Root traits of common bean genotypes used in breeding programs for disease resistance

Vieira, Rogério Faria; Carneiro, José Eustáquio Souza; Lynch, Jonathan P.

doi:10.1590/s0100-204x2008000600006

Cited by 17 publications

(11 citation statements)

References 19 publications

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“…Twenty common bean genotypes were assessed (Table 1). Among them, G 4000 and G 2333 were used as a standard for efficiency, and the Dor 364 genotype was used as a standard of inefficiency, as it is characterized as having roots with little vigor (Vieira et al, 2007 andVieira et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

Efficiency in the use of phosphorus by common bean genotypes

Silva¹,

Esteves²,

Messias

et al. 2014

Sci. agric. (Piracicaba, Braz.)

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Common bean (Phaseolus vulgaris L.) is frequently grown in weathered soils with low phosphorus (P) availability, and this is one of the main limitations on its production. This study aimed to assess 20 common bean genotypes in a hydroponic system to select the best P concentration for inducing nutritional deficiency and to classify the genotypes in terms of nutrient utilization efficiency. The concentrations of P applied were 8.00, 4.00, 2.00 and 0.05 mg L -1. At 21 days, in the plot subjected to an application of the most severe stress, the 0.05 mg L -1 dose of P, had smaller plant size and early leaf abscission was observed. The 4.00 mg L -1 dose of P was the most efficient in inducing stress for discrimination of cultivars in terms of efficiency of use of P. The following genotypes: IAPAR 81, Carioca Comum, IAC Carioca Tybatã, IAC Imperador and G 2333 stood out as being efficient and responsive to P, while the two cultivars DOR 364 and Jalo Precoce were the most inefficient and unresponsive.

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Section: Methodsmentioning

confidence: 99%

Efficiency in the use of phosphorus by common bean genotypes

Silva¹,

Esteves²,

Messias

et al. 2014

Sci. agric. (Piracicaba, Braz.)

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“…A total of 55 and 64 genotypes had averages greater than or equal to 3 whorls and 10 basal roots, respectively. Vieira et al (2008) reported that the number of whorls varied from 1.47 to 3.07, and the number of basal roots ranged from 5.67 (genotype TO) to 12.07 (cultivar Jalo MG-65) for 19 common beans genotypes. The Mahalanobis distance matrix and the Tocher cluster analysis (optimization) revealed seven different clusters for these two traits (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Research Article Root characterization of bean genotypes (<i>Phaseolus vulgaris</i>) under drought stress

Teixeira¹,

Silva²,

Gonçalves³

et al. 2019

Genet. Mol. Res.

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The morpho-agronomic characterization of gene banks is a key step in enabling breeding programs to efficiently exploit genetic resources. Several studies have evaluated the root system traits of the common bean to develop genotypes better adapted to drought. We examined the root systems of 1000 common bean accessions, from the Agronomic Institute of Campinas gene bank to: count the number of whorls and basal roots, estimate the divergence between accessions and evaluate the 47 most divergent genotypes under drought. The average numbers of whorl and basal roots for the 1,000 accessions were 2.07 and 8.09, respectively. Seven different clusters were identified using the Mahalanobis genetic divergence analysis and the Tocher optimization method, from which the 47 most divergent genotypes were selected. Both genotype and water treatments, in the pre-blooming period, significantly affected root length, root surface area, root volume, number of pods, seeds per plant and grain yield. However, only water treatment significantly affected stomatal conductance, with water treatment x genotype interaction only having a significant effect on this characteristic. Water deficit reduced the average grain yield by 52%; the most promising genotypes under water deficit considering both root growth and grain yield were: RAI 76,

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“…Genotypic differences have been reported in common bean germplasm for root biomass, root to shoot ratio (Nielsen et al, 2001;Yan et al, 2005), root area and root radius (Araújo et al, 1998;Araújo & Teixeira, 2000), root morphology (Stoffella et al, 1979), root architecture and topology (Lynch & van Beem, 1993), basal root gravitropism (Liao et al, 2001), number of basal roots and basal root growth angle (Vieira et al, 2008), and root distribution throughout the soil profile (Sponchiado et al, 1989;Guimarães et al, 1996). Evidence indicates that root growth in common bean is heritable, although controlled by many genes with quantitative inheritance (Beebe et al, 2006).…”

Section: Introducionmentioning

confidence: 99%

Variability of root traits in common bean genotypes at different levels of phosphorus supply and ontogenetic stages

Trindade

Araújo

2014

Rev. Bras. Ciênc. Solo

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SUMMARYSelection of common bean (Phaseolus vulgaris L.) cultivars with enhanced root growth would be a strategy for increasing P uptake and grain yield in tropical soils, but the strong plasticity of root traits may compromise their inclusion in breeding programs. The aim of this study was to evaluate the magnitude of the genotypic variability of root traits in common bean plants at two ontogenetic stages and two soil P levels. Twenty-four common bean genotypes, comprising the four growth habits that exist in the species and two wild genotypes, were grown in 4 kg pots at two levels of applied P (20 and 80 mg kg -1 ) and harvested at the stages of pod setting and early pod filling. Root area and root length were measured by digital image analysis. Significant genotype × P level and genotype × harvest interactions in analysis of variance indicate that the genotypic variation of root traits depended on soil nutrient availability and the stage at which evaluation was made. Genotypes differed for taproot mass, basal and lateral root mass, root area and root length at both P levels and growth stages; differences in specific root area and length were small. Genotypes with growth habits II (upright indeterminate) and III (prostrate indeterminate) showed better adaptation to limited P supply than genotypes of groups I (determinate) and IV (indeterminate climbing). Between the two harvests, genotypes of groups II and III increased the mass of basal and lateral roots by 40 and 50 %, respectively, whereas genotypes of groups I and IV by only 7 and 19 %. Values of the genotypic coefficient of determination, which estimates the proportion of phenotypic variance resulting from genetic effects, were higher at early pod filling than at pod setting. Correlations between shoot mass and root mass, which could indicate indirect selection of root systems via aboveground biomass, were higher at early pod filling than at pod setting. The results indicate that selection for root traits in common bean genotypes should preferentially be performed at the early pod-filling stage.Index terms: growth habit, Phaseolus vulgaris, phosphorus efficiency, root system.

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Root traits of common bean genotypes used in breeding programs for disease resistance

Cited by 17 publications

References 19 publications

Efficiency in the use of phosphorus by common bean genotypes

Efficiency in the use of phosphorus by common bean genotypes

Research Article Root characterization of bean genotypes (<i>Phaseolus vulgaris</i>) under drought stress

Variability of root traits in common bean genotypes at different levels of phosphorus supply and ontogenetic stages

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