Genetic Resources of Pumpkins and Squash, Cucurbita spp.

Paris, Harry S.

doi:10.1007/7397_2016_3

Cited by 37 publications

(40 citation statements)

References 162 publications

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“…Cucurbita pepo , C . maxima , and C. moschata are considered major crops of worldwide economic importance, as they are cultivated globally (Paris, ; Chomicki et al., ). For 2017 alone, the world production of pumpkins, squashes, and gourds was 28 million tons on 2 million ha.…”

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confidence: 99%

“…Cucurbita moschata is considered the second most diverse species of the genus after C. pepo (Ferriol and Pico, ; Gong et al., ; Paris, ). It exhibits remarkable morphological diversity in its fruit and seed types (e.g., shape, color, size; Figs.…”

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confidence: 99%

“…Domestication usually involves local adaptation, as human populations locally select attributes related to morphological and physiological differentiation, enabling ecological adaptation to local climatic and soil conditions (Casas et al, 2007;Paris, 2016). These processes result in genetically structured subgroups of the domesticated species.…”

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confidence: 99%

“…The genus Cucurbita (Cucurbitaceae) is native to the Americas and includes 15 to 20 taxa (species and subspecies), five of which are domesticated (Lira, 1995; Organization for Economic Cooperation and Development [OECD], 2012;Paris, 2016;Kates et al, 2017;Castellanos-Morales et al, 2018;Eguiarte et al, 2018). Cultivated species comprise a large diversity of fruit shapes, including numerous landraces or varieties, as a result of their wide adaptability and popularity all over the world (OECD, 2012;Castellanos-Morales et al, 2018;Eguiarte et al, 2018).…”

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confidence: 99%

“…Cultivated species comprise a large diversity of fruit shapes, including numerous landraces or varieties, as a result of their wide adaptability and popularity all over the world (OECD, 2012;Castellanos-Morales et al, 2018;Eguiarte et al, 2018). Cucurbita pepo, C. maxima, and C. moschata are considered major crops of worldwide economic importance, as they are cultivated globally (Paris, 2016;Chomicki et al, 2019). For 2017 alone, the world production of pumpkins, squashes, and gourds was 28 million tons on 2 million ha.…”

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confidence: 99%

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Phylogeographic and population genetic analyses ofCucurbita moschatareveal divergence of two mitochondrial lineages linked to an elevational gradient

Hernández-Rosales

Castellanos‐Morales

Vega

et al. 2020

American J of Botany

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Premise Domestication usually involves local adaptation to environmental conditions. Cucurbita species are a promising model for studying these processes. Cucurbita moschata is the third major crop in the genus because of its economic value and because it displays high landrace diversity, but research about its genetic diversity, population structure, and phylogeography is limited. We aimed at understanding how geography and elevation shape the distribution of genetic diversity in C. moschata landraces in Mexico. Methods We sampled fruits from 24 localities throughout Mexico. We assessed 11 nuclear microsatellite loci, one mtDNA region, and three cpDNA regions but found no variation in cpDNA. We explored genetic structure with cluster analysis, and phylogeographic relationships with haplotype network analysis. Results Mitochondrial genetic diversity was high, and nuclear genetic differentiation among localities was intermediate compared to other domesticated Cucurbita. We found high levels of inbreeding. We recovered two mitochondrial lineages: highland (associated with the Trans‐Mexican Volcanic Belt) and lowland. Nuclear microsatellites show that localities from the Yucatan Peninsula constitute a well‐differentiated group. Conclusions Mexico is an area of high diversity for C. moschata, and these landraces represent important plant genetic resources. In Mexico this species is characterized by divergence processes linked to an elevational gradient, which could be related to adaptation and may be of value for applications in agriculture. The Isthmus of Tehuantepec may be a partial barrier to gene flow. Morphological variation, agricultural management, and cultural differences may be related to this pattern of genetic structure, but further studies are needed.

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Phylogeographic and population genetic analyses ofCucurbita moschatareveal divergence of two mitochondrial lineages linked to an elevational gradient

Hernández-Rosales

Castellanos‐Morales

Vega

et al. 2020

American J of Botany

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Influence of plant domestication on plant‐pollinator interactions: Floral attributes and floral visitor communities in wild and cultivated squash plants

Glasser

Santiago‐Hernández

Delgado-Carrillo

et al. 2023

American J of Botany

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Premise: Domestication of plant species results in phenotypic modifications and changes in biotic interactions. Most studies have compared antagonistic plantherbivore interactions of domesticated plants and their wild relatives, but little attention has been given to how domestication influences plant-pollinator interactions. Floral attributes and interactions of floral visitors were compared between sister taxa of the genus Cucurbita (Cucurbitaceae), the domesticated C. moschata, C. argyrosperma ssp. argyrosperma and its wild progenitor C. argyrosperma ssp. sororia in the place of origin. Methods: We conducted univariate and multivariate analyses to compare floral morphological traits and analyzed floral reward (nectar and pollen) quantity and quality between flowers of wild and domesticated Cucurbita taxa. Staminate and pistillate flowers of all three taxa were video recorded, and visitation and behavior of floral visitors were registered and analyzed. Results: Most floral morphological characteristics of flowers of domesticated taxa were larger in both staminate and pistillate flowers. Staminate and pistillate flowers presented distinct correlations between floral traits and integration indices between domesticated and wild species. Additionally, pollen quantity and protein to lipid ratio were greater in domesticated species. Cucurbit pollen specialists, Eucera spp., had the highest probability of visit for all Cucurbita taxa. Conclusions: We provide evidence that floral traits of domesticated and wild Cucurbita species experienced different selection pressures. Domesticated Cucurbita species may have more resources invested towards floral traits, thereby increasing attractiveness to pollinators and potentially plant reproductive success. Wild ancestor plant populations should be conserved in their centers of origin to preserve plantpollinator interactions.

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Large genomic introgression blocks of Phaseolus parvifolius Freytag bean into the common bean enhance the crossability between tepary and common beans

et al. 2022

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The production of the common bean ( Phaseolus vulgaris L.), one of the most important sources of protein and minerals and one of the most consumed grain legumes globally, is highly affected by heat and drought constraints. In contrast, the tepary bean ( Phaseolus acutifolius A. Gray), a common bean‐related species, is adapted to hot and dry climates. Hybridization to introduce complex traits from the tepary bean into the common bean has been challenging, as embryo rescue is required. In this study, we report three novel interspecific lines that were obtained by crossing lines from prior common bean × tepary bean hybridization with Phaseolus parvifolius Freytag in order to increase the male gametic diversity to facilitate interspecific crosses. These interspecific lines enhanced the crossability of the common bean and tepary bean species while avoiding the embryo rescue process. Crossing these three interspecific lines with tepary beans resulted in 12‐fold more hybrid plants than crossing traditional common beans with tepary beans. Whole‐genome sequencing analysis of these three interspecific lines shows large introgressions of genomic regions corresponding to P. parvifolius on chromosomes that presumably contribute to reproductive barriers between both species. The development of these lines opens up the possibility of increasing the introgression of desirable tepary bean traits into the common bean to address constraints driven by climate change.

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Genetic Resources of Pumpkins and Squash, Cucurbita spp.

Cited by 37 publications

References 162 publications

Phylogeographic and population genetic analyses ofCucurbita moschatareveal divergence of two mitochondrial lineages linked to an elevational gradient

Phylogeographic and population genetic analyses ofCucurbita moschatareveal divergence of two mitochondrial lineages linked to an elevational gradient

Influence of plant domestication on plant‐pollinator interactions: Floral attributes and floral visitor communities in wild and cultivated squash plants

Large genomic introgression blocks of Phaseolus parvifolius Freytag bean into the common bean enhance the crossability between tepary and common beans

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