International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India.
School of Agriculture and Environment and Institute of Agriculture, University of Western Australia, Crawley, Western Australia, Australia.
Nat Genet. 2017 Jul;49(7):1082-1088. doi: 10.1038/ng.3872. Epub 2017 May 22.
Pigeonpea (Cajanus cajan), a tropical grain legume with low input requirements, is expected to continue to have an important role in supplying food and nutritional security in developing countries in Asia, Africa and the tropical Americas. From whole-genome resequencing of 292 Cajanus accessions encompassing breeding lines, landraces and wild species, we characterize genome-wide variation. On the basis of a scan for selective sweeps, we find several genomic regions that were likely targets of domestication and breeding. Using genome-wide association analysis, we identify associations between several candidate genes and agronomically important traits. Candidate genes for these traits in pigeonpea have sequence similarity to genes functionally characterized in other plants for flowering time control, seed development and pod dehiscence. Our findings will allow acceleration of genetic gains for key traits to improve yield and sustainability in pigeonpea.
斑鸠（Cajanus cajan）是一种热带豆科植物，需投入的资源较少，预计将继续在亚洲、非洲和美洲热带地区的发展中国家在提供粮食和营养安全方面发挥重要作用。我们对包括育成品种、地方品种和野生种在内的 292 份斑鸠属资源进行了全基因组重测序，对全基因组变异进行了分析。基于对选择清除的扫描，我们发现了几个可能是驯化和选育的目标的基因组区域。利用全基因组关联分析，我们鉴定了几个候选基因与农艺性状之间的关联。这些斑鸠属候选基因与在其他植物中功能明确的控制开花时间、种子发育和荚果开裂的基因具有序列相似性。我们的研究结果将有助于加速关键性状的遗传进展，以提高斑鸠属的产量和可持续性。
