Genetic diversity and differentiation in citron watermelon [ Citrullus lanatus var. citroides ] landraces assessed by simple sequence repeat markers

Mashilo, Jacob; Shimelis, Hussein; Odindo, Alfred; Amelework, Beyene

doi:10.1016/j.scienta.2016.11.015

Cited by 26 publications

(19 citation statements)

References 43 publications

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“…Furthermore, the allele mean described was higher than the results reported by [10], [23] and [30] who found 3.6, 2.8, and 3.9 alleles per locus. However, the average alleles per locus for this study was lower than reported by [31], where 72 alleles were detected with a mean of 7.2 per locus evaluated from 10 SSR markers. According to [32], the application of highly polymorphic markers may lead to a slight overestimation of the diversity.…”

Section: Discussioncontrasting

confidence: 86%

Molecular Characterisation Reveals the Existence of a Hybridogenous Intermediary Form between Sweet Watermelon and Cow Melon Forms of Watermelon

Mujaju¹,

Musango²,

Garkava-Gustavsson³

2018

AJPS

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Watermelon research in Southern Africa, has predominantly observed the clear existence of the sweet watermelon and cow melon forms of watermelon, cultivated on farm and even some occurring in the wild. Molecular characterization of 48 watermelon accessions collected from National Genebank of Zimbabwe using 9 SSR markers generated a total of 49 putative alleles. The average number of alleles detected by each primer was 5.4. Analysis of molecular variance within and among accessions of watermelons revealed that only 39% of the total variation resides between these two groups (cow-melons and sweet watermelons), 24% between accession within groups and 37% within accessions. Multivariate analyses employed provide evidence of the existence of introgression between sweet water melons and cow melons, as reflected by some accessions of cow melons, clustering into a hybridogenous group. Most of watermelon accessions within the hybridogenous group [A (II)] were collected from drier communal areas, while those accessions within the cow melon group [A (I)] are mostly from research centers. The separation of cow melons into distinct groups could be indicative of a possible formation of an isolated evolutionary unit.

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Section: Discussioncontrasting

confidence: 86%

Molecular Characterisation Reveals the Existence of a Hybridogenous Intermediary Form between Sweet Watermelon and Cow Melon Forms of Watermelon

Mujaju¹,

Musango²,

Garkava-Gustavsson³

2018

AJPS

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“…SSR markers have been used in the genetic analysis of many horticultural crops [12,21,[46][47][48]. Though there are a few SSR markers of wax gourd developed from the transcriptome [3], the genetic diversity of wax gourds has been rarely analyzed in previous studies.…”

Section: Discussionmentioning

confidence: 99%

Genome Wide SSR Development and Their Application in Genetic Diversity Analysis in Wax Gourd

Wang

Jiang

et al. 2021

Preprint

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Background: Wax gourd (Benincasa hispida Cong., 2n=2x=24) is one of the most important winter vegetables of the Cucurbitaceae family. There are only limited markers available for this crop and the draft genome of wax gourd provides a powerful tool for SSR marker development.Results: In this study, we developed genome-wide SSR markers from wax gourd genome and characterized their distribution and frequency of different motifs and repeats. A total of 52,431 microsatellites from wax gourd genome were identified, of which 39,319 SSR markers were developed. 1,152 non-wax gourd SSR markers were selected from cucumber, melon, watermelon and pumpkin to test their transferability in wax gourd. 580 SSR markers could be transferable in wax gourd, and 42 of them were detected with polymorphic in 11 tested accessions of wax gourd. In addition, 11 good polymorphic transferrable SSR markers and 21 SSR markers of wax gourd were selected to investigate the genetic diversity and population structure of 129 wax gourd accessions. 112 alleles were detected by these 32 SSR markers. The result of population structure showed that the 129 wax gourd accessions were divided into two main populations, and the genetic diversity analysis separated them into two clusters. Conclusions: The large number of wax gourd SSR markers developed in this study provides a valuable resource for genetic linkage map construction, molecular mapping, and marker-assisted selection (MAS) in wax gourd.

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“…According to the Global Biodiversity Information Facility (GBIF) (https://www.gbif.org/), citron watermelon research and germplasm record include researchers from at least 10 institutions in 13 countries. Currently, despite positive national and international collaborations [88], citron watermelon research is still disconnected with interesting and relevant research programmes running in isolation [4,89]. Partly, this review aims to draw together many disparate aspects of citron watermelon research to facilitate a body knowledge and collaboration by researchers.…”

Section: Synchronization Of Research and Methodsmentioning

confidence: 99%

“…While a large number of landraces are present among subsistence farmers in sub-Saharan Africa, citron watermelon germplasm management is vulnerable to outcrossing and poor documentation and needs commitment to proper maintenance [89]. Therefore, further exploration of the potential for germplasm banking from a wide range of spatial and environmental conditions is a crucial research objective.…”

Section: Systematic Germplasm Banking and Development Of Genetic Resomentioning

confidence: 99%

Citron Watermelon Potential to Improve Crop Diversification and Reduce Negative Impacts of Climate Change

Mandizvo¹,

Odindo²,

Mashilo³

2021

Preprint

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Citron watermelon (Citrullus lanatus var. citroides) is an underexploited and under-researched crop species with potential to contribute to crop diversification in sub-Saharan Africa and beyond. The species is commonly cultivated in the drier parts of Southern Africa, mainly by smallholder farmers who maintain a wide range of landraces. Understanding the molecular and morpho-physiological basis for drought adaptation of Citron watermelon in these dry environments can aid in screening local germplasm, identification of suitable traits for crop improvement and improving food system resilience among smallholder farmers by adding to crop diversification. This paper reviews literature on drought adaptation of C. lanatus spp. (C3 xerophytes), using the systematic review approach. The review discusses; (i) the potential role of citron watermelon in adding to crop diversification, (ii) alternative food uses and potential by-products that can be processed from citron watermelon and (iii) the role of Sub-Saharan farmers as key actors in conserving citron watermelon germplasm and biodiversity. Finally, the review provides a summary of significant findings and identifies critical knowledge gaps for further research.

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Genetic diversity and differentiation in citron watermelon [ Citrullus lanatus var. citroides ] landraces assessed by simple sequence repeat markers

Cited by 26 publications

References 43 publications

Molecular Characterisation Reveals the Existence of a Hybridogenous Intermediary Form between Sweet Watermelon and Cow Melon Forms of Watermelon

Molecular Characterisation Reveals the Existence of a Hybridogenous Intermediary Form between Sweet Watermelon and Cow Melon Forms of Watermelon

Genome Wide SSR Development and Their Application in Genetic Diversity Analysis in Wax Gourd

Citron Watermelon Potential to Improve Crop Diversification and Reduce Negative Impacts of Climate Change

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