Miscellaneous Chromosome Numbers in Opuntieae Dc. (Cactaceae) with a Compilation of Counts for the Group

Majure, Lucas C.; Puente, Raúl; Pinkava, Donald J.

doi:10.2985/026.018.0109

Cited by 31 publications

(30 citation statements)

References 30 publications

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“…The ploidy level of cultivated O. ficus-indica populations is 2n = 88 [11,12]. However, penta, hexa, hepta and diploid levels were also reported in this species, depending on the population origin [9].…”

Section: Introductionmentioning

confidence: 87%

“…Secondly, polyploidy is a usual situation throughout the tribe Opuntieae, which presents some drawbacks in the analysis of codominant markers, such as microsatellites (SSR). Diploids (2n = 2x = 22) are uncommon in this tribe according the reported chromosome counts [9]. Polyploid taxa within Opuntia spp.…”

Section: Introductionmentioning

confidence: 92%

“…range from triploid (2n = 3x = 33) to octoploid (2n = 8x = 88), and many species have multiple ploidy levels [9,10]. The ploidy level of the studied species is unclear, since the information from the literature lacks concordance, particularly in the case of O. dillenii (2n = 12, 22, 26, 36, 40, 44, 66), O. elata (2n = 22, 44) and O. robusta (2n = 22, 44, 66, 88) [9]. The ploidy level of cultivated O. ficus-indica populations is 2n = 88 [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Genetic Diversity in Opuntia spp. Portuguese Populations Using SSR Molecular Markers

2018

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Abstract:The Opuntia spp., most likely few individuals, were introduced in the Iberian Peninsula in the beginning of the 16th century, after the discovery of America, spreading afterwards throughout the Mediterranean basin. We analysed, for the first time, the genetic diversity in a set of 19 Portuguese Opuntia spp. populations from the species O. ficus-indica, O. elata, O. dillenii and O. robusta using nuclear microsatellite (nuSSR) markers. The Italian cultivars 'Bianca', 'Gialla' and 'Rossa' were included in the study for comparison purposes. The nuSSR amplifications produced from five to 16 alleles, with an average of 9.2 alleles per primer pair, and average polymorphism information content of 0.71. The estimated Dice coefficient among populations varied from 0.26 to 1.0, indicating high interspecific genetic diversity but low genetic diversity at the intraspecific level. The hierarchical clustering analysis revealed four major groups that clearly separated the four Opuntia species. Among the O. ficus-indica populations, two sub-clusters were found, one including the white pulp fruits (with cv. Bianca) and the other with the orange pulp ones and including the cv. Gialla, the cv. Rossa, and one pale yellow pulp population. No genetic differences were found between the inermis form, O. ficus-indica f. ficus-indica, and the rewilded spiny one, O. ficus-indica f. amyclaea. The dendrogram indicated that the clustering pattern was unrelated to geographical origin. The results revealed a low level of genetic diversity among the Portuguese populations of O. ficus-indica.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Assessment of Genetic Diversity in Opuntia spp. Portuguese Populations Using SSR Molecular Markers

2018

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“…Segundo Majure et al (2012a) das 164 espécies de Opuntioideae para os quais contagens cromossômi-cas foram realizadas, 26,2% são diploides 13,4% são diploides e poliploides e 60,4% são poliploides. Em trabalhos que investigaram várias espécies, são poucas as que apresentaram registros exclusivamente diploides (PINKAVAet al, 1978;BANDYOPADHYAY & SHARMA, 2000;PIMIENTA-BARRIOS & MUÑOZ-URÍAS, 2001;POWELL & WEEDIN, 2001;SEGURA et al, 2007 (NEGRÓN-ORTIZ, 2007).…”

Section: Poliploidia Em Cactaceaeunclassified

Variação Cromossômica Em Cactáceas

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et al. 2014

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“…The genus Opuntia is known for its multiple taxonomic controversies resulting from wide morphological variability, potentially due to widespread polyploidy, hybridization between closely related species and, in some cases, homoplasy of selected morphological characters ( Majure et al, 2012b ). Among Opuntia species, natural hybrids are common, and hybridization has been regarded as having an impact on evolution ( Pinkava, 2002 ; Reyes-Agüero et al, 2006 ; Majure et al, 2012a ).…”

Section: Introductionmentioning

confidence: 99%

Unraveling Reticulate Evolution in Opuntia (Cactaceae) From Southern Mexico

et al. 2021

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The process of hybridization occurs in approximately 40% of vascular plants, and this exchange of genetic material between non-conspecific individuals occurs unequally among plant lineages, being more frequent in certain groups such as Opuntia (Cactaceae). This genus is known for multiple taxonomic controversies due to widespread polyploidy and probable hybrid origin of several of its species. Southern Mexico species of this genus have been poorly studied despite their great diversity in regions such as the Tehuacán-Cuicatlán Valley which contains around 12% of recognized Mexico’s native Opuntia species. In this work, we focus on testing the hybrid status of two putative hybrids from this region, Opuntia tehuacana and Opuntia pilifera, and estimate if hybridization occurs among sampled southern opuntias using two newly identified nuclear intron markers to construct phylogenetic networks with HyDe and Dsuite and perform invariant analysis under the coalescent model with HyDe and Dsuite. For the test of hybrid origin in O. tehuacana, our results could not recover hybridization as proposed in the literature, but we found introgression into O. tehuacana individuals involving O. decumbens and O. huajuapensis. Regarding O. pilifera, we identified O. decumbens as probable parental species, supported by our analysis, which sustains the previous hybridization hypothesis between Nopalea and Basilares clades. Finally, we suggest new hybridization and introgression cases among southern Mexican species involving O. tehuantepecana and O. depressa as parental species of O. velutina and O. decumbens.

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Miscellaneous Chromosome Numbers in Opuntieae Dc. (Cactaceae) with a Compilation of Counts for the Group

Cited by 31 publications

References 30 publications

Assessment of Genetic Diversity in Opuntia spp. Portuguese Populations Using SSR Molecular Markers

Assessment of Genetic Diversity in Opuntia spp. Portuguese Populations Using SSR Molecular Markers

Variação Cromossômica Em Cactáceas

Unraveling Reticulate Evolution in Opuntia (Cactaceae) From Southern Mexico

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