Phylogenetic Relationships of the Sweetpotato [Ipomoea batatas (L.) Lam.]

Jarret, Robert L.; Gawel, N. J.; Whittemore, A.

doi:10.21273/jashs.117.4.633

Cited by 61 publications

(34 citation statements)

References 33 publications

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“…php), which was then used for phylogeny estimation using PhyML (Guindon et al 2005) online (http:// atgc.lirmm.fr/phyml/). The HKY substitution model and default transition/transversion ratio (4) and Jones (1974) and Jarret et al (1992) b S-C GRP, Self-compatibility groups, as summarized in Jarret et al (1992); A, self-compatible; B, self-incompatible Euphytica (2011) 177:111-133 115 number of substitution rate categories (4) were used for the analysis. All other models included online were also tested and found to yield the same result.…”

Section: Dna Sequencing and Analysis And Phylogenetic Analysismentioning

confidence: 99%

Wx intron variations support an allohexaploid origin of the sweetpotato [Ipomoea batatas (L.) Lam]

et al. 2010

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To clarify the polyploid origin of the sweetpotato, we analyzed retentions of three distinctive types of Waxy intron 2 (Wx-In2) variants among 27 sweetpotato lines and 24 selected relatives and their phylogenetic relationships with Wx-In2 from 11 closest relatives. The three types of Wx-In2 effectively distinguish three diploid constituent genomes of very close homeology in the sweetpotato: Type I is characteristic of some loci in Genome I and III, and Types II and III are specific to loci in Genome II and III. The Type I Wx-In2 variation was found to be retained in 19 sweetpotato lines, Ipomoea littoralis Blume (49), I. tabascana (49), and I. tenuissima (29); Type II to be retained in all 27 sweetpotato lines, I. littoralis Blume, and two I. trifida accessions; Type III to be retained in 13 sweetpotato lines, I. tenuissima, and four distantly related species. Because of the nature of independent random divergence of orthologous intronic sequences, these highly selective retentions of genome-specific or characteristic sweetpotato Wx-In2 variations among four diploid or tetraploid sweetpotato relatives are consistent only with separate lineages of diploid genomes of the sweetpotato. Such an allohexaploid origin of the sweetpotato probably occurred via hybridization between I. tenuissima and I. littoralis Blume, derived earlier from I. trifida and an unidentified species sibling to I. tenuissima. However, neither the involvement of I. tabascana nor a multiple origin of the sweetpotato can be ruled out. The inference is supported by maximal likelihood relationships between the three types of Wx-In2 from the sweetpotato and Wx-In2 from its 11 closest relatives.

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Section: Dna Sequencing and Analysis And Phylogenetic Analysismentioning

confidence: 99%

Wx intron variations support an allohexaploid origin of the sweetpotato [Ipomoea batatas (L.) Lam]

et al. 2010

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“…Molecular marker (RFLP, RAPD, and SSR) studies confirm the relationship of I. batatas with I. trifida (Jarret et al, 1992;Jarret and Austin, 1994;Buteler et al, 1999). Restriction analysis of chloroplast DNA indicates that I. trifida is probably one of the ancestors of I. batatas (Huang and Sun, 2000).…”

Section: Species Involved and Placementioning

confidence: 72%

Root and Tuber Crops

Bradshaw¹

2010

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“…For example, Williams et al (1990) used the Polymerase Chain Reaction in the characterization of germplasm and to assist in the management of gene banks. Other techniques include Simple Sequence Repeats (Karuri et al 2009), Variation in chloroplast restriction sites (McDonald and Mabry 1992), Random Amplified Polymorphic DNA (Gichuki et al 2003;He et al 2006), Restriction Fragment Length Polymorphism (Jarret et al 1992), DNA Amplification Fingerprinting (Caetano-Annolle's et al 1991), Amplified Fragment Length Polymorphism (He et al 2006;Mcharo and La Bonte 2008;Elameen et al 2008) and Cleavage Amplified Polymorphic Sequence (Tanaka et al 2005). Fajardo et al (2002) used the method of maximally diverse subset (MDS) to identify duplicates in germplasm collections.…”

Section: Research and Developmentmentioning

confidence: 99%