HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by May, O. L. Articles by Calhoun, D. S. Search for Related Content PubMed Articles by May, O. L. Articles by Calhoun, D. S. Agricola Articles by May, O. L. Articles by Calhoun, D. S.

Genetic Diversity of U.S. Upland Cotton Cultivars Released between 1980 and 1990

USDA-ARS and Dep. of Agronomy, 500 Pocket Road, Florence, SC 29501-9603
Dep. of Crop Science, North Carolina State Univ., Raleigh, NC, 27695-8604
Mississippi State Univ., P.O. Box 197, Stoneville, MS, 38776

^* Corresponding author.

Sustained genetic advance requires that genetically diverse parents be mated to form segregating populations for selection. Genetic diversity of U.S. cotton (Gossypium hirsutum L.) cultivars has not been extensively quantified. We assessed diversity among 126 Upland cotton cultivars released between 1980 and 1990 by use of coefficient of parentage (CP). In computing CP, we utilized assumptions appropriate for self-pollinated crops. Mean CP among the 126 cultivars was 0.07, implying a genetically diverse group. However, cluster analysis revealed 12 distinct gene pools, with mean within-cluster CP = 0.25 and between-cluster CP = 0.04. Overall, clusters corresponded to area of cultivar origin. The CP analysis indicates that Acala-type cultivars are more diverse than those bred in the Mississippi Delta or southeastern USA. A trend in germplasm usage in the late 1980s was the repeated mating of genetically related material, or reselection within germplasm, to develop proprietary cultivars. To ensure continued progress in cotton improvement, we suggest that cotton breeders consider the pedigree of parents prior to population synthesis.

Received for publication March 16, 1995.

This article has been cited by other articles:

				A. R. Gingle, H. Yang, P. W. Chee, O. L. May, J. Rong, D. T. Bowman, E. L. Lubbers, J. L. Day, and A. H. Paterson An Integrated Web Resource for Cotton Crop Sci., September 8, 2006; 46(5): 1998 - 2007. [Abstract] [Full Text] [PDF]

				R. G. Percy, R. G. Cantrell, and J. Zhang Genetic Variation for Agronomic and Fiber Properties in an Introgressed Recombinant Inbred Population of Cotton Crop Sci., April 25, 2006; 46(3): 1311 - 1317. [Abstract] [Full Text] [PDF]

				J. F. Zhang, Y. Lu, H. Adragna, and E. Hughs Genetic Improvement of New Mexico Acala Cotton Germplasm and Their Genetic Diversity Crop Sci., September 23, 2005; 45(6): 2363 - 2373. [Abstract] [Full Text] [PDF]

				J. Zhang, Y. Lu, R. G. Cantrell, and E. Hughs Molecular Marker Diversity and Field Performance in Commercial Cotton Cultivars Evaluated in the Southwestern USA Crop Sci., June 24, 2005; 45(4): 1483 - 1490. [Abstract] [Full Text] [PDF]

				A. H. Paterson, R. K. Boman, S. M. Brown, P. W. Chee, J. R. Gannaway, A. R. Gingle, O. L. May, and C. W. Smith Reducing the Genetic Vulnerability of Cotton Crop Sci., November 1, 2004; 44(6): 1900 - 1901. [Full Text] [PDF]

				D. T. Bowman, O. L. May, and J. B. Creech Genetic Uniformity of the U.S. Upland Cotton Crop since the Introduction of Transgenic Cottons Crop Sci., March 1, 2003; 43(2): 515 - 518. [Abstract] [Full Text] [PDF]