Indian Institute of Pulses Research (IIPR), Kanpur 208 024, India.
J Genet. 2021;100.
High temperature (HT) stress is assuming serious production constraint for chickpea production worldwide. A collection of 182 diverse chickpea genotypes was assessed for genetic variation in 15 traits including phenological, physiological and yield-related traits under both normal sown (NS) and late sown (LS) conditions for two years 2017-2018 and 2018-2019, which revealed significant variation for all the traits. Association mapping of chickpea genotypes was also conducted with 120 simple sequence repeat markers distributed across all the chickpea chromosomes to discern the molecular diversity and to capture the significant marker-trait association (MTA). MTA analysis based on mixed linear model (MLM) revealed a total of 24 and 14 significant associations for various traits evaluated under NS conditions in 2017 and 2018, respectively. Similarly, a total of 17 and 34 significant associations for various traits were also recorded under LS conditions in 2018 and 2019, respectively. Notably, ICCM0297, NCPGR150, TAA160 and NCPGR156 markers showed significant MTA under both NS and LS conditions and GA11 exhibited significant MTA for filled pod% under late sown condition for both years. Thus, these markers could be useful for genomics-assisted breeding for developing heat-tolerant chickpea genotype.
高温（HT）胁迫正在成为全球鹰嘴豆生产的严重生产限制。在 2017-2018 年和 2018-2019 年的两年中，对 182 个不同的鹰嘴豆基因型进行了评估，评估了包括在正常播种（NS）和晚播（LS）条件下的 15 个性状的遗传变异，包括物候学、生理学和产量相关性状，结果表明所有性状均存在显著差异。还对 120 个简单序列重复标记进行了鹰嘴豆基因型的关联作图，这些标记分布在所有鹰嘴豆染色体上，以辨别分子多样性，并捕获显著的标记-性状关联（MTA）。基于混合线性模型（MLM）的 MTA 分析显示，在 2017 年和 2018 年的 NS 条件下，对各种性状的评估分别有 24 个和 14 个显著关联。同样，在 2018 年和 2019 年的 LS 条件下，对各种性状的评估分别记录了 17 个和 34 个显著关联。值得注意的是，ICCM0297、NCPGR150、TAA160 和 NCPGR156 标记在 NS 和 LS 条件下均表现出显著的 MTA，而 GA11 在两年的晚播条件下对饱满豆荚%表现出显著的 MTA。因此，这些标记可用于耐热鹰嘴豆基因型的基因组辅助育种。
