Project description:CGH was used to map structural variation (introgressed regions) among soybean iron-inefficient NIL IsoClark with its iron-efficient recurrent parent Clark and donor parent T203. Another NIL series HiPro, LoPro was also used in the study.
Project description:Flowering time is a critical trait to determine regional adaptation and yield of crops including soybean. Evening Complex (EC) components soybean LUX1, LUX2, and ELF3a are critical for flowering and adaptation to lower latitudes. However, the mechanisms of EC in regulating flowering time remain largely unclear in soybean. Here, we identified GmJMJ19 and GmJMJ20 gene paralogs encoding JmjC-domain containing proteins, which co-express and interact with GmLUX2. In vitro and in vivo assays demonstrate that GmJMJ19 and GmJMJ20 bind to histone, but lack histone demethylase activity. Notably, simultaneous mutation of GmJMJ19 and GmJMJ20 causes delayed flowering time. Further transcriptomic, CUT&Tag and ChIP-seq analyses show that GmJMJ19/20 and GmLUX2 primarily co-repress transcription of 168 genes, which are not associated with the alternation of examined histone methylation state. Strikingly, we identify that the direct repression of GmSVP by GmJMJ19/20-GmLUX2 module is independent of the classical EC-E1 pathway. Interestingly, haplotype analyses support the idea that GmJMJ19 might undergo selection during soybean expansion to lower latitude. In summary, our findings reveal a mechanistic insight of GmJMJ19/20-GmLUX2 into flowering time control beyond EC complex in plants and also provide resources for improving soybean adaptability through molecular breeding.
Project description:The Hydrophobic protein from soybean (HPS) locus is polymorphic among soybean cultivars and copy-number changes in the tandem array at this locus are directly correlated with expression level and seed coat luster phenotypes. Keywords: comparative genomic hybridization
Project description:To dissect the gene regulatory networks operating during soybean seed development, we identified the binding sites genome-wide for transcription factor in soybean seeds during seed development using ChIP-seq
Project description:To dissect the gene regulatory networks operating during soybean seed development, we identified the binding sites genome-wide for transcription factor in soybean seeds during seed development using ChIP-seq
Project description:To dissect the gene regulatory networks operating during soybean seed development, we identified the binding sites genome-wide for transcription factor in soybean seeds during seed development using ChIP-seq
Project description:CGH was used to map structural variation (introgressed regions) among soybean iron-inefficient NIL IsoClark with its iron-efficient recurrent parent Clark and donor parent T203. Another NIL series HiPro, LoPro was also used in the study. CGH Comparisions were made among a NIL IsoClark with its parents Clark and T203; also comparisions were made among HiPro and LoPro NIL series. The soybean tiling array consists of 700k probes, spaced at approximately 1.1 kb intervals.
Project description:Soybean aphids are phloem-feeding pests that can cause significant yield losses in soybean plants. Soybean aphids thrive on susceptible soybean lines but not on resistant lines. We used microarrays to characterize the soybean plant's transcriptional defense against aphids in two related cultivars, a susceptible line and a resistant line with the Rag1 aphid-resistance gene. We measured trancript levels in leaves after one and seven days of aphid infestation.
