| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Dep. of Crop Science, Raleigh, NC 27695-8604
USDA-ARS and Clemson University, Florence, SC 29502-3039
MAFES, Delta Branch Exp. Stn., Stoneville, MS 38776
* Corresponding author (bowman{at}unity.nesu.edu).
Most cotton (Gossypium spp.) breeders today, without recourse to critical data, assume that the genetic base in modern New World cotton cultivars is narrow. The objectives of this study were to: (i) determine the average coefficient of parentage for 260 upland cotton (G. hirsutum L.) cultivars released between 1970 and 1990; and (ii) determine the contributions of a number of public and private breeding programs and of various ancestral lines to the genetic diversity of those cultivars. Coefficients of parentage among 260 cultivars showed an average value of 0.07. This estimate suggests substantial remaining diversity. This conclusion must take into account possible bias from widespread reselection of cotton cultivars and the accompanying assumption of a genetic correlation of 0.75 between generations. The most influential breeding programs, in terms of genetic contributions to cultivar development, were Stoneville Pedigreed Seed Company, Coker's Pedigreed Seed Company, and New Mexico Agricultural Experiment Station. Historically, the most influential cultivar is Stoneville 2. The genetic contribution of 54 ancestral lines, including nine introductions, accounted for less than 25% of the total genetic variation among the 260 cultivars. This low value is thought to result from the loss of genetic information through the process of reselection. The genetic base in modern cotton cultivars is not particularly narrow and continue to offer opportunities for cultivar improvement.
Received for publication May 17, 1995.
This article has been cited by other articles:
|
|
 |
|
  J. C. McCarty, J. Wu, and J. N. Jenkins Use of Primitive Derived Cotton Accessions for Agronomic and Fiber Traits Improvement: Variance Components and Genetic Effects Crop Sci., January 22, 2007; 47(1): 100 - 110. [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]
|
|
|
|
|
|
G. Van Becelaere, E. L. Lubbers, A. H. Paterson, and P. W. Chee Pedigree- vs. DNA Marker-Based Genetic Similarity Estimates in Cotton Crop Sci., September 23, 2005; 45(6): 2281 - 2287. [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]
|
|
|
|
|
|
O. A. Gutierrez, S. Basu, S. Saha, J. N. Jenkins, D. B. Shoemaker, C. L. Cheatham, and J. C. McCarty Jr. Genetic Distance among Selected Cotton Genotypes and Its Relationship with F2 Performance Crop Sci., November 1, 2002; 42(6): 1841 - 1847. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Z. Cui, T. E. Carter Jr., and J. W. Burton Genetic Diversity Patterns in Chinese Soybean Cultivars Based on Coefficient of Parentage Crop Sci., November 1, 2000; 40(6): 1780 - 1793. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 O. L. May and R. A. Taylor Breeding Cottons with Higher Yarn Tenacity Textile Research Journal, April 1, 1998; 68(4): 302 - 307. [Abstract] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
