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

This Article Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in Crop Science Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (7) Citing Articles via Google Scholar Google Scholar Articles by McCarty, J. C. Articles by Wu, J. Search for Related Content PubMed Articles by McCarty, J. C. Articles by Wu, J. Agricola Articles by McCarty, J. C. Articles by Wu, J. Related Collections Crop Genetics Cotton

CROP BREEDING, GENETICS & CYTOLOGY

Primitive Accession Derived Germplasm by Cultivar Crosses as Sources for Cotton Improvement

II. Genetic Effects and Genotypic Values

^a USDA-ARS, Crop Science Research Laboratory, P.O. Box 5367, Mississippi State, MS 39762
^b Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762

^* Corresponding author (JMcCarty{at}msa-msstate.ars.usda.gov).

Primitive accession derived germplasm of cotton, Gossypium hirsutum L., may provide useful traits for cultivar improvement. The ability to predict advanced generation performance when crossed with commercial cultivars would enhance their utility and encourage their use in breeding programs. Our objective for this study was to predict genetic effects for day-neutral derived lines derived from primitive accessions and crossed to cultivars using a mixed linear model approach. Parents and F₂ populations were grown at two field locations in 1998 and 1999 and parents and F₃s were grown at two locations in 2000. Lint yield, yield components, and fiber quality traits were evaluated. An additive-dominance additive x additive (ADAA) model was used for genetic analysis. A mixed linear model, minimum norm quadratic unbiased estimation (MINQUE) was used to predict genetic effects and genotype values. Generally, the female cultivar parents had higher additive effects for lint yield and lint percentage; however, these females generally had lower additive effects for fiber strength. Significant AA effects widely existed among parents and F₂ populations for lint percentage, boll weight, and fiber strength. The correlation coefficients between observed values and predicted values were mainly high among traits and environments. These data suggest that it is appropriate to use the ADAA genetic model to predict genetic effects and hybrid genotypic values for advanced generations. Our study showed that fiber strength may be significantly improved over that of the female parents, while the lint yield was slightly but not significantly predicted to be less than their female parents. This study suggested that day-neutral primitive germplasm accessions provided a valuable gene resource for selecting high yielding lines with significantly improved fiber strength.

Abbreviations: AA, additive x additive effect • AD, additive dominance model • ADAA, additive-dominance, additive x additive model • MINQUE, minimum norm quadratic unbiased estimation

Related articles in Crop Science:

THIS ISSUE IN CROP SCIENCE

Crop Science 2004 44: 1109-1112. [Full Text]  

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]

				J.C. McCarty and J.N. Jenkins Registration of 14 Primitive Derived Cotton Germplasm Lines with Improved Fiber Strength Crop Sci., October 27, 2005; 45(6): 2668 - 2669. [Full Text] [PDF]

				J. C. McCarty, J. N. Jenkins, and J. Wu Primitive Accession Derived Germplasm by Cultivar Crosses as Sources for Cotton Improvement: I. Phenotypic Values and Variance Components Crop Sci., July 1, 2004; 44(4): 1226 - 1230. [Abstract] [Full Text] [PDF]