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Maciel, Fábio Luís; Gerald, Lee Tseng Sheng; Echeverrigaray, S.

doi:10.1023/a:1017579014961

Cited by 25 publications

(2 citation statements)

References 20 publications

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“…These studies showed that the majority of market classes among domesticated beans had an ‘S’ type, characteristic of the Mesoamerican gene pool, while other classes showed the ‘T’ type, characteristic of the Andean gene pool. Later on, other studies assessed the genetic diversity of common bean landraces from the Southern region of Brazil with RAPD (Maciel et al 2001) and AFLP markers (Maciel et al 2003). The studies of Maciel et al (2001, 2003) confirmed the overall distinction between Andean and Mesoamerican accessions of domesticated P. vulgaris in Brazilian samples.…”

Section: Introductionmentioning

confidence: 99%

“…Later on, other studies assessed the genetic diversity of common bean landraces from the Southern region of Brazil with RAPD (Maciel et al 2001) and AFLP markers (Maciel et al 2003). The studies of Maciel et al (2001, 2003) confirmed the overall distinction between Andean and Mesoamerican accessions of domesticated P. vulgaris in Brazilian samples. However, the distinction between the two major gene pools was not as clear in the study of Maciel et al (2003), in which some of the landraces showed a ‘T’ phaseolin type but clustered in the Mesoamerican group, suggesting some admixture between these gene pools.…”

Section: Introductionmentioning

confidence: 99%

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Microsatellite diversity and genetic structure among common bean (Phaseolus vulgaris L.) landraces in Brazil, a secondary center of diversity

et al. 2010

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Brazil is the largest producer and consumer of common bean (Phaseolus vulgaris L.), which is the most important source of human dietary protein in that country. This study assessed the genetic diversity and the structure of a sample of 279 geo-referenced common bean landraces from Brazil, using molecular markers. Sixty-seven microsatellite markers spread over the 11 linkage groups of the common bean genome, as well as Phaseolin, PvTFL1y, APA and four SCAR markers were used. As expected, the sample showed lower genetic diversity compared to the diversity in the primary center of diversification. Andean and Mesoamerican gene pools were both present but the latter gene pool was four times more frequent than the former. The two gene pools could be clearly distinguished; limited admixture was observed between these groups. The Mesoamerican group consisted of two sub-populations, with a high level of admixture between them leading to a large proportion of stabilized hybrids not observed in the centers of domestication. Thus, Brazil can be considered a secondary center of diversification of common bean. A high degree of genome-wide multilocus associations even among unlinked loci was observed, confirming the high level of structure in the sample and suggesting that association mapping should be conducted in separate Andean and Mesoamerican Brazilian samples.Electronic supplementary materialThe online version of this article (doi:10.1007/s00122-010-1350-5) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microsatellite diversity and genetic structure among common bean (Phaseolus vulgaris L.) landraces in Brazil, a secondary center of diversity

et al. 2010

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Genetic Diversity among Wild Common Beans from Northwestern Argentina Based on Morpho-agronomic and RAPD Data

Galván

Menéndez-Sevillano

Ron

et al. 2006

Genet Resour Crop Evol

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The genetic diversity among 10 wild populations of common bean Phaseolus vulgaris var. aborigineus was analyzed by means of RAPD markers and morpho-agronomic data. The study was performed on populations collected from different sites located in the provinces of Jujuy, Salta and Tucuma´n in northwestern Argentina. Ten quantitative traits and 33 random primers were scored. Clustering based on morpho-agronomic traits and RAPD markers generated similar phenograms that grouped bean populations based on their site of collection. The levels of diversity observed among populations were low suggesting they have a common ancestor. The levels of diversity shown by morpho-agronomic traits were higher compared to those of molecular markers, most probably due to the effect of the environment. Furthermore, a 480-bp DNA band identified a group of wild populations collected from similar sites. Breeding strategies need to exploit this diversity to broaden the genetic base of commercial beans to develop high yield cultivars.

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Characterization of Some Italian Common Bean (Phaseolus Vulgaris L.) Landraces by RAPD, Semi-random and ISSR Molecular Markers

Marotti

Bonetti

Minelli

et al. 2006

Genet Resour Crop Evol

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Randomly amplified polymorphic DNA (RAPD), inter-simple sequence repeat (ISSR) and a semi-random PCR system were used to analyze the genetic diversity of 16 Italian common bean landraces and their relationship to four commercial cultivars. Of the primers tested, 8 ISSR, 6 RAPD and 7 semi-random primers produced polymorphic and reproducible DNA fragments. A higher proportion of polymorphic bands were observed using ISSR (85%) and semi-random (90%) primers than RAPD (69%) method. The combination of any two semi-random markers allowed the identification of all 20 bean genotypes. In contrast ISSR (except for primer (CAC) 3 GC) and RAPD markers appeared to be less informative as more than two markers were necessary to achieve the same diagnostic level. Moreover, 7 ISSR, 2 RAPD and 8 semi-random exclusive bands were identified as putative population-specific markers. Semi-random and ISSR derived dendrograms showed similar tendencies in terms of genetic relatedness, whereas clustering of genotypes within groups was not similar when compared with the RAPD technique. Despite the different ability to resolve genetic variation among the investigated landraces, two major clusters with less than 60% (ISSR) and 40% (RAPD and semi-random) genetic similarity were formed with all three marker systems. The two groups were correlated with the phaseolin patterns and seed size of the landraces. The analysis showed that the cultivar 'Lingua di Fuoco' and most of the landraces (13 out of 16) collected in Italy belong to the Andean gene pool, whereas only the three populations from Pratomagno belong to the Middle American gene pool.

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Cited by 25 publications

References 20 publications

Microsatellite diversity and genetic structure among common bean (Phaseolus vulgaris L.) landraces in Brazil, a secondary center of diversity

Microsatellite diversity and genetic structure among common bean (Phaseolus vulgaris L.) landraces in Brazil, a secondary center of diversity

Genetic Diversity among Wild Common Beans from Northwestern Argentina Based on Morpho-agronomic and RAPD Data

Characterization of Some Italian Common Bean (Phaseolus Vulgaris L.) Landraces by RAPD, Semi-random and ISSR Molecular Markers

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