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Effect of growth habit on yield of large-seeded bush cultivars of common bean

White, J.W. Y Kornegay, J. Y Castillo, J. Y Molano, C.H. Y Cajiao, C. Y Tejada, G. (1992) Effect of growth habit on yield of large-seeded bush cultivars of common bean. Field Crops Research, 29 (2). pp. 151-161. ISSN 03784290

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Abstract Among common bean cultivars (Phaseolus vulgaris L.) with bush growth habits, large-seeded cultivars usually give lower yields than small-seeded ones, especially in warm, tropical environments. One suggested cause of this yield difference is that the determinate stem type typical of large-seeded bush cultivars is somehow less efficient than the indeterminate habits usually associated with small-seeded cultivars. To evaluate this hypothesis, yields of five pairs of large-seeded near-isogenic lines of contrasting growth habits were compared over five trials at three sites in Colombia. To obtain evidence from a group of materials with a broader genetic background, an additional 19 indeterminate and five determinate medium- to large-seeded experimental lines were grown in five trials at the three sites. In comparisons of the near-isogenic lines, no effect of growth habit on yield was detected in any of the trials. Determinate growth habit, on the average, resulted in 4 days earlier maturity. For the evaluation of 24 lines, the mean yield of the determinate lines over the five locations was 1700 kg ha−1, significantly lower than the mean yield of 1890 kg ha−1 for the indeterminates. Determinates matured 5 days earlier than indeterminates. Stability analyses for both studies indicated greater variation in yield stability of indeterminete lines as compared to the determinates. In the 24-genotype study, several indeterminate lines combined both high and stable yields. While the results of the near-isogenic lines indicate that differences in growth habit are not sufficient to explain low yields in large-seeded cultivars, the comparison among 24 lines suggests that the genotypic variation present within indeterminate growth habits may offer greater potential for yield improvement of large-seeded bush types without loss of yield stability.

Tipo de Elemento: Artículo
Asunto: S Agricultura > S Agriculture (General)
S Agricultura > SD Forestry
Division: Facultad de Ciencias Agrícolas > Programa de Ingeniería Agroforestal > Productividad
Depósito de Usuario: Grupo Agroforestería y Recursos Naturales
Fecha Deposito: 12 Feb 2018 21:53
Ultima Modificación: 12 Feb 2018 21:53

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