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Advanced backcross QTL analysis was used to identify quantitative trait loci (QTL) for agronomic performance in a population of BC2F3:5 introgression lines created from the cross of a Colombian large red-seeded commercial cultivar, ICA Cerinza, and a wild common bean accession, G24404. A total of...


Blair, Matthew W.Iriarte Solórzano, G.A.Beebe, Stephen E.[QTL analysis of yield traits in an advanced backcross population derived from a cultivated Andean x wild common bean (Phaseolus vulgaris L.) cross]QTL analysis of yield traits in an advanced backcross population derived from a cultivated Andean x wild common bean (Phaseolus vulgaris L.) cross

Nitrogen deficiency severely limits production of the bean maize association grown by small-scale farmers in upland Peru. Sixty-four bean Rhizobium isolates were evaluated for induction of a plant growth response in pots of soil from the area and 14 of the most promising strains of these were tes...


Pineda, PKipe-Nolt, Judith A.Rojas Alvarado, E[Rhizobium inoculation increases of bean and maize yields in intercrops on farms in the Peruvian Sierra]Rhizobium inoculation increases of bean and maize yields in intercrops on farms in the Peruvian Sierra

Varietal selection is particularly difficult for very heterogeneous environments where farmers have a range of preferences. To address these issues in Rwanda, local bean experts, generally women, are invited to the research station to assess cultivars and to select those they prefer for their plo...


Sperling, L.Loevinsohn, MENtabomvuras, B[Rethinking the farmer's role in plant breeding : local bean experts and on-station selection in Rwanda]Rethinking the farmer's role in plant breeding : local bean experts and on-station selection in Rwanda

More than 60 accessions of tepary bean (Phaseolus acutifolius) and five cultivars of common bean (P. vulgaris) were evaluated for disease reactions to different races of wilt-causing Fusarium (F. oxysporum f. sp. phaseoli) under glasshouse conditions; 95% of the tepary accessions were resistant. ...


Salgado, MOSchwartz, Howard F.Brick, Mark A.Pastor Corrales, Marcial A.[Resistance to Fusarium oxysporum f. sp. phaseoli in tepary beans (Phaseolus acutifolius)]Resistance to Fusarium oxysporum f. sp. phaseoli in tepary beans (Phaseolus acutifolius)

Host plant resistance in common bean (Phaseolus vulgaris L.) is a promising component in an integrated cropping system for managing thrips (Thrips palmi Karny) infestation. This study was conducted to identify quantitative trait loci (QTLs) for resistance to thrips in common bean, using F5:7 reco...


Frei, AMBlair, Matthew W.Cardona Mejía, CésarBeebe, Stephen E.Gu, HDorn, S.[QTL mapping of resistance to Thrips palmi karny in common bean]QTL mapping of resistance to Thrips palmi karny in common bean

A survey of root-knot nematodes associated with bean (Phaseolus vulgaris) roots and soils in the major bean production regions of Colombia and Peru was conducted during 1988 1989. Over 150 samples were processed for these parasites, and specimens from more than 100 of the collections were identif...


Mullin, BAAbawi, G.S.Pastor Corrales, Marcial A.Kornegay, Julia L.[Root-knot nematodes associated with beans in Colombia and Peru and related yield loss]Root-knot nematodes associated with beans in Colombia and Peru and related yield loss

Seed analysis can indicate differences in micronutrient availability between soils. Comparison of Phaseolus vulgaris L. with published analytical data indicated that the micronutrients most limiting for N2-fixation and growth in parts of East and soLithem Africa were Mo and Cu. Significant differ...


Brodrick, SJAmijee, FKipe-Nolt, Judith A.Giller, Ken E.[Seed analysis as a means of identifying micronutrient deficiencies of Phaseolus vulgaris L. in the tropics]Seed analysis as a means of identifying micronutrient deficiencies of Phaseolus vulgaris L. in the tropics

Common bean (Phaseolus vulgaris L.) germplasm was screened for resistance to charcoal rot (Macrophomina phaseolina) under field conditions at Kiboko and Katumani, eastern Kenya. Of the 313 bean accessions evaluated, 50 lines were resistant and six were tolerant to M. phaseolina, the charcoal rot ...


Songa, WAHillocks, RJMwang'ombe, A.W.Buruchara, Robin A.Ronno, WK[Screening common bean accessions for resistance to charcoal rot (Macrophomina phaseolina) in Eastern Kenya]Screening common bean accessions for resistance to charcoal rot (Macrophomina phaseolina) in Eastern Kenya

Low soil P availability is a primary constraint to common bean (Phaseolus vulgaris L.) production in Latin America and Africa. Substantial genotypic variation in bean adaptation to low phosphorus (LP) availability has been linked with root traits that enhance the efficiency of soil foraging. The ...


Beebe, Stephen E.Rojas, MYan, XBlair, Matthew W.Pedraza García, FabioMuñoz Arboleda, FernandoTohme, Joseph M.Lynch, Jonathan P.[Quantitative trait loci for root architecture traits correlated with phosphorus acquisition in common bean]Quantitative trait loci for root architecture traits correlated with phosphorus acquisition in common bean

An estimated 60% of common bean (Phaseolus vulgaris L.) production worldwide is at risk of drought. A breeding program was developed at the International Center of Tropical Agriculture (CIAT) to create drought resistant breeding lines with varietal potential in the small red, small black, cream (...


Beebe, Stephen E.Rao, Idupulapati M.Cajiao V., César HernandoGrajales, Miguel A.[Selection for drought resistance in common bean also improves yield in phosphorus limited and favorable environments]Selection for drought resistance in common bean also improves yield in phosphorus limited and favorable environments

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