GWAS of resistance to three bacterial diseases in the Andean common bean diversity panel.

Bacterial brown spot (BBS) caused by pv. (), common bacterial blight (CBB) caused by pv. () and subsp.

Seed color patterns in domesticated common bean are regulated by MYB-bHLH-WD40 transcription factors and temperature.

Seed colors and color patterns are critical for the survival of wild plants and the consumer appeal of crops. In common bean, a major global staple, these patterns are also essential in determining market classes, yet the genetic and environmental control of many pigmentation patterns remains unresolved. In this study, we genetically mapped variation for several important seed pattern loci, including T, Bip, p, and Z, which co-segregated with candidate genes PvTTG1, PvMYC1, PvTT8, and PvTT2, respectively.

Soybean pod shattering resistance allele pdh1 and marker-assisted selection.

Pod shattering is a major production constraint of soybean [ (L.)]. The objectives of this study were to (i) estimate heritability for pod shattering resistance, (ii) determine the frequency of the pod shattering resistance allele in the International Institute for Tropical Agriculture (IITA) soybean germplasm and Zambian commercial varieties, and (iii) determine the effectiveness of the DNA marker for the pod shattering resistance allele .

Genome-wide association analysis of anthracnose resistance in the Yellow Bean Collection of Common Bean.

Anthracnose caused by Colletotrichum lindemuthianum is a major disease of common bean (Phaseolus vulgaris) worldwide. Yellow beans are a major market class of common bean especially in eastern and southern Africa. The Yellow Bean Collection (YBC), which is comprised of 255 genotypes, and has not been used previously in genetic studies on anthracnose, is an excellent genetic resource for understanding the extent of anthracnose resistance and its genetic architecture in the yellow bean market class.

Identification of quantitative trait loci for drought tolerance in Bukoba/Kijivu Andean mapping population of common bean.

Quantitative Trait Loci "hotspots" for drought tolerance were identified on chromosomes Pv06, Pv07 and Pv10 of common bean. Drought is a major production constraint of common bean (Phaseolus vulgaris L.) worldwide.

Race Structure and Molecular Diversity of of Common Bean in Zambia.

Anthracnose, caused by the fungus , is a major disease of common bean ( L.) worldwide. is genetically highly variable, and understanding the pathogen's diversity and distribution is a key step in developing common bean varieties with durable anthracnose resistance.

Genome-Wide Identification of Powdery Mildew Resistance in Common Bean ( L.).

Genome-wide association studies (GWAS) have been utilized to detect genetic variations related to several agronomic traits and disease resistance in common bean. However, its application in the powdery mildew (PM) disease to identify candidate genes and their location in the common bean genome has not been fully addressed. Single-nucleotide polymorphism (SNP) genotyping with a BeadChip containing 5398 SNPs was used to detect genetic variations related to PM disease resistance in a panel of 211 genotypes grown under two field conditions for two consecutive years.

Characterization of Races in Zambia and Evaluation of the CIAT Core Collection for Resistance to Anthracnose.

, the causal pathogen of common bean () anthracnose, is highly variable. Therefore, understanding its race structure and identification of new sources of resistance is necessary for the development of varieties with durable resistance. The objectives of this study were (i) to characterize isolates of collected from three major bean-growing regions in Zambia and (ii) evaluate the International Center for Tropical Agriculture (CIAT) core collection for resistance to races 37, 73, and 566 and a blend of 20 races.

Genetic variability and genome-wide association analysis of flavor and texture in cooked beans (Phaseolus vulgaris L.).

Cooked bean flavor and texture vary within and across 20 Andean seed types; SNPs are significantly associated with total flavor, beany, earthy, starchy, bitter, seed-coat perception, and cotyledon texture. Common dry beans are a nutritious food recognized as a staple globally, but their consumption is low in the USA. Improving bean flavor and texture through breeding has the potential to improve consumer acceptance and suitability for new end-use products.

Identification of quantitative trait loci for symbiotic nitrogen fixation in common bean.

QTL were identified for symbiotic nitrogen fixation in common bean. These QTL were detected in both greenhouse and field studies, and many overlapped with previously reported QTL in diverse mapping populations. Common bean (Phaseolus vulgaris L.

Transcriptome analysis of two recombinant inbred lines of common bean contrasting for symbiotic nitrogen fixation.

Common bean (Phaseolus vulgaris L.) fixes atmospheric nitrogen (N2) through symbiotic nitrogen fixation (SNF) at levels lower than other grain legume crops. An understanding of the genes and molecular mechanisms underlying SNF will enable more effective strategies for the genetic improvement of SNF traits in common bean.

Transcriptome Profiling of the Phaseolus vulgaris - Colletotrichum lindemuthianum Pathosystem.

Bean (Phaseolus vulgaris) anthracnose caused by the hemi-biotrophic pathogen Colletotrichum lindemuthianum is a major factor limiting production worldwide. Although sources of resistance have been identified and characterized, the early molecular events in the host-pathogen interface have not been investigated. In the current study, we conducted a comprehensive transcriptome analysis using Illumina sequencing of two near isogenic lines (NILs) differing for the presence of the Co-1 gene on chromosome Pv01 during a time course following infection with race 73 of C.

Genome-Wide Association Study of Anthracnose Resistance in Andean Beans (Phaseolus vulgaris).

Anthracnose is a seed-borne disease of common bean (Phaseolus vulgaris L.) caused by the fungus Colletotrichum lindemuthianum, and the pathogen is cosmopolitan in distribution. The objectives of this study were to identify new sources of anthracnose resistance in a diverse panel of 230 Andean beans comprised of multiple seed types and market classes from the Americas, Africa, and Europe, and explore the genetic basis of this resistance using genome-wide association mapping analysis (GWAS).

Genome-wide association analysis of symbiotic nitrogen fixation in common bean.

Significant SNPs and candidate genes for symbiotic nitrogen fixation (SNF) and related traits were identified on Pv03, Pv07 and Pv09 chromosomes of common bean. A genome-wide association study (GWAS) was conducted to explore the genetic basis of variation for symbiotic nitrogen fixation (SNF) and related traits in the Andean Diversity Panel (ADP) comprising 259 common bean (Phaseolus vulgaris) genotypes. The ADP was evaluated for SNF and related traits in both greenhouse and field experiments.

Genome-Wide Association Study of Agronomic Traits in Common Bean.

A genome-wide association study (GWAS) using a global Andean diversity panel (ADP) of 237 genotypes of common bean (Phaseolus vulgaris L.) was conducted to gain insight into the genetic architecture of phenology, biomass, yield components, and seed yield traits. The panel was evaluated for 2 yr in field trials in Michigan and genotyped with 5398 single nucleotide polymorphism (SNP) markers.