The yield of soybean is positively correlated with the duration of reproductive growth,which delays the aging of leaves after flowering,enhances their physiological performance,and supports growing plants with heavier grains.Leaf yellowing is one of the distinctive features of plant aging.Studies on leaf yellowing at the late stage of soybean drum grain have rarely been re-ported.The early yellowing feature of soybean late tympanic leaves was controlled by a single recessive nuclear gene,according to the genetic analysis of the hybrid of the early yellowing mutant ly and wild-type ofc in this study.Using Molecular Marker to Map-Based Cloning,a 2.23 Mb preliminary localization interval on chromosome 19 was obtained.The interval was shortened to 1.75 Mb and contained 219 genes.When this interval was combined with RNA-Seq analysis,12 candidate genes were detected,including 4 SNP variant genes and 8 differentially expressed genes.The findings of this study provides the framework for the cloning of genes that cause aging and yellowing during the filling later period in soybean.
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