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Citation for Study 21893

Citation title: "Chromosome numbers, Sudanese wild forms, and classification of the watermelon genus Citrullus, with 50 names allocated to seven biological species".

Study name: "Chromosome numbers, Sudanese wild forms, and classification of the watermelon genus Citrullus, with 50 names allocated to seven biological species".

This study is part of submission 21893 (Status: Published).

Citation

Renner S.S., Sousa A., & Chomicki G. 2017. Chromosome numbers, Sudanese wild forms, and classification of the watermelon genus Citrullus, with 50 names allocated to seven biological species. Taxon, 66(6): 1393-1405.

Authors

• Renner S.S. (submitter) 011-49-(0)89-17861250
• Sousa A.
• Chomicki G.

Abstract

Watermelons are among the most important vegetable crops worldwide, but targeted breeding is hindered by problems with Citrullus taxonomy. Here we clarify nomenclature and species relationships in Citrullus, its chromosome numbers, and the likely geographic region of watermelon domestication. We correct an erroneous chromosome count in recent literature, provide a count for an understudied species, and data on chromosome numbers for the entire genus. We also use a nuclear/plastid locus phylogeny to summarize data on Citrullus sexual systems, loss of tendrils, life history, and geographic ranges. Key insights from new sequences are that (i) material of C. vulgaris var. ?colocynthoides?, collected by Schweinfurth in Egypt in 1882 represents the colocynth, C. colocynthis, and (ii) the citron or bitter watermelon, C. amarus, is indeed a separate species, not a subspecies of the dessert watermelon. Schweinfurth?s varietal name, a nomen nudum, has been widely used for seeds as old as 5400 BP, and it now needs to be investigated whether these seeds are colocynths, watermelon, or a hybrid. To help improve Citrullus taxonomy and nomenclature, we allocate some 50 scientific names to seven biological species, tabulate chromosome counts, and provde with notes misidentified germplasms traceable by accession numbers. More wild-collected herbarium-verified material from Northeast Africa is urgently needed, especially given the discovery of Russian breeders that populations of wild ?cordophanus? from Sudan are closer to the cultivated watermelon than are any other wild populations so far known.

Keywords

chromosome counts; crop plants; herbarium resources; natural geographic ranges; wild relatives

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S21893
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref27860,
  	 author = {Susanne S Renner and Aretuza  Sousa and Guillaume  Chomicki},
  	 title = {Chromosome numbers, Sudanese wild forms, and classification of the watermelon genus Citrullus, with 50 names allocated to seven biological species},
  	 year = {2017},
  	 keywords = {chromosome counts; crop plants; herbarium resources; natural geographic ranges; wild relatives},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Taxon},
  	 volume = {66},
  	 number = {6},
  	 pages = {1393--1405},
  	 abstract = {Watermelons are among the most important vegetable crops worldwide, but targeted breeding is hindered by problems with Citrullus taxonomy. Here we clarify nomenclature and species relationships in Citrullus, its chromosome numbers, and the likely geographic region of watermelon domestication. We correct an erroneous chromosome count in recent literature, provide a count for an understudied species, and data on chromosome numbers for the entire genus. We also use a nuclear/plastid locus phylogeny to summarize data on Citrullus sexual systems, loss of tendrils, life history, and geographic ranges. Key insights from new sequences are that (i) material of C. vulgaris var. ?colocynthoides?, collected by Schweinfurth in Egypt in 1882 represents the colocynth, C. colocynthis, and (ii) the citron or bitter watermelon, C. amarus, is indeed a separate species, not a subspecies of the dessert watermelon. Schweinfurth?s varietal name, a nomen nudum, has been widely used for seeds as old as 5400 BP, and it now needs to be investigated whether these seeds are colocynths, watermelon, or a hybrid. To help improve Citrullus taxonomy and nomenclature, we allocate some 50 scientific names to seven biological species, tabulate chromosome counts, and provde with notes misidentified germplasms traceable by accession numbers. More wild-collected herbarium-verified material from Northeast Africa is urgently needed, especially given the discovery of Russian breeders that populations of wild ?cordophanus? from Sudan are closer to the cultivated watermelon than are any other wild populations so far known. 
  }
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 27860
  AU  - Renner,Susanne S
  AU  - Sousa,Aretuza 
  AU  - Chomicki,Guillaume 
  T1  - Chromosome numbers, Sudanese wild forms, and classification of the watermelon genus Citrullus, with 50 names allocated to seven biological species
  PY  - 2017
  KW  - chromosome counts; crop plants; herbarium resources; natural geographic ranges; wild relatives
  UR  - http://dx.doi.org/
  N2  - Watermelons are among the most important vegetable crops worldwide, but targeted breeding is hindered by problems with Citrullus taxonomy. Here we clarify nomenclature and species relationships in Citrullus, its chromosome numbers, and the likely geographic region of watermelon domestication. We correct an erroneous chromosome count in recent literature, provide a count for an understudied species, and data on chromosome numbers for the entire genus. We also use a nuclear/plastid locus phylogeny to summarize data on Citrullus sexual systems, loss of tendrils, life history, and geographic ranges. Key insights from new sequences are that (i) material of C. vulgaris var. ?colocynthoides?, collected by Schweinfurth in Egypt in 1882 represents the colocynth, C. colocynthis, and (ii) the citron or bitter watermelon, C. amarus, is indeed a separate species, not a subspecies of the dessert watermelon. Schweinfurth?s varietal name, a nomen nudum, has been widely used for seeds as old as 5400 BP, and it now needs to be investigated whether these seeds are colocynths, watermelon, or a hybrid. To help improve Citrullus taxonomy and nomenclature, we allocate some 50 scientific names to seven biological species, tabulate chromosome counts, and provde with notes misidentified germplasms traceable by accession numbers. More wild-collected herbarium-verified material from Northeast Africa is urgently needed, especially given the discovery of Russian breeders that populations of wild ?cordophanus? from Sudan are closer to the cultivated watermelon than are any other wild populations so far known. 
  
  L3  - 
  JF  - Taxon
  VL  - 66
  IS  - 6
  SP  - 1393
  EP  - 1405
  ER  -