Characterization of heterosis and genomic prediction‐based establishment of heterotic patterns for developing better hybrids in pigeonpea. Issue 3 (1st August 2021)

• Record Type: Journal Article
• Authors: Saxena, Rachit K.; Jiang, Yong; Khan, Aamir W; Zhao, Yusheng; Kumar Singh, Vikas; Bohra, Abhishek; Sonappa, Muniswamy; Rathore, Abhishek; Kumar, C.V. Sameer; Saxena, Kulbhushan; Reif, Jochen; Varshney, Rajeev K.
• Is Part Of: œplant genome. Volume 14:Issue 3(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-01
• Subjects: Plant genomes -- Periodicals; Plant genome mapping -- Periodicals; 572.862
• DOI: 10.1002/tpg2.20125
• Languages: English
• ISSNs: 1940-3372

Abstract

Abstract: Whole‐genome resequencing (WGRS) of 396 lines, consisting of 104 hybrid parental lines and 292 germplasm lines, were used to study the molecular basis of mid‐parent heterosis (MPH) and to identify complementary heterotic patterns in pigeonpea [ Cajanus cajan (L.) Millsp.] hybrids. The lines and hybrids were assessed for yield and yield‐related traits in multiple environments. Our analysis showed positive MPH values in 78.6% of hybrids, confirming the potential of hybrid breeding in pigeonpea. By using genome‐wide prediction and association mapping approaches, we identified 129 single nucleotide polymorphisms and 52 copy number variations with significant heterotic effects and also established a high‐yielding heterotic pattern in pigeonpea. In summary, our study highlights the role of WGRS data in the study and use of heterosis in crops where hybrid breeding is expected to boost selection gain in order to ensure global food security. Core Ideas: We characterized the molecular basis of mid‐parent heterosis. We established the molecular foundation of genome‐wide prediction for breeding hybrids. We identified the loci contributing to mid‐parent heterosis. We predicted the best possible combinations for generating high‐yielding cultivars.