La colección INIFAP de frijol ayocote (Phaseolus coccineus L.) I. Distribución geográfica de sitios de colecta

Vázquez, Ma. Luisa Patricia Vargas; Martínez, José Socorro Muruaga; Ildefonso, Rogelio Lépiz; Guerrero, Alfredo Pérez

doi:10.29312/remexca.v3i6.1375

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Probably, breeding practices have acted over specific regions rather than over all the genome. The individuals of this breeding line did not present mixed ancestry, despite that Blanco Tlaxcala was developed using a multi linear method ( Vargas-Vázquez et al, 2012 ). This suggests that all lines used to generate Blanco Tlaxcala belonged to the same genetic cluster (Cult-SMOCC), and they were submitted to several rounds of strong selection, decreasing genetic variation.…”

Section: Discussionmentioning

confidence: 99%

“…In Mexico, the scarlet runner bean is cultivated both as a self-sufficiency crop by smallholder farmers (<5 ha) and also commercially for urban areas. Besides its native cultivars, in Mexico there is one breeding line (Blanco Tlaxcala) developed using a multi linear method ( Vargas-Vázquez et al, 2012 ). Feral populations are common, but it is unknown if they originated from hybridization between wild and domesticated populations, or if they escaped from cultivation.…”

Section: Introductionmentioning

confidence: 99%

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Domestication Genomics of the Open-Pollinated Scarlet Runner Bean (Phaseolus coccineus L.)

et al. 2017

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The runner bean is a legume species from Mesoamerica closely related to common bean (Phaseolus vulgaris). It is a perennial species, but it is usually cultivated in small-scale agriculture as an annual crop for its dry seeds and edible immature pods. Unlike the common bean, P. coccineus has received little attention from a genetic standpoint. In this work we aim to (1) provide information about the domestication history and domestication events of P. coccineus; (2) examine the distribution and level of genetic diversity in wild and cultivated Mexican populations of this species; and, (3) identify candidate loci to natural and artificial selection. For this, we generated genotyping by sequencing data (42,548 SNPs) from 242 individuals of P. coccineus and the domesticated forms of the closely related species P. vulgaris (20) and P. dumosus (35). Eight genetic clusters were detected, of which half corresponds to wild populations and the rest to domesticated plants. The cultivated populations conform a monophyletic clade, suggesting that only one domestication event occurred in Mexico, and that it took place around populations of the Trans-Mexican Volcanic Belt. No difference between wild and domesticated levels of genetic diversity was detected and effective population sizes are relatively high, supporting a weak genetic bottleneck during domestication. Most populations presented an excess of heterozygotes, probably due to inbreeding depression. One population of P. coccineus subsp. striatus had the greatest excess and seems to be genetically isolated despite being geographically close to other wild populations. Contrasting with previous studies, we did not find evidence of recent gene flow between wild and cultivated populations. Based on outlier detection methods, we identified 24 domestication-related SNPs, 13 related to cultivar diversification and eight under natural selection. Few of these SNPs fell within annotated loci, but the annotated domestication-related SNPs are highly expressed in flowers and pods. Our results contribute to the understanding of the domestication history of P. coccineus, and highlight how the genetic signatures of domestication can be substantially different between closely related species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Domestication Genomics of the Open-Pollinated Scarlet Runner Bean (Phaseolus coccineus L.)

et al. 2017

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“…Por su parte, Spataro et al (2011) desarrollaron una colección núcleo de frijol ayocote con 228 accesiones (52 de Mesoamérica y 148 de Europa) y se ha confirmado la diferenciación genética entre ambos acervos genéticos (Rodriguez et al, 2013;Mercati et al, 2015) y diferenciación entre poblaciones debido a su estructuración genética (Catarcione et al, 2013;Mercati et al, 2015). En Mexico también se estructuró una colección nacional de P. coccineus que incluye 798 accesiones, y donde alrededor del 80% proviene de las regiones del eje Neovolcánico y la Sierra Madre Oriental (Vargas-Vázquez et al, 2012). El frijol ayocote del Carso Huasteco se subdivide en dos grupos: uno que incluye germoplasma con ciclo de vida tardío y regiones con temperaturas mínimas de 2-5°C con semillas y vainas grandes y otro grupo con genotipos precoces que se colectaron en sitios con temperaturas mínimas de 0 a -2°C, así como semillas y vainas pequeñas (Ruíz-Salazar et al, 2010;Vargas-Vázquez et al, 2011;.…”

Section: Introductionunclassified

ANÁLISIS DE LA ESTRUCTURA POBLACIONAL DEL FRIJOL AYOCOTE (Phaseolus coccineus L.) MEDIANTE AFLP.

et al. 2019

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RESUMEN: El frijol ayocote (Phaseolus coccineus L.; 2n=2x=22) es una leguminosa originaria de las zonas altas de México; es una especie que ha sido poco estudiada a pesar de su importancia para consumo humano y el uso potencial en el mejoramiento de la resistencia de Phaseolus a enfermedades y factores abióticos (tolerancia a bajas temperaturas). El objetivo del presente estudio fue determinar la estructura poblacional de 117 colectas de P. coccineus correspondientes a 15 localidades del Carso Huasteco del estado de Puebla, México, más cinco testigos para conocer el grado de variablidad genética existente en germoplasma criollo mexicano de P. coccineus mediante la técnica de polimorfismos en longitud de fragmentos amplificados (AFLP). La estructura poblacional indicó un valor delta K = 3. El polimorfismo fue del 87.4% y el AMOVA confirmó la baja diferenciación genética entre accesiones (F st = 0.067), la varianza explicada entre y dentro de poblaciones fue 6.7 y 93.3%, respectivamente. El análisis de conglomerados no mostró agrupamientos definidos con base en el origen del germoplasma.

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Comparative analysis of drought responses in Phaseolus vulgaris (common bean) and P. coccineus (runner bean) cultivars

Morosan

Hassan

Gutiérrez–Naranjo

et al. 2017

The EuroBiotech Journal

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Genetic improvement of crop drought tolerance has become an urgent need for increasing agricultural yields and food production, to feed a growing human population in the context of global climate change. To get insights into the most relevant mechanisms underlying drought resistance in beans, we have analysed the responses to water deficit of three Phaseolus vulgaris (common bean) and one P. coccineus (runner bean) cultivars, focusing on the accumulation of specific osmolytes, a conserved response to abiotic stress in plants. Changes in osmolyte levels were correlated with the relative tolerance to water stress of the studied cultivars. Drought tolerance in Phaseolus largely depends on the accumulation of myo-inositol; glycine betaine may also contribute to tolerance in P. coccineus (but not in P. vulgaris). Proline, another common osmolyte, is a reliable marker of the level of stress affecting bean plants, but is not directly involved in tolerance mechanisms, as its drought-dependent accumulation is lowest in the most tolerant cultivar. We suggest that, by measuring the levels of proline and myo-inositol in water-stressed plants, a large number of cultivars could be easily and rapidly screened to select promising candidates to be used in breeding programmes for improving drought tolerance in beans.

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La colección INIFAP de frijol ayocote (Phaseolus coccineus L.) I. Distribución geográfica de sitios de colecta

Cited by 5 publications

References 2 publications

Domestication Genomics of the Open-Pollinated Scarlet Runner Bean (Phaseolus coccineus L.)

Domestication Genomics of the Open-Pollinated Scarlet Runner Bean (Phaseolus coccineus L.)

ANÁLISIS DE LA ESTRUCTURA POBLACIONAL DEL FRIJOL AYOCOTE (Phaseolus coccineus L.) MEDIANTE AFLP.

Comparative analysis of drought responses in Phaseolus vulgaris (common bean) and P. coccineus (runner bean) cultivars

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