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ARS Home » Southeast Area » Mississippi State, Mississippi » Crop Science Research Laboratory » Genetics and Sustainable Agriculture Research » Research » Publications at this Location » Publication #159463


item Saha, Sukumar

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 1/5/2004
Publication Date: 5/1/2004
Citation: Stelly, D., Saha, S. 2004. Organizing cotton genomics through physical mapping [abstract]. Proceedings National Cotton Council Beltwide Cotton Conference. p.172.

Interpretive Summary:

Technical Abstract: Cotton genomics still faces a number of fundamental challenges, solutions to which demand a multi-faceted physical mapping approach. In available public linkage maps of tetraploid cotton, the numbers of linkage groups are greater than the gametic chromosome number (26), and many linkage groups are "unidentified, i.e., yet to be associated with specific chromosomes. Moreover, common identities among many linkage groups from different laboratories have not been established, and a common nomenclature is yet to be established. Among the factors that have impeded cotton genome map development are [1] the total amount of recombination is very high, [2] the crossover distribution is highly nonrandom, [3] an over-reliance on genome-wide marker development strategies, [4] incompleteness of genome coverage available through hypo-aneuploids, and [5] under-utilization of physical mapping by available molecular cytogenetic methods. We will discuss how cytogenetic stocks, molecular cytogenetics and other physical mapping approaches can be used in an integrated manner to address a number of the problems that have to date precluded the establishment of a genome-wide framework for cotton genomics. There exists an opportunity to use physical mapping resources as a means to foster international collaboration on cotton genomics. Such improvements will promote research that will contribute to developments that enhance cotton fiber as a competitor for textile use. We gratefully acknowledge continued support from Texas Agricultural Experiment Station, USDA-ARS, occasionally USDA-NRICGP, Texas Food & Fiber Commission (TFFC), cotton growers in Texas (Texas State Support Committee), and national germplasm effort through Cotton, Inc.