Structure and Genetic Diversity of Wild Populations of Lima Bean (Phaseolus lunatus L.) from the Yucatan Peninsula, Mexico

Crop Science ◽  
2006 ◽  
Vol 46 (3) ◽  
pp. 1071-1080 ◽  
Author(s):  
Jaime Martínez-Castillo ◽  
Daniel Zizumbo-Villarreal ◽  
Paul Gepts ◽  
Patricia Delgado-Valerio ◽  
Patricia Colunga-GarcíaMarín
Keyword(s):  
Genetic Diversity ◽  
Yucatan Peninsula ◽  
Lima Bean ◽  
Phaseolus Lunatus ◽  
Wild Populations ◽  
Yucatán Peninsula

scholarly journals Differentiation and genetic diversity of Phaseolus lunatus wild populations from Chiapas, Mexico, and their genetic relationships with MI and MII groups

2016 ◽  
Vol 94 (4) ◽  
pp. 712
Author(s):  
Pedro Jesús Ruiz-Gil ◽  
Gabriel Chepe-Cruz ◽  
Rubén Humberto Andueza-Noh ◽  
Matilde Margarita Ortiz-García ◽  
Jaime Martínez-Castillo
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Genetic Divergence ◽  
Genetic Relationships ◽  
Lima Bean ◽  
Phaseolus Lunatus ◽  
Gene Pools ◽  
Wild Populations ◽  
Isthmus Of Tehuantepec ◽  
High Level

<p><strong>Background</strong><em>. </em>Understanding the genetic structure of wild relatives of domesticated species is crucial for its conservation and to elucidate the sites of crop domestication. Lima bean is one of the five domesticated <em>Phaseolus</em> species and Mexico is one of its centers of domestication. Recent studies showed the existence of two wild gene pools (MI and MII) of this species in Mexico and suggested that their genetic divergence occurred in southeast Mexico.</p><p><strong>Question</strong><em>. </em>Did MI and MII groups diverged around the Isthmus of Tehuantepec, Mexico?</p><p><strong>Studied species</strong><em>. </em>Lima bean: Neotropical plant species, herbaceous, with an annual/short life cycle and with autogamous tendency.</p><p><strong>Study site and years of study</strong><em>. </em>Seven wild populations were collected in 2012 in the State of Chiapas, México, area underrepresented in previous studies.</p><p><strong>Methods</strong><em>. </em>Genetic diversity and grouping patterns of collected populations and their relationship to MI and MII groups were analyzed at eight microsatellite loci.</p><p><strong>Results</strong>. High genetic structure (<em>F</em><sub>ST</sub>: 0.42 to 0.96) and a high level of genetic diversity (<em>H</em><sub>E </sub>= 0.48) were found. The analyses, and presence of admixed populations in MI and MII, suggested that the genetic divergence of these groups is an ongoing process centered around the Isthmus of Tehuantepec.</p><p><strong>Conclusions</strong><em>. </em>Our results support the hypothesis that MI and MII groups diverged around the Isthmus of Tehuantepec; however, sampling should be increased both at population and genomic levels, to determine the precise organization of the genetic diversity of wild <em>P. lunatus</em> from Mexico.</p>

Genetic diversity in accessions of lima bean (Phaseolus lunatus L.) determined from agro-morphological descriptors and SSR markers for use in breeding programs in Brazil

2021 ◽  
Author(s):  
Carolline de Jesús Pires ◽  
Marcones Ferreira Costa ◽  
Maria Imaculada Zucchi ◽  
Regina Lucia Ferreira-Gomes ◽  
José Baldin Pinheiro ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Ssr Markers ◽  
Lima Bean ◽  
Phaseolus Lunatus ◽  
Morphological Descriptors ◽  
Breeding Programs

scholarly journals Structure and Genetic Diversity of Nine Important Landraces of Capsicum Species Cultivated in the Yucatan Peninsula, Mexico

Agronomy ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 376 ◽  
Author(s):  
Lucero del C. López Castilla ◽  
René Garruña Hernández ◽  
Crescencio de la Cruz Castillo Aguilar ◽  
Aida Martínez-Hernández ◽  
Matilde Margarita Ortiz-García ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Relationships ◽  
Yucatan Peninsula ◽  
Conservation Status ◽  
Sustainable Use ◽  
Issr Markers ◽  
Southern Mexico ◽  
Yucatán Peninsula ◽  
Capsicum Spp ◽  
Capsicum Species

Mexico has a wealth of Capsicum species, which has led to the development of a large number of chili pepper landraces. A great wealth of Capsicum germplasm can be found in southern Mexico in the Yucatan Peninsula, an important area of diversification of Capsicum annuum. Specifically, in the western Yucatan Peninsula, three of the five domesticated species of Capsicum (C. annuum, C. chinense and C. frutescens) have been reported. However, information on their genetic diversity, conservation status and potential use is lacking. To generate useful information toward the sustainable use, management and conservation of these species, we evaluated the structure, diversity and genetic relationships of nine accessions of Capsicum spp., of major importance cultivated in the western Yucatan Peninsula using 42 ISSR loci. The results indicated that these accessions consisted of three genetic groups that were defined by the respective species of each accession. The level of genetic diversity was moderate and distributed mainly among accessions. The ISSR markers detected a high level of polymorphism and allowed the genetic differentiation of the C. annuum complex. The results indicated that the accessions collected in the western Yucatan Peninsula constitute a valuable genetic resource that can be used in genetic improvement and conservation programs.

Estimation of natural outcrossing rate and genetic diversity in Lima bean (Phaseolus lunatus L. var. lunatus) from Brazil using SSR markers: implications for conservation and breeding

2016 ◽  
Vol 64 (6) ◽  
pp. 1355-1364 ◽  
Author(s):  
J. S. Penha ◽  
A. C. A. Lopes ◽  
R. L. F. Gomes ◽  
J. B. Pinheiro ◽  
J. R. Assunção Filho ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Ssr Markers ◽  
Lima Bean ◽  
Outcrossing Rate ◽  
Phaseolus Lunatus

scholarly journals Genetic diversity analysis of Lima bean (Phaseolus lunatus L.) Landrace from Ethiopia as reveled by ISSR marker

2021 ◽  
Vol 44 (1) ◽  
pp. 81-90
Author(s):  
Leyila Nasir Leyila Nasir ◽  
Tileye Feyissa ◽  
Zemede Asfaw
Keyword(s):  
Genetic Diversity ◽  
Sustainable Use ◽  
Lima Bean ◽  
Issr Markers ◽  
Phaseolus Lunatus ◽  
Considerable Proportion ◽  
Improvement Strategy ◽  
Neglected Crops ◽  
Total Genetic Diversity ◽  
Planting Materials

Lima bean (Phaseolus lunatus L.) is one of the five most important legume crops from the genus Phaseolus though it is one of the neglected crops in Ethiopia. There is no national breeding program for its improvement. As it is true for all crops, understanding the genetic diversity of Lima bean is useful for its improvement and sustainable use. Therefore, the objective of the current study was to investigate genetic diversity of Lima bean landrace collected in Ethiopia using eight issr markers. A total of 96 landrace were collected from five administrative zones of Ethiopia from which 106 clear bands were detected. About 95 (88.7%) of the bands were polymorphic. The genetic diversity analyses result revealed that landrace collected from West Wellega showed the highest (0.1864) genetic diversity. amova demonstrated highly significant (P=0.00) genetic diversity among and within populations. A considerable proportion (66%) of the total genetic diversity was distributed among populations and 34% within populations. In addition, the calculated Fst value was high (Fst = 0.66), associated with a low gene flow value (Nm=0.27) indicating lower differentiation of the populations, which, in turn, implied no significant exchange of planting materials among farmers in the studied populations and the nature of the crops that Lima bean is 52% self pollinated crop. upgma, structure and PCoA analysis showed very strong grouping among individuals collected from the same zones and geographically distinct zones. Overall, genetic diversity achieved from this study could be used as pioneer information about the existing genetic resource for future Lima bean conservation and improvement strategy in Ethiopia.

scholarly journals Genetic diversity and promising crosses indication in lima bean (Phaseolus lunatus) accessions

2015 ◽  
Vol 36 (2) ◽  
pp. 683
Author(s):  
Verônica Brito da Silva ◽  
Regina Lucia Ferreira Gomes ◽  
Ângela Celis De Almeida Lopes ◽  
Carlos Tadeu Dos Santos Dias ◽  
Raimundo Nonato Oliveira Silva
Keyword(s):  
Genetic Diversity ◽  
Lima Bean ◽  
Phaseolus Lunatus

Wild to crop introgression and genetic diversity in Lima bean (Phaseolus lunatus L.) in traditional Mayan milpas from Mexico

2014 ◽  
Vol 15 (6) ◽  
pp. 1315-1328 ◽  
Author(s):  
Dzul-Tejero Félix ◽  
Julián Coello-Coello ◽  
Jaime Martínez-Castillo
Keyword(s):  
Genetic Diversity ◽  
Lima Bean ◽  
Phaseolus Lunatus

scholarly journals Effect of Climatic Conditions and Land Cover on Genetic Structure and Diversity of Eunica tatila (Lepidoptera) in the Yucatan Peninsula, Mexico

Diversity ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 79 ◽  
Author(s):  
Laura Cavanzón-Medrano ◽  
Salima Machkour-M’Rabet ◽  
Landy Chablé-Iuit ◽  
Carmen Pozo ◽  
Yann Hénaut ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Tropical Forest ◽  
Yucatan Peninsula ◽  
Climatic Conditions ◽  
Habitat Characteristics ◽  
Fragmented Landscape ◽  
Model Species ◽  
Yucatán Peninsula ◽  
The Impact

Fragmentation is the third cause of the biodiversity declination. Population genetic studies using Lepidoptera as the model species in the context of loss of habitat are scarce, particularly for tropical areas. We chose a widespread butterfly from Mexico as the model species to explore how changes of habitat characteristics (undisturbed forest, anthropogenic disturbances, and coastal areas), and climatic conditions affect genetic diversity and population structure. The Nymphalidae Eunica tatila is a common species in the Yucatan Peninsula considered to be a bio-indicator of undisturbed tropical forest, with migratory potential and a possible sex-biased dispersal. We genotyped 323 individuals collected in eight undisturbed areas, using four Inter Simple Sequence Repeats primers. Results show a high genetic diversity and no population structure. Temperature and shrub density present a positive and significant relationship with polymorphism values. Furthermore, our results show the positive effect of surrounding forest habitat on genetic diversity, confirming that E. tatila is a bio-indicator of undisturbed tropical forest. We found evidence of sex-biased dispersal. This paper represents one of the few studies on population genetics of tropical butterfly in a fragmented landscape and is, therefore, an important step in understanding the impact of habitat fragmentation on the risk of a butterflies’ decline.

scholarly journals Behavior of the Hottest Chili Peppers in the World Cultivated in Yucatan, Mexico

HortScience ◽  
2018 ◽  
Vol 53 (12) ◽  
pp. 1772-1775 ◽  
Author(s):  
Liliana S. Muñoz-Ramírez ◽  
Laura P. Peña-Yam ◽  
Susana A. Avilés-Viñas ◽  
Adriana Canto-Flick ◽  
Adolfo A. Guzmán-Antonio ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Yucatan Peninsula ◽  
The Other ◽  
Capsicum Chinense ◽  
Heat Units ◽  
Yucatán Peninsula ◽  
The World ◽  
Chili Peppers ◽  
Bhut Jolokia

The Yucatan Peninsula is recognized as the center of genetic diversity of Habanero peppers (Capsicum chinense Jacq.), which can be distinguished from those cultivated in other regions of the world by their aroma, taste, and—most of all—by their pungency. We evaluated three commercial varieties of chili peppers reported as being the hottest in the world: ‘Bhut Jolokia’, ‘Trinidad Moruga Scorpion’, and ‘Carolina Reaper’. The aim of our study was to determine the behavior of the pungency when cultivated under the edaphoclimatic conditions of Yucatan. Our results show that the three varieties registered greater contents in comparison with those reported in other regions of the world. ‘Carolina Reaper’—considered to be the hottest variety in the world, with a pungency of 2,200,000 Scoville heat units (SHU)—when cultivated in Yucatan, had a pungency of 3,006,330 SHU, which was greater than all the other varieties analyzed.

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