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Genotyping-by-sequencing and multilocation evaluation of two interspecific backcross populations identify QTLs for yield-related traits in pigeonpea

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Relation http://oar.icrisat.org/11613/
https://doi.org/10.1007/s00122-019-03504-z
doi:10.1007/s00122-019-03504-z
 
Title Genotyping-by-sequencing and multilocation evaluation of two interspecific backcross populations identify QTLs for yield-related traits in pigeonpea
 
Creator Saxena, R K
Kale, S
Mir, R R
Mallikarjuna, N
Yadav, P
Das, R R
Molla, J
Sonnappa, M
Ghanta, A
Narasimhan, Y
Rathore, A
Kumar, C V S
Varshney, R K
 
Subject Pigeonpea
Genetics and Genomics
 
Description This study has identified single-nucleotide polymorphism (SNP) markers associated with nine yield-related traits in pigeonpea
by using two backcross populations (BP) developed through interspecific crosses and evaluating them at two locations
and 3 years. In both the populations, markers have shown strong segregation distortion; therefore, a quantitative trait locus
(QTL) mapping mixed model was used. A total of 86 QTLs explaining 12–21% phenotypic variation were detected in BP-1.
On the other hand, 107 QTLs explaining 11–29% phenotypic variation were detected in BP-2. Although most QTLs were
environment and trait specific, few stable and consistent QTLs were also detected. Interestingly, 11 QTLs in BP-2 were
associated with more than one trait. Among these QTLs, eight QTLs associated with days to 50% flowering and days to
75% maturity were located on CcLG07. One SNP “S7_14185076” marker in BP-2 population has been found associated
with four traits, namely days to 50% flowering, days to 75% maturity, primary branches per plant and secondary branches
per plant with positive additive effect. Hence, the present study has not only identified QTLs for yield-related traits, but also
discovered novel alleles from wild species, which can be used for improvement of traits through genomics-assisted breeding.
 
Publisher SPRINGER
 
Date 2019-12
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11613/1/s00122-019-03504-z-1.pdf
Saxena, R K and Kale, S and Mir, R R and Mallikarjuna, N and Yadav, P and Das, R R and Molla, J and Sonnappa, M and Ghanta, A and Narasimhan, Y and Rathore, A and Kumar, C V S and Varshney, R K (2019) Genotyping-by-sequencing and multilocation evaluation of two interspecific backcross populations identify QTLs for yield-related traits in pigeonpea. Theoretical and Applied Genetics (TSI), 133 (3). pp. 737-749. ISSN 0040-5752