Diversity and genetic structure among subpopulations of Gossypium mustelinum (Malvaceae)

Alves, Milena Ferreira; Barroso, Paulo Augusto Vianna; Ciampi, A. Y.; Hoffmann, Lúcia Vieira; Azevedo, Vânia Cristina Rennó; Cavalcante, Uided Maaze Tiburcio

doi:10.4238/2013.february.27.9

Cited by 20 publications

(14 citation statements)

References 23 publications

(26 reference statements)

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“…Population genetics studies examining tree species have shown that trees are generally allogamous, but with positive inbreeding coefficients (Azevedo et al, 2007;Santos et al, 2011;Alves et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Diversity and genetic structure of mangaba remnants in states of northeastern Brazil

et al. 2015

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ABSTRACT. In this study, we analyzed the genetic diversity and structure of remnants of mangaba populations in states of northeastern Brazil by applying 9 microsatellite markers previously developed to establish conservation strategies for germplasm and species preservation. Six to 20 individuals per population were analyzed, with a total of 94 individuals and 6 populations from the states of Ceará, Pernambuco, and Sergipe, Brazil. The intra-population positive fixation index (f) in all populations indicated inbreeding resulting from the lack of random mating. The mean genetic diversity index values G ST , F ST , and R ST estimated for divergence among the 6 populations were 0.14 (P < 0.05), revealing moderate genetic differentiation. The smallest F ST value (P ≥ 0.05) was observed between the Jacarecoara and Tapera populations (0.005) and the highest between the Barra dos Coqueiros and Jacarecoara populations (0.287). The Jacarecoara population was the most divergent among the populations analyzed. According to analysis of molecular variance results, the largest variation percentage resulted from variability within populations (83.18%). Bayesian clustering analysis showed the formation of 2 sets (K = 2). Our results are important for developing strategies for in situ conservation of the species, seed collection, and ex situ conservation. For both methods, conservation of the greatest possible genetic variability of the species is essential.

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Section: Resultsmentioning

confidence: 99%

Diversity and genetic structure of mangaba remnants in states of northeastern Brazil

et al. 2015

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“…The high endogamy values (f) observed both in the overall collection as within states and multilocus F ST value show a tendency to form families progressively homozygous. Similar structures of high diversity threatened by low genetic recombination are of the others allotetraploid cottons in Brazil: G. barbadense (Almeida et al, 2009), and G. mustelinum Alves et al, 2013;Menezes et al, 2014). The limited gene flow is explained by geographical distribution of the plants, since just one to a few individuals may be find together.…”

Section: Discussionmentioning

confidence: 83%

Research Article Genetic diversity of arboreal cotton populations of the Brazilian semiarid: a remnant primary gene pool for cotton cultivars.

et al. 2017

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ABSTRACT. Mocó cotton belong to the same species as the cultivated species, Gossypium hirsutum, and cultivated forms were mainly landraces but also developed as cultivars, bearing good fiber quality and drought tolerant when cropped as a perennial species. The northeast Brazil crop system based on this cotton type is finished, with a few small area planted in the three main States, where it was previously cultivated (Ceará, Paraíba, and Rio Grande do Norte), but in others, maintenance is accomplished by single dooryard plants. Plants were found in all visited Northeast Brazil municipalities, sometimes in the North of the country, and were collected for ex situ preservation and evaluation. Most of seeds had no fuzz (62.2%) and 94.6% of the genotypes presented spot in flowers. Seventy-one alleles were revealed in 12 loci. The genetic structure of the population evaluated by microsatellite markers shows two main groups, one comprising the Seridó region where landraces were originated and other comprising 2 I.P.P. de Menezes et al. Genetics and Molecular Research 16 (3): gmr16039659 the state of Ceará, where a specific breeding program was developed. Genotypes collected in North Brazil States as well as those collected in Bahia, Alagoas, and Sergipe grouped with those collected in Ceará. The Mantel correlogram indicates a significant (P < 0.05) correlation between genetic and geographical distances up to 77 km. The ex situ maintenance and agronomical evaluation are the main concerns for mocó, as the use of the agricultural interesting traits, possibly introgressed to other genotypes, is predicted. The in situ preservation is still of interest since there is more diversity there than in the collected plants and some should be continued due to use as medicinal plant.

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“…The species mainly inhabits areas with longer water availability within the semiarid region in which it occurs, such as the banks of rivers and ponds. However, anthropogenic factors cause damage to the population, particularly the clearing of riparian vegetation which is usually associated with use as a pasture for cattle and goats (Alves et al, 2013). In addition, the commercial cultivation of cotton in close proximity to natural populations can introduce new problems.…”

Section: Discussionmentioning

confidence: 99%

“…There are small foci of coexistence with cultivated cotton. They result from maintenance of plants in backyards and from propagule dispersal between producing and consuming regions, with no observed impact on wild populations (Alves et al, 2013). This is an indication that impacts may depend on broader sympatry, where a greater number of cultivated individuals are within the vicinity.…”

Section: Introductionmentioning

confidence: 95%

Susceptibility of Gossypium mustelinum Populations to the Main Cotton Diseases in Brazil

Menezes¹,

Gaiotto²,

Suassuna³

et al. 2014

JAS

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The present study was conducted in five Gossypium mustelinum populations that were phenotyped and genotyped to quantify their resistance to the major diseases that affect cultivated cotton (G. hirsutum) in Brazil. Four G. mustelinum populations, in addition to genotypes of G. hirsutum and G. barbadense (resistant or susceptible controls), were phenotyped for resistance to cotton blue disease, angular leaf spot, common mosaic and ramulose. Artificial inoculation of cotton plants with causative agents of cotton blue disease, angular leaf spot and ramulose, as well as those naturally infested with common mosaic virus, showed that all G. mustelinum accessions were susceptible to every disease studied. Four microsatellite markers linked to disease resistance genes for cotton blue disease, angular leaf spot and root-knot nematodes (Meloidogyne spp.) in G. hirsutum were used for genotyping of the five populations. The markers amplified different alleles from those associated with resistance genes in cultivated cotton, revealing polymorphisms different from reported cases of G. hirsutum resistance. The susceptibility to all diseases studied may represent a phytosanitary risk for the in situ conservation of natural G. mustelinum populations.

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Diversity and genetic structure among subpopulations of Gossypium mustelinum (Malvaceae)

Cited by 20 publications

References 23 publications

Diversity and genetic structure of mangaba remnants in states of northeastern Brazil

Diversity and genetic structure of mangaba remnants in states of northeastern Brazil

Research Article Genetic diversity of arboreal cotton populations of the Brazilian semiarid: a remnant primary gene pool for cotton cultivars.

Susceptibility of Gossypium mustelinum Populations to the Main Cotton Diseases in Brazil

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