varieties did not accord with the rulementioned above, indicating that the relationship was complicated. When maturing at the similardates, the spring- or summer-sown varieties with longer vegetative period had more seeds andhigher yield per plant, and the varieties with longer reproductive period had higher 100-seedweight, lower seed number and yield per plant. Among the summer-sown varieties with similarflowering dates, the varieties with longer reproductive period had higher 100-seed weight. Inspring-sown varieties from south China, no significant correlation between the reproductive period and agronomic characters was found.