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

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Relation http://oar.icrisat.org/89/
http://dx.doi.org/10.1071/CP09192
 
Title SSR allelic diversity in relation to morphological traits
and resistance to grain mould in sorghum
 
Creator Sharma, R
Deshpande, S P
Senthilvel, S
Rao, V P
Rajaram, V
Hash, C T
Thakur, R P
 
Subject Sorghum
 
Description 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.
 
Publisher CSIRO
 
Date 2010
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/89/1/CropPastSci61_3_230-240__2010.pdf
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.