Genotypic variation in sorghum [Sorghum bicolor (L.) Moench] exotic germplasm collections for drought and disease tolerance

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dc.contributor.author Kapanigowda, Mohankumar H.
dc.contributor.author Perumal, Ramasamy
dc.contributor.author Djanaguiraman, Maduraimuthu
dc.contributor.author Aiken, Robert M.
dc.contributor.author Tesso, Tesfaye T.
dc.contributor.author Prasad, P. V. Vara
dc.contributor.author Little, Christopher R.
dc.date.accessioned 2014-10-01T19:32:05Z
dc.date.available 2014-10-01T19:32:05Z
dc.date.issued 2014-10-01
dc.identifier.uri http://hdl.handle.net/2097/18359
dc.description.abstract Sorghum [Sorghum bicolor (L.) Moench] grain yield is severely affected by abiotic and biotic stresses during post-flowering stages, which has been aggravated by climate change. New parental lines having genes for various biotic and abiotic stress tolerances have the potential to mitigate this negative effect. Field studies were conducted under irrigated and dryland conditions with 128 exotic germplasm and 12 adapted lines to evaluate and identify potential sources for post-flowering drought tolerance and stalk and charcoal rot tolerances. The various physiological and disease related traits were recorded under irrigated and dryland conditions. Under dryland conditions, chlorophyll content (SPAD), grain yield and HI were decreased by 9, 44 and 16%, respectively, compared to irrigated conditions. Genotype RTx7000 and PI475432 had higher leaf temperature and grain yield, however, genotype PI570895 had lower leaf temperature and higher grain yield under dryland conditions. Increased grain yield and optimum leaf temperature was observed in PI510898, IS1212 and PI533946 compared to BTx642 (B35). However, IS14290, IS12945 and IS1219 had decreased grain yield and optimum leaf temperature under dryland conditions. Under irrigated conditions, stalk and charcoal rot disease severity was higher than under dryland conditions. Genotypes IS30562 and 1790E R had tolerance to both stalk rot and charcoal rot respectively and IS12706 was the most susceptible to both diseases. PI510898 showed combined tolerance to drought and Fusarium stalk rot under dryland conditions. The genotypes identified in this study are potential sources of drought and disease tolerance and will be used to develop better adaptable parental lines followed by high yielding hybrids. en_US
dc.language.iso en_US en_US
dc.relation.uri http://www.springerplus.com/content/2/1/650 en_US
dc.rights This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. en_US
dc.subject Sorghum bicolor en_US
dc.subject Climate change en_US
dc.subject Drought en_US
dc.subject Chlorophyll fluorescence en_US
dc.subject Charcoal rot en_US
dc.subject Fusarium stalk rot en_US
dc.subject Principle component analysis en_US
dc.title Genotypic variation in sorghum [Sorghum bicolor (L.) Moench] exotic germplasm collections for drought and disease tolerance en_US
dc.type Article (publisher version) en_US
dc.date.published 2013 en_US
dc.citation.doi doi:10.1186/2193-1801-2-650 en_US
dc.citation.jtitle SpringerPlus en_US
dc.citation.spage 650 en_US
dc.citation.volume 2 en_US
dc.contributor.authoreid perumal en_US
dc.contributor.authoreid raiken en_US
dc.contributor.authoreid ttesso en_US
dc.contributor.authoreid vara en_US
dc.contributor.authoreid crlittle en_US


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