ISSN:
1439-0523
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Increase in yield potential of dry common bean (Phaseolus vulgaris L.) cultivars has been either imperceptible or small and gradual, in spite of large variation of most traits, including seed yield. Therefore, general combining ability (GCA) of 80 cultivars and lines of mostly Middle-American origin was investigated. Eight sets of 10 entries each were used, with five parents each as females and males in a Design II mating system. The resulting 200 F, populations, excluding parents, were evaluated in a replicates-in-sets design for yield and its, components at two locations in Colombia. GCA was, calculated by Griffing's Method 4, Model I.Sixty-two parents, including high yielding and widely grown small-seeded Latin American cultivars (‘Aete 3’, ‘Carioca’, ‘Catu’, ‘ICA Pijao’, ‘IPA 74-19’, ‘Jamapa’, ‘Moruna 80’, ‘Porrillo Sintetico’. ‘Rio Tibagi’), new releases, and many sources of diseases, insect pests, and drought resistance, had zero or negative GCA for yield and its components at both locations. Seventeen out of the 18 parents that had positive GCA for yield at one or both locations were bred lines. At least nine of these resulted from a cross between a small-seeded cultivar with zero or negative GCA for yield, on one hind, and a landrace from the highlands of Mexico, on the other. Two such landraces, ‘Guanajuato 31’ and ‘Ojo deLiebre’, contributed positive GCA for seed yield and seed weight to all their lines studied, suggesting a major gene control.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1439-0523.1988.tb00280.x
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