Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: 9/1/2005
Publication Date: 1/15/2006
Citation: Abdurakhmonov, I.Y., Kohel, R.J., Saha, S., Pepper, A.E., Yu, J., Buriev, T.Z., Shermatov, S., Abdullaev, A., Jenkins, J.N., Abdukarimov, A. 2006. Molecular genetic diversity of G. hirsutum cotton accession from Uzbek cotton germplasm revealed by a core set and chromosome specific microsatellite markers [abstract]. Proceedings of Plant and Animal Genome XIV Conference. Paper No. P131.
Technical Abstract: The application of marker-assisted breeding for the incorporation of superior-fiber-quality genes in elite cultivars would assist in the development of new cultivars adapted for different growing conditions. However, the narrow genetic base of currently available cotton cultivars makes it difficult to map important traits using molecular markers, justifying the exploration of novel germplasm resources and identification of candidate genetic resources for important agronomic traits. We have selected 1000 G. hirsutum wild and variety accessions from Uzbek Cotton Germplasm Collection. These selected variety and exotic cotton accessions were grown in Uzbekistan and Mexico and evaluated for at least 14 morphological traits as well as for fiber quality. Furthermore, 286 exotic G. hirsutum accession were analyze with a core set of 100 SSR markers and 384 variety accession were analyzed with 80 chromosome specific SSR markers, covering nine chromosomes of cotton. The phylogenetic analysis of SSR marker genotypes and analyses of trait characteristics revealed wide range of diversity within studied accession. The correlation of microsatellite marker data with fiber quality data is in progress, which will help to identify 1) candidate cotton accessions with new potential fiber quality and other agronomic genes, 2) the level of a linkage disequilibrium in cotton genome, 3) a set of useful SSR markers lined with important agronomic traits for MAS programs. We developed an electronic database for the examined cotton accessions in pc-GRIN format and accession were exchanged with USDA-ARS, USA. This work should be useful in the development of superior quality cotton cultivars competitive in world market in the future.