Mapping QTL for drought stress-induced premature senescence and maturity in cowpea [Vigna unguiculata (L.) Walp.].

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Wellington MucheroP A Roberts

Abstract

Cowpea is an important crop for subsistence farmers in arid regions of Africa, Asia, and South America. Efforts to develop cultivars with improved productivity under drought conditions are constrained by lack of molecular markers associated with drought tolerance. Here, we report the mapping of 12 quantitative trait loci (QTL) associated with seedling drought tolerance and maturity in a cowpea recombinant inbred (RIL) population. One hundred and twenty-seven F(8) RILs developed from a cross between IT93K503-1 and CB46 were screened with 62 EcoR1 and Mse1 primer combinations to generate 306 amplified fragment length polymorphisms for use in genetic linkage mapping. The same population was phenotyped for maintenance of stem greenness (stg) and recovery dry weight (rdw) after drought stress in six greenhouse experiments. In field experiments conducted over 3 years, visual ratings and dry weights were used to phenotype drought stress-induced premature senescence in the RIL population. Kruskall-Wallis and multiple-QTL model mapping analysis were used to identify QTL associated with drought response phenotypes. Observed QTL were highly reproducible between stg and rdw under greenhouse conditions. Field studies confirmed all ten droug...Continue Reading

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Citations

Oct 17, 2009·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Wellington MucheroPhilip A Roberts
Oct 15, 2009·Proceedings of the National Academy of Sciences of the United States of America·Wellington MucheroTimothy J Close
Sep 20, 2011·BMC Plant Biology·Blanca E Barrera-FigueroaRenyi Liu
Apr 9, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Abhishek BohraRajeev K Varshney
Dec 14, 2011·Molecular Breeding : New Strategies in Plant Improvement·Veerle Van DammeM Carmen de Vicente
Jul 5, 2016·Frontiers in Plant Science·Ousmane BoukarTimothy J Close
Feb 10, 2017·Journal of the Science of Food and Agriculture·Márcia CarvalhoValdemar Carnide
Jan 23, 2018·The Plant Journal : for Cell and Molecular Biology·Bao-Lam HuynhPhilip A Roberts
Sep 14, 2018·Frontiers in Plant Science·Sangam L DwivediRodomiro Ortiz
May 28, 2019·International Journal of Molecular Sciences·Muhammad NadeemLijuan Qiu
Sep 16, 2020·Cancers·Athanasios BlanasSandra J van Vliet
Jun 21, 2019·International Journal of Molecular Sciences·Jitendra KumarShiv Kumar
Aug 24, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Changyou LiuShumin Wang
Jul 4, 2020·Current Opinion in Plant Biology·Rajneesh PaliwalOyatomi Olaniyi

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