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本试验用红外线二氧化碳分析仪研究了大豆不同类型亲本有性杂交后代叶片光合作用的遗传控制,以及叶片光合作用与某些植物学特征和性状之间的相关性。其主要结果如下:1、F_1表观光合速率(APR)表观明显差异,低光合作用在不同组合中存在不同程度显、隐现象。2、F_2 APE分散度很广,基本呈连续单峰曲线,APR遗传为数量遗传。3、F_2 APR广义遗传力为43—61％,故在F_2对APR选择是困难的。4、APR和比叶重、叶面积氮素、净光合生产率及结荚期叶绿素含量有密切正相关,可将其做为高光效育种选择APR的简易指标;试验还指出能够有意识通过选择提高APR;同时要把表观经济系数纳入高光效育种的选择指标。
In this study, we used infrared carbon dioxide analyzer to study the genetic control of leaf photosynthesis in sexual hybrid progenies of different types of soybean and the correlation between leaf photosynthesis and some botanical characters and traits. The main results are as follows: 1. Apparent apparent difference of F_1 apparent photosynthetic rate (APR), low photosynthesis in different combinations of different degrees of significant, hidden phenomenon. 2, F_2 APE dispersion is very broad, basically continuous unimodal curve, APR genetic quantitative genetic. 3, F_2 APR broad sense of heritability is 43-61%, so the selection of APR in F_2 is difficult. APR was positively correlated with specific leaf weight, leaf area nitrogen, net photosynthetic rate and chlorophyll content in podding stage, which could be used as a simple index to choose APR for high light efficiency breeding. The experiment also pointed out that APR can be consciously selected to improve APR At the same time, we should include the apparent economic coefficient into the selection index of high light efficiency breeding.