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Published in Crop Sci 25:923-926 (1985)
© 1985 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Yield Stability of Dry Bean Genotypes in the Dominican Republic1

J. S. Beaver, C. V. Paniagua, D. P. Coyne and G. F. Freytag2

The seed yield and stability of performance of dry bean (Phaseolus vulgaris L.) genotypes grown in the Dominican Republic were measured using data from the 1981–1982 and 1982–1983 growing seasons. Genotype-environment interactions were analyzed using regression techniques. Heterogeneity among regression coefficients accounted for a significant portion of the genotype-environment interaction. The determinate red-mottled genotypes that are grown widely in the Dominican Republic produced seed yields equal to or less than the mean of the tests, had an average yield response to environments of varying levels of productivity, and showed significant deviations from regression. On the other hand, indeterminate genotypes such as blackseeded ‘La Vega’ and white-seeded 2W-33-2 produced greater than average mean seed yields, had an average or greater than average response to environments of varying levels of productivity, and possessed minimum deviations from regression during both growing seasons. These results suggest that the development of indeterminate red-mottled genotypes might improve the yield level and stability of this bean class.

Key Words: Phaseolus vulgaris L. • Genotype-environment interaction • Seed Yield • Joint regression analysis

1 Joint contribution of Puerto Rico Agric. Exp. Stn., Mayaguez, PR 00708, Nebraska Agric. Exp. Stn., Lincoln, NE 68583, and the USDA-ARS. Published as Journal Series Paper no. 7235, Nebraska Agric. Exp. Stn. Research was supported in part by the Title XII Bean/Cowpea CRSP of the U.S. Agency for Int. Development under Grant no. AID/DSAN/XII-G-0261.

2 Assistant professor, Dep. of Agronomy and Soils, Univ. of Puerto Rico, Mayaguez, PR 00708; principal investigator, Title XII Bean/Cowpea Project, Secretaria de Estado de Agricultura, Arroyo Loro Exp. Stn., San Juan de la Maguana, Republics Dominicana; professor, Dep. of Horticulture, Univ. of Nebraska, Lincoln, NE 68503; and research geneticist, USDA-ARS, Trop. Agric. Res. Stn., Mayaguez, PR 00709.

Received for publication September 5, 1984.




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