1999
DOI: 10.1007/s004380051120
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Mapping of post-flowering drought resistance traits in grain sorghum: association between QTLs influencing premature senescence and maturity

Abstract: The identification of genetic factors underlying the complex responses of plants to drought stress provides a solid basis for improving drought resistance. The staygreen character in sorghum (Sorghum bicolor L. Moench) is a post-flowering drought resistance trait, which makes plants resistant to premature senescence under drought stress during the grainfilling stage. The objective of this study was to identify quantitative trait loci (QTLs) that control premature senescence and maturity traits, and to investig… Show more

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Cited by 202 publications
(147 citation statements)
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“…Collocation of QTL for staygreen and those for leaf wax and temperature depression Most Stg QTL are located on SBI-02 and SBI-05 (Xu et al 2000;Haussmann et al 2002;Subudhi et al 2000;Crasta et al 1999). In this study, only the staygreen QTL Stg 1, Stg2, Stg3 and Stg4 were considered as Stg loci (Xu et al 2000;Crasta et al 1999).…”
Section: Discussionmentioning
confidence: 99%
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“…Collocation of QTL for staygreen and those for leaf wax and temperature depression Most Stg QTL are located on SBI-02 and SBI-05 (Xu et al 2000;Haussmann et al 2002;Subudhi et al 2000;Crasta et al 1999). In this study, only the staygreen QTL Stg 1, Stg2, Stg3 and Stg4 were considered as Stg loci (Xu et al 2000;Crasta et al 1999).…”
Section: Discussionmentioning
confidence: 99%
“…QTL peak position, 1-LOD widths, and the proportion of phenotypic variance explained were extracted from the plots. All QTL were overlaid on the Stg QTL positions previously published (Crasta et al 1999;Subudhi et al 2000;Xu et al 2000) for the same mapping population. These previously mapped Stg loci were derived from a visual phenotypic rating on a to 5 scale.…”
Section: Qtl Mapping and Analysismentioning
confidence: 99%
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“…It has a low grain yield under the conditions of this experiment, due to its short plant height, small panicle size, and low grain number. A number of stay-green QTLs have been identiWed by diVerent research groups based on RIL populations derived from crosses involving this line or its derivatives (Tuinstra et al 1996;Crasta et al 1999;Xu et al 2000b;Subudhi et al 2000;Sanchez et al 2002). The recurrent parent, R 16, is a released, high yielding but very senescent, post-rainy (rabi) season variety.…”
Section: Methodsmentioning
confidence: 99%
“…The trait is likely to be more easily manipulated using a marker-assisted breeding approach, using as selection criteria speciWc alleles at molecular loci linked to genomic regions contributing to the stay-green trait (i.e., quantitative trait loci = QTLs), identiWed in carefully managed, replicated, multi-environment tests. The work of diVerent groups has led to a better understanding of the inheritance of stay-green (Walulu et al 1994;van Oosterom et al 1996;Tuinstra et al 1997), to the mapping of QTLs associated with postXowering drought tolerance in sorghum (Tuinstra et al 1996(Tuinstra et al , 1998Crasta et al 1999;Tao et al 2000;Xu et al 2000b;Subudhi et al 2000;Kebede et al 2001;Sanchez et al 2002;Haussmann et al 2002) and identiWcation of markers linked to these QTLs (Hash et al 2003;Harris et al 2007).…”
Section: Introductionmentioning
confidence: 99%