Browsing by Autor "Matthew W. Blair"

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Contributors
(Elsevier BV, 2023) Peter Adeolu Adedibu; Tariq Aftab; Swati Agarwal; Eric Etchikinto Agoyi; David Adedayo Animasaun; Mahua Banerjee; Neelam Bhardwaj; Mahendar Singh Bhinda; Matthew W. Blair; Alejandro Bonifacio
Genetic Diversity of Bolivian Accessions of <i>Phaseolus</i> Species Evaluated with Fluorescent Microsatellite Markers
(Wiley, 2012) Matthew W. Blair; Andrea M. Dávila; Ximena Reyes; Teresa Ávila
ABSTRACT The Andes of South America is a center of origin for common beans ( Phaseolus vulgaris L.) and lima beans ( P. lunatus L.) that has been less well studied than other regions due to its high diversity and multitude of subenvironments. The objective of this study was to evaluate 174 accessions from five Phaseolus species native to Bolivia to determine their relationships and total genetic diversity using a set of 36 fluorescent microsatellite markers that are highly polymorphic and differentiate both between and within species. The results showed that the common beans were divided into a range of Andean groups and one disperse group of Mesoamerican accessions. The other species were well differentiated, including two scarlet runner beans ( P. coccineus L.), 22 lima beans, and wild relatives P. augusti Harms and P. bolivianus Piper. Within the Andean groups, accessions with bicolor seeds were frequent and were typical of race Peru, subgroup I. These “vaquita” type beans were different from other subrace Peru genotypes without bicolor seeds and were also different from type I growth habit beans from race Nueva Granada. This latter race was unexpected for the region as it is from the northern Andes but occurred with some frequency in Bolivia. The diversity of Phaseolus beans found in Bolivia is high with implications on germplasm conservation and the source of diversity in the Andean gene pool and in surrounding countries.
Registration of High Mineral Common Bean Germplasm Lines NUA35 and NUA56 from the Red‐Mottled Seed Class
(Wiley, 2010) Matthew W. Blair; Fredy Monserrate; Steve Beebe; José Restrepo; Juan Ortubé Flores
NUA35 (Reg. No. GP‐278, PI 657698) and NUA56 (Reg. No. GP‐279, PI 657699), are high seed mineral, red‐mottled common beans ( Phaseolus vulgaris L.) developed by the International Center for Tropical Agriculture (CIAT) in Cali, Colombia, and tested with various national agricultural research systems and nongovernmental organizations from Latin America and eastern and southern Africa as part of the Harvest Plus and Agrosalud programs for biofortification. Both germplasm lines were selected from the backcross population [‘CAL96’ × (CAL96 × G14519)] where CAL96 is a commercial cultivar in Colombia and Uganda, and G14519 is a high seed mineral germplasm accession from the CIAT genebank. The seed iron and zinc content of NUA35 and NUA56, along with CAL96 as a check, was determined over 15 sites with varying climate, altitude and soil types in Bolivia, Colombia, Costa Rica, and Guatemala using atomic absorption spectrophotometry. On average, iron content was 18 and 23 mg kg −1 higher for NUA35 and NUA56, respectively than for CAL96; while zinc content was 8 and 7 mg kg −1 higher, respectively. To our knowledge, these are the first germplasm lines to be bred specifically for nutritional quality in common beans.
SNP marker diversity in common bean (Phaseolus vulgaris L.)
(Springer Science+Business Media, 2011) Andrés J. Cortés; Martha C. Chavarro; Matthew W. Blair