Seedling root architecture and its relationship with seed yield across diverse environments in Phaseolus vulgaris

Strock, Christopher F.; Burridge, James; Massas, Anica Sandra F.; Beaver, James S.; Beebe, Steve; Camilo, Samuel Alves; Fourie, D.; Jochua, Celestina Nhagupana; Miguel, Magalhaes Amade; Miklas, Phillip N.; Mndolwa, Eninka; Nchimbi‐Msolla, Susan; Polanía, José A.; Porch, Tim; Rosas, Juan Carlos; Trapp, Jennifer J.; Lynch, Jonathan P.

doi:10.1016/j.fcr.2019.04.012

Cited by 73 publications

(78 citation statements)

References 68 publications

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“…Across the two field sites in the present study, we observe that measurements of basal whorls and basal roots, as well as root rot disease scoring, were comparable for genotypes grown at both locations (Table 2). These results parallel a previous report of stability for measurements of BRN taken between seedlings and field‐grown plants (Strock et al., 2019) and further validate results from Miguel et al. (2013) showing that BRN is unaffected by many soil variables.…”

Section: Discussionsupporting

confidence: 90%

“…The observed phenotypic differences by group and geographic region in the present study provide empirical evidence for the theory that there is no single root phenotype that is ideal across all environments (Dathe, Postma, Postma‐Blaauw, & Lynch, 2016; Rangarajan et al., 2018; Strock et al., 2019). Furthermore, the variation that exists within races and origins also supports the concept that multiple integrated phenotypes can achieve similar strategies of resource acquisition and perform equally well in a single environment.…”

Section: Discussionsupporting

confidence: 66%

“…Although these relationships between individual root phenes are notable, broader understanding of soil foraging strategies is more appropriately conceptualized as the interaction among multiple root phenes that constitute an integrated root phenotype (York, Nord, & Lynch, 2013). The value of consideration of integrated phenotypes for improved crop yield under edaphic stress has been previously demonstrated in seedlings of this species (Strock et al., 2019), as well as in field‐grown maize ( Zea mays L.) (Burton, Brown, & Lynch, 2013; Klein, Schneider, Perkins, Brown, & Lynch, 2020). Unsupervised cluster analysis grouped gene pools and races by their aggregate root phenotype (Figures 5 and 6).…”

Section: Discussionmentioning

confidence: 90%

“…Root phenotypes can affect crop yield under abiotic stress by altering the metabolic efficiency of soil exploration and placing roots in soil domains where limiting resources are most available (Lynch, 2018; Nielsen, Lynch, Jablokow, & Curtis, 1994; Nielsen, Eshel, & Lynch, 2001; Strock et al., 2019). In production environments where yields are limited, P, N, and water are the resources most often limiting plant growth (Lynch, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Root phenotypic diversity in common bean reveals contrasting strategies for soil resource acquisition among gene pools and races

2020

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Although genetic diversity for aboveground traits has been well characterized in common bean (Phaseolus vulgaris L.), little is known about population‐specific variation within this species for root architecture. To assess the diversity of root phenotypes, a total of 196 accessions from a core collection were evaluated in the laboratory and field in Pennsylvania, USA, and Chokwe, Mozambique. Substantial phenotypic variation for 15 root phenes exists among gene pools, races, and genotypes. Principal component analysis revealed that Andean and Mesoamerican gene pools and races have distinct integrated root phenotypes. Unsupervised cluster analyses of root phenes identified five groups with distinct integrated root phenotypes and soil foraging strategies. Although integrated phenotypes associated with adaptation to drought and low P availability were found in both gene pools, phenotypes for drought adaptation were more prevalent among Mesoamerican accessions, whereas phenotypes for adaptation to suboptimal P were more common among Andean accessions. These genotypic differences in root phenotypes reflect contrasting strategies for soil resource acquisition and may possibly have evolved as an adaptation to the edaphic conditions in the environments to which Andean and Mesoamerican gene pools are endemic. This diversity of root architectural strategies for soil exploration can serve as an important resource for breeding programs and hybridization between gene pools may result in the generation of novel root phenotypes with improved soil resource acquisition.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Root phenotypic diversity in common bean reveals contrasting strategies for soil resource acquisition among gene pools and races

2020

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“…Under heat stress, adventitious root number had a positive relationship (13%) with seed yield. Mesoamerican genotypes of common bean yielded higher than Andean genotypes under heat stress (Strock et al, 2019). In canola, heat stress reduced stem diameter by 8.4%, cross-sectional area by 17.3%, and aboveground biomass by 11.5% in two genotypes; genotype 13C204 (heat-sensitive) had smaller stem diameter, cross-sectional area, root length, root surface area, root biomass, and root volume than Invigor 5440 (heat-tolerant) (Wu et al, 2017).…”

Section: Root System Architecturementioning

confidence: 93%