Adaptability and stability of performance of field bean phaseolus vulgaris varieties and varietal mixtures in the zona da mata area state of minas gerais brazil

Pessanha, G.G.; Vieira, C.; Silva, C.C.D.; Cardoso, A.A.; Silva, J.C.; Sediyama, C.S.

Pesquisa Agropecuaria Brasileira 16(5): 683-692


ISSN/ISBN: 0100-204X
Accession: 004673532

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A study was carried out on the cultivars Ricopardo 896, Ricobaio 1014, Costa Rica 1031, Manteigao Fosco 11, Manteigao 977, Jalo and 2 mixtures of these varieties, 896+1014+1031 and 11+977+Jalo, which consisted of equal proportions of each component. These were tested in 8 environments. No significant difference in yield was found among the mixtures and their components, but blending of varieties apparently had some yield advantage. 'Ricopardo 896' and 'Costa Rica 1031' were the most responsive to environmental improvement; 'Ricobai 1014' and 'Manteigao 977' were the least responsive. Only 'Ricobaio 1014' showed stability of performance in the various environments; it was generally the dominant component in a mixture. In the other mixture the dominant was either 'Manteigao 977' or 'Jalo'. The same study, repeated in 8 simulated environments (4 levels of fertilization .times. 2 planting seasons) at Vicosa, in the same area, gave different results.