Towards the introgression of PvPdh1 for increased resistance to pod shattering in common bean

Some varieties of common bean (Phaseolus vulgaris L.) suffer from pod shattering, which can severely reduce yields, especially in arid conditions. The PvPdh1 locus on chromosome Pv03 has recently been described as a major locus controlling pod shattering in common bean and could be used to mitigate pod shattering in the future. Despite this, the role of a possible second locus on chromosome Pv08 remains unclear and patterns of dominance and epistasis between alleles of these genes have not been resolved. This information will be vital for efficient selection to decrease pod shattering. Further, the genetic diversity around the PvPdh1 gene has not yet been thoroughly explored and there are not yet genetic screens that can be used to evaluate pod shattering in segregating populations. Here, we have developed a recombinant inbred population to determine the roles of genes implicated in pod shattering and evaluate the patterns of dominance among the relevant alleles. Our results suggest tha...

普通菜豆（Phaseolus vulgaris L.）的部分品种易发生荚果开裂现象，该现象会导致严重减产，在干旱环境中尤为突出。近期研究将Pv03号染色体上的PvPdh1基因座（locus）认定为调控普通菜豆荚果开裂的主效基因座，未来可借助该位点缓解菜豆荚裂问题。尽管如此，Pv08号染色体上潜在的第二基因座的功能仍未明确，且上述基因的等位基因（alleles）间的显性模式与上位性（epistasis）互作模式尚未阐明。此类信息对于通过高效育种选择降低菜豆荚裂发生率至关重要。此外，目前尚未对PvPdh1基因周边的遗传多样性开展全面探究，也尚未建立可用于评估分离群体（segregating population）中菜豆荚果开裂程度的遗传筛选体系。本研究构建了重组自交系群体（recombinant inbred population），以明确与菜豆荚果开裂相关的基因功能，并解析相关等位基因间的显性模式。本研究结果表明……