SSR allelic diversity in relation to morphological traits and resistance to grain mould in sorghum

Sharma, R and Deshpande, S P and Senthilvel, S and Rao, V P and Rajaram, V and Hash, C T and Thakur, R P (2010) SSR allelic diversity in relation to morphological traits and resistance to grain mould in sorghum. Crop and Pasture Science, 61 (3). pp. 230-240.

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Allelic variation at 46 simple sequence repeat (SSR) marker loci well distributed across the sorghum genome was used to assess genetic diversity among 92 sorghum lines, 74 resistant and 18 susceptible to grain mould. Of the 46 SSR markers, 44 were polymorphic, with the number of alleles ranging from 2 to 20 with an average of 7.55 alleles per locus. Genetic diversity among the sorghum lines was high as indicated by polymorphic information content (PIC) and gene diversity values. PIC values of polymorphic SSR markers ranged from 0.16 to 0.90, with an average of 0.54. Gene diversity among the sorghum lines varied from 0.16 to 0.91, with an average score of 0.58 per SSR marker. AMOVA indicated that 12% of the total variation observed among the sorghum lines was accounted for between grain mould resistant and susceptible types. Diversity based on six morphological traits and grain mould scores indicated major roles of panicle type and glumes coverage, followed by grain colour, in clustering of the lines. Seven grain mould resistant/ susceptible pairs with dissimilarity indices >0.50, but with similar flowering time, plant height, and panicle type/ inflorescence within each pair, were selected for use in developing recombinant inbred line mapping populations to identify genomic regions (and quantitative trait loci) associated with sorghum grain mould resistance.

Item Type: Article
Uncontrolled Keywords: diversity; grain mould; sorghum; SSR
Agro Tags: <b>Agrotags</b> - sorghum | grain | genetics | fungi | alleles | genes | sorghum bicolor | locus | social groups | crops <br><b>Fishtags</b> - NOT-AVAILABLE<br><b>Geopoliticaltags</b> - india | principe | maine | andhra pradesh | jordan | texas
Subjects: Mandate crops > Sorghum
Depositing User: Users 6 not found.
Date Deposited: 07 Jul 2011 05:29
Last Modified: 07 Jul 2011 05:29
Official URL:
Acknowledgement: UNSPECIFIED
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