Recent Advances in Marker-Assisted Selection for Drought Tolerance in Pearl Millet

By R. Serraj, C. T. Hash, S. M. H. Rizvi, Amit Kumar Sharma, R. Yadav, F. Bidinger. 2005

141 citations recorded by the source corpus.

Abstract Pearl millet [Pennisetum glaucum (L.) R. Br.] is the staple cereal of the hottest, driest areas of the tropics and subtropics. Drought stress is a regular occurrence in these regions, making stress tolerance an essential attribute of new pearl millet cultivars. Recent breeding research has mapped several quantitative trait loci (QTLs) for components of grain and stover yield per se, as well as yield maintenance, under terminal drought stress conditions. We report here the evaluation of these QTLs as possible selection criteria for improving stress tolerance of an elite hybrid cultivar. Initial evaluations, based on hybrids made with topcross pollinators bred from lines selected directly from the mapping population, indicated an advantage to the QTL-based topcross hybrids. This advantage seemed to be related to a particular plant phenotype that was similar to that of the drought tolerant parent of the mapping population. Subsequent evaluations were based on testcross hybrids of drought tolerance QTL introgression lines in the background of the drought-sensitive parent of the mapping population, H 77/833-2. These introgression lines were bred by limited marker-assisted backcrossing of a putative major drought tolerance QTL into H 77/833-2 from the mapping population’s drought tolerant parent. Several of these QTL introgression lines had a significant positive general combining ability for grain yield under terminal stress and significantly out-yielded testcross hybrids made with the original recurrent parent both in unrelieved terminal drought stress and in gradient stress evaluations.

Subfields: Genetics, Plant Science

View Paper: https://www.semanticscholar.org/paper/b112621993007046592df00ffe1bedfb64cb51e2

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Citations in the corpus

Drought Resistance Improvement in Rice: An Integrated Genetic and Resource Management Strategy (2011, background): “In contrast, MAS offers the potential to assemble target traits in the same genotype more precisely, with fewer unintentional losses in fewer selection cycles (Xu and Crouch, 2008).”
Quantitative trait loci for grain yield in pearl millet under variable postflowering moisture conditions (2007, background): “Several QTLs have been identifi ed and the process of evaluating their eff ectiveness is underway (Bidinger et al., 2005; Serraj et al., 2005 ).”
Biotechnology and Drought Tolerance (2009, background): “BC4F3 progenies from selected BC4F2 plants homozygous for various portions of the LG 2 target region were crossed to each of five related, early-maturing seed parents, and the resulting hybrids were evaluated under a range of terminal stress environments (Serraj et al., 2005).”
Drought tolerance improvement in crop plants: An integrated view from breeding to genomics (2008, background): “Similarly, when a pearl millet major QTL for grain yield under terminal drought stress was transferred into a drought sensitive genotype the genotypes carrying the introgression at the target QTL showed a consistent grain yield advantage (Serraj et al., 2005).”
Improvement of drought resistance in rice. (2009, background): “The lack of repeatability of QTL effects across different populations (QTL genetic background interaction) and across environments (QTL environment interaction) are two factors that limit the use of QTLs for MAS by plant breeders (Bernier et al., 2008; Courtois et al., 2003; Lafitte et al., 2004; Pr”
Improving water use in crop production (2008, background): “As a consequence, MAS is well established in many breeding programmes, including those selecting for improved drought resistance (e.g. Schneider et al. 1997; Subudhi et al. 2000; Foolad et al. 2003; Serraj et al. 2005; Jongdee et al. 2006; Steele et al. 2006).”
Genetic Improvement of Pearl Millet in India (2013, background): “One drought tolerance QTL on LG2 [157] has been transferred to drought-sensitive pearl millet lines through marker-assisted backcross breeding [91].”
Small temporal differences in water uptake among varieties of pearl millet (Pennisetum glaucum (L.) R. Br.) are critical for grain yield under terminal drought (2013, background): “This confirmed the results obtained with these genotypes in earlier field trials (Serraj et al. 2005) and therefore validated the use of the lysimetric platform for obtaining relevant agronomic assessments under controlled conditions.”
Inducing drought tolerance in plants: recent advances. (2010, background): “Subsequent evaluations as reported by Serraj et al. (2005) were based on testcross hybrids of drought tolerance QTL introgression lines in the gene pool of the drought-sensitive parent of the mapping population, H 77/833-2.”