Open AccessCharacterization of heterosis and genomic prediction‐based establishment of heterotic patterns for developing better hybrids in pigeonpea
Author(s) -
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.
Publication year - 2021
Publication title -
the plant genome
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.403
H-Index - 41
ISSN - 1940-3372
DOI - 10.1002/tpg2.20125
Subject(s) - heterosis , hybrid , germplasm , biology , cajanus , heterotic string theory , genome , microbiology and biotechnology , genetics , gene , agronomy , physics , theoretical physics
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.