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With the objective of selecting superior recombinant lines of snap bean, four segregating F2 populations were selected by early generation testing and advanced by single seed descent. In a randomized complete block design with two replications within sets 120 F6:7 lines were obtained and evaluated for seven traits of agronomic interest. The mean pod yield of the F6:7 generation was 72% higher than...
Dry bean (Phaseolus vulgaris L.) is an important grain legume for small-scale farmers in eastern Africa who nonetheless, grow beans with limited phosphorus (P) fertilizer supply or none at all. Phosphorus rank second, after nitrogen (N), as the most limiting soil nutrient in bean production in East African soils. This study was conducted to determine combining ability for five polygenic traits in...
Diseases are major production constraints of pinto bean despite 75 years of breeding. The objectives were to (1) assess progress made and (2) discuss future breeding strategies. Bean common mosaic virus (BCMV), anthracnose, rust, white mold, common blight, and halo blight and growth habit, seed weight, and seed coat darkening were evaluated for 52 cultivars released between 1944 and 2001. Sixteen...
Breeding efforts to improve resistance in dry bean to common bacterial blight (CBB) have focused on applying marker assisted selection strategies. We examined the interaction between two independent QTL (quantitative trait loci), SAP6 and SU91, on the expression of resistance to CBB in a pinto bean F2 population and dark red kidney bean F2 population. The disease reaction for each F2 population was...
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