Assessment of Sorghum Genetic Resources for Genetic Diversity and Drought Tolerance Using Molecular Markers and Agro-morphological Traits

Assar, A.H.A. and Uptmoor, R. and Abdelmula, A.A. and et al, . (2009) Assessment of Sorghum Genetic Resources for Genetic Diversity and Drought Tolerance Using Molecular Markers and Agro-morphological Traits. University of Khartoum Journal of Agricultural Sciences, 17 (1). pp. 1-22.

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Abstract

Forty sorghum genotypes were investigated for genetic diversity and drought tolerance. Diversity parameters were estimated using 16 Simple Sequence Repeats markers. For assessment of drought tolerance, the genotypes were field evaluated under normal and drought stress conditions for two seasons in three environments, in Sudan. In total, 98 SSRs alleles were detected with an average of 6.1 alleles per locus. The estimated polymorphic information contents ranged from 0.33 to 0.86. The genetic similarity ranged from 0.00 to 0.88 with a low mean of 0.32. The dendrogram, generated from the UPGMA cluster analysis, showed two main clusters differentiated into nine sub-clusters with close relationship to morphological characters and pedigree information. Mantel statistics revealed a good fit of the cophenetic values to the original data set (r = 0.88). The overall mean genetic diversity was 0.67. Significant differences were detected among genotypes under both normal and drought stressed conditions for all measured traits. Based on the relative yield, the most drought-tolerant genotypes were Arfa Gadamak, Wad Ahmed, El-Najada, Korcola, ICSR 92003 and Sham Sham. Drought caused five days delay in flowering, and the earliest genotypes were PI 569695, PI 570446, PI 569953, Dwarf White Milo and PI 569951.

Item Type: Article
Uncontrolled Keywords: Genetic diversity, Drought tolerance, Molecular markers, Morphological traits, Sorghum
Author Affiliation: Institute of Crop Science and Plant Breeding I, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr B Krishnamurthy
Date Deposited: 21 Jul 2017 04:36
Last Modified: 21 Jul 2017 04:36
URI: http://eprints.icrisat.ac.in/id/eprint/14878

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