Mondal Suvendu, Badigannavar Anand M
1Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, 400085 India.
2Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094 India.
3 Biotech. 2019 Sep;9(9):347. doi: 10.1007/s13205-019-1881-7. Epub 2019 Aug 30.
Hundred kernel weight is an important indicator for large-seeded genotype selection. A recombinant inbred line population was used to decipher the genetic architecture of seed size and three pod traits in cultivated groundnut based on the phenotypic data from six and three environments, respectively. The study revealed a consensus major QTL for HKW in B07 group that explained 10.5-23.9% phenotypic variation due to seed size. Further, two other minor QTLs were identified in B03 and B08 group for the seed size. Two minor QTLs for pod beak were positioned in B03 and A08. A minor QTL for pod reticulation was also mapped in the same map interval with the pod beak QTL in A08. Another minor QTL for pod constriction was co-mapped with the minor QTL for HKW in B08. The other minor QTL for pod constriction was placed in the neighboring map interval with the consensus QTL for seed size in B07 that suggests linkage of pod constriction with large seed trait. Analysis of the flanking markers profile in 71 cultivated groundnut genotypes revealed a strong association of pPGPseq_2E06 marker with large seed trait.
百粒重是大粒基因型选择的重要指标。利用重组自交系群体，分别基于六个和三个环境的表型数据，解析栽培花生种子大小和三个荚果性状的遗传结构。该研究在B07组中发现了一个关于百粒重的共显性主效QTL，由于种子大小，该QTL解释了10.5 - 23.9%的表型变异。此外，在B03和B08组中还鉴定出另外两个与种子大小相关的微效QTL。在B03和A08中定位到两个与荚果喙相关的微效QTL。在A08中，一个与荚果网纹相关的微效QTL也定位在与荚果喙QTL相同的图谱区间。在B08中，另一个与荚果缢缩相关的微效QTL与百粒重的微效QTL共定位。另一个与荚果缢缩相关的微效QTL位于B07中与种子大小共显性QTL相邻的图谱区间，这表明荚果缢缩与大粒性状存在连锁关系。对71个栽培花生基因型的侧翼标记谱分析表明，pPGPseq_2E06标记与大粒性状存在强关联。
