Effect of arbuscular mycorrhizas on P use efficiency for growth and N2 fixation in common bean (Phaseolus vulgaris L.)

2012 ◽  
Vol 7 (16) ◽  
Author(s):  
Fatma Tajini
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
N2 Fixation ◽  
Arbuscular Mycorrhizas ◽  
Phaseolus Vulgaris L ◽  
P Use Efficiency ◽  
Use Efficiency

scholarly journals Genetic Diversity, Nitrogen Fixation, and Water Use Efficiency in a Panel of Honduran Common Bean (Phaseolus vulgaris L.) Landraces and Modern Genotypes

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1238 ◽  
Author(s):  
Jennifer Wilker ◽  
Sally Humphries ◽  
Juan Rosas-Sotomayor ◽  
Marvin Gómez Cerna ◽  
Davoud Torkamaneh ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Nitrogen Fixation ◽  
Phaseolus Vulgaris ◽  
Water Use Efficiency ◽  
Common Bean ◽  
Water Use ◽  
Agronomic Traits ◽  
Snp Array ◽  
Phaseolus Vulgaris L ◽  
Use Efficiency

Common bean (Phaseolus vulgaris L.) provides critical nutrition and a livelihood for millions of smallholder farmers worldwide. Beans engage in symbiotic nitrogen fixation (SNF) with Rhizobia. Honduran hillside farmers farm marginal land and utilize few production inputs; therefore, bean varieties with high SNF capacity and environmental resiliency would be of benefit to them. We explored the diversity for SNF, agronomic traits, and water use efficiency (WUE) among 70 Honduran landrace, participatory bred (PPB), and conventionally bred bean varieties (HON panel) and 6 North American check varieties in 3 low-N field trials in Ontario, Canada and Honduras. Genetic diversity was measured with a 6K single nucleotide polymorphism (SNP) array, and phenotyping for agronomic, SNF, and WUE traits was carried out. STRUCTURE analysis revealed two subpopulations with admixture between the subpopulations. Nucleotide diversity was greater in the landraces than the PPB varieties across the genome, and multiple genomic regions were identified where population genetic differentiation between the landraces and PPB varieties was evident. Significant differences were found between varieties and breeding categories for agronomic traits, SNF, and WUE. Landraces had above average SNF capacity, conventional varieties showed higher yields, and PPB varieties performed well for WUE. Varieties with the best SNF capacity could be used in further participatory breeding efforts.

Time course of N2 fixation in common bean (Phaseolus vulgaris L.)

1993 ◽  
Vol 152 (1) ◽  
pp. 115-121 ◽  
Author(s):  
J. J. Pe�a-Cabriales ◽  
O. A. Grageda-Cabrera ◽  
V. Kola ◽  
G. Hardarson
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
N2 Fixation ◽  
Time Course ◽  
Phaseolus Vulgaris L
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