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 Hanson, W. D. Search for Related Content PubMed Articles by Hanson, W. D. Agricola Articles by Hanson, W. D.

Distance Statistics and Interpretation of Southern States Regional Soybean Tests

Dep. of Genetics, Box 7614, North Carolina State Univ., Raleigh, NC 27-695-7614

^* Corresponding author.

The failure of genotypes to respond similarly to different environmental conditions, genotype environment (GXE) interaction, is an important aspect of genotypic stability. The objectives of this paper were to develop distances based on concepts of genotypic stability and to interpret regional soybean [Glycine max (L.) Merr.] tests based on these distances. Distances increased in relation to differential responses among sites for two genotypes or among genotypes for two sites. They were designed to evaluate the importance of region of origin in determining genotypic responses, the similarity of selections arising from different breeding programs, and the comparability of sites in regional testing. Seed yields for the Uniform Soybean Trials, Southern States, Maturity Groups V and VI, 1981–1991, were evaluated. Region of origin for genotypes did not have a major impact upon the nature of genotypic responses; however, genotypes from all regions showed less differential responses when tested at sites in the East Coast Region. The Group V selections from the North Carolina, Maryland, and Virginia breeding programs were more similar than selections from other breeding programs. Group VI selections from the Missouri program responded differently to environments than Group VI selections from other programs. The Plymouth, NC, Clemson, SC, and Athens, GA, test sites had similar relative seed yields among genotypes. A central belt of comparable sites extended from Virginia, North Carolina, South Carolina, and northeast Georgia to the mid and upper Delta Region. A northern belt of comparable sites covered Delaware, Maryland, western Virginia, Kentucky, upper Delta, and southeastern Kansas. The Tennessee sites were intermediate to these two belts. Sites in northwestern Georgia and northern Alabama and the remaining sites in the southern tier of states gave heterogeneous genotypic responses. Comparable sites that represent areas within this region were not found. Genotypes with unique local adaptations would be required.

Received for publication March 25, 1993.

This article has been cited by other articles:

				A. K. Joshi, G. Ortiz-Ferrara, J. Crossa, G. Singh, G. Alvarado, M. R. Bhatta, E. Duveiller, R. C. Sharma, D. B. Pandit, A. B. Siddique, et al. Associations of Environments in South Asia Based on Spot Blotch Disease of Wheat Caused by Cochliobolus sativus Crop Sci., May 31, 2007; 47(3): 1071 - 1081. [Abstract] [Full Text] [PDF]

				A. Collaku, S. A. Harrison, P. L. Finney, and D. A. Van Sanford Clustering of Environments of Southern Soft Red Winter Wheat Region for Milling and Baking Quality Attributes Crop Sci., January 1, 2002; 42(1): 58 - 63. [Abstract] [Full Text] [PDF]