Studies of sweet potato and its related species, : I.Comparative investigationson the chromosome numbers and the main plant characters of Ipomoea speclesin section Batatas

Nishiyama, I.; Fujise, Kazuma; Teramura, Tei; Miyazaki, Tsukasa

doi:10.1270/jsbbs1951.11.37

Cited by 15 publications

(2 citation statements)

References 7 publications

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“…All these reports can briefly summarize that I. trifida and its relatives located mainly in the belt zone reaching from the Pacific Ocean to the Gulf of Mexico at about 17 o -20 o N latitude [ 34 ], and the most probable this vast geographical region was one of domestication of sweetpotato. In addition, based on the morphological, cytological and genetical evidence, it is logical to assume that I. trifida was one of direct progenitor of the sweetpotato [ 33 , 35 – 37 ]. In recent years, numerous genetic, phylogenetic and cytogenetic studies have further confirmed the close relationship between I. batatas and I. trifida [ 3 , 7 , 38 ].…”

Section: Discussionmentioning

confidence: 99%

Analysis of evolution and genetic diversity of sweetpotato and its related different polyploidy wild species I. trifida using RAD-seq

Feng

Zhao

et al. 2018

BMC Plant Biol

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BackgroundSweetpotato (Ipomoea batatas (L.) Lam.) is one of the most important crops from the family of Convolvulaceae. It is widely reported that cultivated sweetpotato was originated from Ipomoea trifida. However, diploid, tetraploid and hexaploid I. trifida were found in nature. The relationship, between them, and among them and sweetpotato, is remaining unclear.ResultsIn the present study, we detected the genome diversity and relationship of sweetpotato and different polyploidy types I. trifida using Restriction-site Associated DNA Sequencing (RAD-seq). A total of 38,605 RAD-tags containing 832,204 SNPs had been identified. These tags were annotated using five public databases, about 11,519 tags were aligned to functional genes in various pathways. Based on SNP genotype, phylogenetic relation analysis results confirmed that cultivated sweetpotato has a closer relationship with I. trifida 6× than with I. trifida 4X and I. trifida 2×. Besides, 5042 SSRs were detected in I. trifida 6×, and 3202 pairs of high-quality SSR primers were developed. A total of 68 primers were randomly selected and synthesized, of which 61 were successfully amplified.ConclusionThese results provided new evidence that cultivated sweetpotato originated from I. trifida 6×, and that I. trifida 6× evolved from I. trifida 4X and I. trifida 2×. Therefore, using I. trifida 6× as the model plant of sweetpotato research should be more practical than using I. trifida 2× in the future. Meanwhile, sequence information and markers from the present study will be helpful for sweetpotato and I. trifida studies in the future.Electronic supplementary materialThe online version of this article (10.1186/s12870-018-1399-x) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Analysis of evolution and genetic diversity of sweetpotato and its related different polyploidy wild species I. trifida using RAD-seq

Feng

Zhao

et al. 2018

BMC Plant Biol

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“…I, gracilis R. Br. is an endemic of Australia (Bentham 1869;Austin 1978), yet it is cited in the literature as a tetraploid based on collections from Cuba (Ting et al 1957) and Mexico (Nishiyama et a/. 1961).…”

Section: Introductionmentioning

confidence: 99%

Chromosome numbers of Australian species of Ipomoea L. (Convolvulaceae)

Yen¹,

Gaffey²,

Coates³

1992

Austrobaileya: A Journal of Plant Systematics

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Somatic chromosome counts are reported on 23 species of Ipomoea L, found in Australia. The majority are diploids of the basic number x = 15 (2n = 30), but three exhibit tetraploidy (2n = 60), namely J. plebeia R. Br., I. lonchophylla J. Black and I, racemigera F. Muell. These results are discussed in comparison with the cytology of other Iparnoea species in the world, endemism of Australian species and the possibility of parallel but limited polyploidy as one product of geographically separate evolution in the genus.

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