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Published in Crop Sci 7:125-130 (1967)
© 1967 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Genotype x Environment Interactions in the Regional Testing of Soybean Strains1

W. M. Schutz and R. L. Bernard2

Estimates of genotype x environment interactions were obtained from seven regional Uniform Soybean Tests grown in 1954-56. All of the second order and nearly all of the first order interactions were significantly different from zero at the .05 level of probability. Estimates of the genotype x year interactions were generally smaller than estimates of the genotype x location interactions but in practice will have a greater effect on the error variance of a line mean, since testing over a long period of time is seldom done.

Evidence was cited to suggest that locations may be effectively substituted for years in regional tests to permit a rapid turnover of breeding material and that data from 10 to 15 locations in a single year should be sufficient to eliminate low-yielding strains.

Key Words: genotype x environment interactions • soybean • Glycine max (L.) Merrill

1 Joint contribution from the Crops Research Division, ARS, USDA, Genetics Department, North Carolina Agricultnral Experiment Station and the U. S. Regional Soybean Laboratory, Urbana, I11. Published with the approval of the Director of Research as Paper No. 2249 of the Journal Series. Journal Paper No. 457 of the U. S. Regional Soybean Laboratory. The authors gratefully acknowledge personnel in 22 states and Canada for conducting tests and obtaining the data upon which this paper is based. This investigation was supported in part by Public Health Service Research Grant No. GM 11546 from the division of General Medical Sciences.

2 Research Geneticists, Crops Research Division, ARS, USDA, Raleigb, N. C., and Urbana, I11., respectively.

Received for publication August 12, 1966.


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T. C. Helms and J. J. Hammond
Genetic Gain Equation with Correlated Genotype x Environment Effects
Crop Sci., March 27, 2006; 46(3): 1137 - 1142.
[Abstract] [Full Text] [PDF]


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