scholarly journals Dissecting the genetic architecture of quantitative traits in common bean (>i/i< L.): response to root-knot nematode infection and seed morphology

2021 ◽  
Author(s):  
Willian Giordani
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Genetic Architecture ◽  
Quantitative Traits ◽  
Seed Morphology ◽  
Nematode Infection ◽  
Root Knot Nematode

Genetic diversity and phaseolin variation in Portuguese common bean landraces

2009 ◽  
Vol 7 (03) ◽  
pp. 230-236 ◽  
Author(s):  
G. Igrejas ◽  
V. Carnide ◽  
P. Pereira ◽  
F. Mesquita ◽  
H. Guedes-Pinto
Keyword(s):  
Genetic Diversity ◽  
Phaseolus Vulgaris ◽  
South America ◽  
Common Bean ◽  
Morphological Traits ◽  
Quantitative Traits ◽  
Seed Shape ◽  
Andean Region ◽  
Qualitative And Quantitative ◽  
Northern Portugal

A collection of 18 landraces of common bean (Phaseolus vulgarisL.) from northern Portugal was evaluated for both phaseolin pattern and a set of qualitative and quantitative traits. The phaseolin Contender and Tendergreen types were the most commonly occurring, with Boyaca and Huevo de Huanchaco present, but rare. The colour of the flower standard and wing, and seed shape, colour and size were all highly variable. On the basis of morphological traits, the landraces and testers clustered into two main groups. No relationship was found between phaseolin profile and any of the quantitative traits measured. Based on phaseolin patterns, the origin of Portuguese common bean populations was probably the Andean region of South America.

Genetic architecture of chalcone isomerase non-coding regions in common bean (Phaseolus vulgaris L.)

Genome ◽  
2007 ◽  
Vol 50 (2) ◽  
pp. 203-214 ◽  
Author(s):  
Phillip E. McClean ◽  
Rian K. Lee
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Genetic Architecture ◽  
Sequence Data ◽  
Balancing Selection ◽  
Chalcone Isomerase ◽  
Nucleotide Polymorphisms ◽  
Phaseolus Vulgaris L ◽  
Ancestral Gene ◽  
Coding Regions

Sequence data for 2 non-coding regions of the chalcone isomerase gene were analyzed to study the genetic architecture of common bean ( Phaseolus vulgaris L.). One region corresponded to the first 596 nucleotides (nt) of the 5′-untranslated region (UTR). The other region was the 710 nt intron 3. Data were collected from 67 genotypes representing both landraces and cultivars from the geographical range of the cultivated form of the species. Variability in the 5′-UTR region was represented by single nucleotide polymorphisms (SNPs), whereas intron 3 variation was due to a collection of SNPs and insertion–deletion events. Diversity was greater in the 5′-UTR (π = 0.0175) than in intron 3 (π = 0.0089). For each region, diversity was greater for genotypes of Middle American than Andean origin. A single recombination event was observed, and the hybridization pattern necessary to derive the recombinant genotypes supported the previous observation of an ancestral gene pool from which modern domesticated genotypes are derived. For both regions, a strongly supported Andean group was observed, whereas the presence of 2 Middle American subgroups was also supported. Although a significantly positive Tajima’s D statistic was observed for the 5′-UTR for all genotypes, we conclude that this is more likely the result of a strong demographic effect and that balancing selection is occurring only among the Middle American genotypes.

scholarly journals Effect of plant density on growth and yield attributes of common bean (Phaseolus vulgaris L.) genotypes

2020 ◽  
Vol 12 (2) ◽  
pp. 399-408
Author(s):  
Eric B. KOUAM ◽  
Alex B. TSAGUE-ZANFACK
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Seed Yield ◽  
Quantitative Traits ◽  
Plant Density ◽  
Growth And Yield ◽  
Phaseolus Vulgaris L ◽  
Yield Attributes ◽  
Biological Yield ◽  
Collar Diameter

Common bean (Phaseolus vulgaris L.) is an economically significant seed crop in tropical regions. With the objective of studying the effect of plant density on growth and yield characteristics of common bean, four common bean varieties (‘GLP190S’, ‘NITU’, ‘ECOPALM021’ and ‘NUA99’) collected from IRAD-Cameroon and four plant spacing distances (10 cm x 10 cm, 15 cm x 15 cm, 20 cm x 20 cm and 30 cm x 30 cm) corresponding respectively to four plant density (121, 49, 36 and 16 plants/m2) were evaluated for twelve quantitative traits in a randomly completed block design with three repetitions. ANOVA and correlation analysis were performed. Means values of each trait from the ANOVA analysis was submitted to the Tukey test at 5% probability level. The effect of variety was significant for all the twelve studied traits except the number of seed per plant. Pod length, plant height, number of seeds per pod and 100 seed weights were not affected by plant density while the numbers of seeds per plant, number of pods per plant, biological and seed yield were significantly affected by plant density. Interaction effect of plant variety and plant density on seed yield, biological yield, number of pods per plant and collar diameter was significant. No positive correlation was found between plant density and any of the studied traits. Leaf width, collar diameter, number of functional leaves and number of pods per plant inversely correlated with plant density. At the lowest plant density (16 plant/m2), seed yield and biological yield correlated poorly with related quantitative traits comparing to higher plant densities. From all the studied varieties, only ‘ECOPALM021’ showed the seed yield not affected by plant density. This study also showed that the higher seed yield and important biological yield was at 16 plants/m2 plant density.

scholarly journals Occurrence of Meloidogyne enterolobii in common bean in southern Goiás State, Brazil

2021 ◽  
Vol 51 (10) ◽  
Author(s):  
Rodrigo Vieira da Silva ◽  
José Orlando de Oliveira ◽  
José Humberto de Ávila Júnior ◽  
Brenda Ventura de Lima ◽  
Nádia Fernandes Moreira
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Malate Dehydrogenase ◽  
Root Systems ◽  
Nematode Species ◽  
Root Surface ◽  
The State ◽  
Root Knot Nematode ◽  
Varying Thickness ◽  
Meloidogyne Enterolobii

ABSTRACT: Meloidogyne enterolobii is known as the most aggressive root-knot nematode (RKN) in Brazil. Common bean (Phaseolus vulgaris) cultivated in the experimental field in Morrinhos, Southern Goiás State, exhibited symptoms typical to those caused by RKN. In order to clarify the etiology of the disease, root systems were analyzed. Typical galls of varying thickness were observed, with thickening larger than 3 cm in diameter containing RKN females inside roots and egg masses on the root surface. The identification of the nematode species was confirmed by isoenzyme electrophoresis (esterase and malate dehydrogenase phenotypes). This is the first report of M. enterolobii in Goiás and in Brazil parasitizing common bean under field conditions. This result is an alert to producers and to the State phytosanitary defense authorities, in order to prevent the further dissemination of this pest, especially in fields of common bean and industrial tomato in the State.

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