Limits...
A Homoploid Hybrid Between Wild Vigna Species Found in a Limestone Karst.

Takahashi Y, Iseki K, Kitazawa K, Muto C, Somta P, Irie K, Naito K, Tomooka N - Front Plant Sci (2015)

Bottom Line: Genus Vigna comprise several domesticated species including cowpea and mungbean, and diverse wild species.We found an introgressive hybrid population derived from two wild species, Vigna umbellata and Vigna exilis, in Ratchaburi district, Thailand.We found the hybrid acquired vigorous growth from V. umbellata and drought tolerance plus early flowering from V. exilis, and thus has taken over some habitats of V. exilis in limestone karsts.

View Article: PubMed Central - PubMed

Affiliation: Genetic Resources Center, National Institute of Agrobiological Sciences Tsukuba, Japan.

ABSTRACT
Genus Vigna comprise several domesticated species including cowpea and mungbean, and diverse wild species. We found an introgressive hybrid population derived from two wild species, Vigna umbellata and Vigna exilis, in Ratchaburi district, Thailand. The hybrid was morphologically similar to V. umbellata but habituated in a limestone rock mountain, which is usually dominated by V. exilis. Analyzing simple sequence repeat loci indicated the hybrid has undergone at least one round of backcross by V. umbellata. We found the hybrid acquired vigorous growth from V. umbellata and drought tolerance plus early flowering from V. exilis, and thus has taken over some habitats of V. exilis in limestone karsts. Given the wide crossability of V. umbellata, the hybrid can be a valuable genetic resource to improve drought tolerance of some domesticated species.

No MeSH data available.


Phylogenetic trees based on atpB-rbcL spacer sequences (A), rDNA-ITS (B), and genotypes of SSR loci (C).
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Figure 3: Phylogenetic trees based on atpB-rbcL spacer sequences (A), rDNA-ITS (B), and genotypes of SSR loci (C).

Mentions: According to the genotype data described above, we drew phylogenetic trees based on atpB-rbcL spacer sequences, rDNA-ITS sequences or SSR data. In all the three phylogenetic trees, V. dalzelliana accessions were the most divergent from V. umbellata, V. exilis, and the unidentified accessions (Figure 3). As expected, the unidentified accessions formed a single cluster with V. umbellata in the phylogenetic tree based on the atpB-rbcL spacer region (Figure 3A). In the phylogenetic trees based on nuclear genotypes, however, the unidentified accessions formed an independent cluster in between V. umbellata accessions and V. exilis accessions (Figures 3B,C). The phylogenetic tree based on SSR data indicated the unidentified accessions were closer to the wild accessions of V. umbellata than the cultivated accessions (Figure 3C).


A Homoploid Hybrid Between Wild Vigna Species Found in a Limestone Karst.

Takahashi Y, Iseki K, Kitazawa K, Muto C, Somta P, Irie K, Naito K, Tomooka N - Front Plant Sci (2015)

Phylogenetic trees based on atpB-rbcL spacer sequences (A), rDNA-ITS (B), and genotypes of SSR loci (C).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4664699&req=5

Figure 3: Phylogenetic trees based on atpB-rbcL spacer sequences (A), rDNA-ITS (B), and genotypes of SSR loci (C).
Mentions: According to the genotype data described above, we drew phylogenetic trees based on atpB-rbcL spacer sequences, rDNA-ITS sequences or SSR data. In all the three phylogenetic trees, V. dalzelliana accessions were the most divergent from V. umbellata, V. exilis, and the unidentified accessions (Figure 3). As expected, the unidentified accessions formed a single cluster with V. umbellata in the phylogenetic tree based on the atpB-rbcL spacer region (Figure 3A). In the phylogenetic trees based on nuclear genotypes, however, the unidentified accessions formed an independent cluster in between V. umbellata accessions and V. exilis accessions (Figures 3B,C). The phylogenetic tree based on SSR data indicated the unidentified accessions were closer to the wild accessions of V. umbellata than the cultivated accessions (Figure 3C).

Bottom Line: Genus Vigna comprise several domesticated species including cowpea and mungbean, and diverse wild species.We found an introgressive hybrid population derived from two wild species, Vigna umbellata and Vigna exilis, in Ratchaburi district, Thailand.We found the hybrid acquired vigorous growth from V. umbellata and drought tolerance plus early flowering from V. exilis, and thus has taken over some habitats of V. exilis in limestone karsts.

View Article: PubMed Central - PubMed

Affiliation: Genetic Resources Center, National Institute of Agrobiological Sciences Tsukuba, Japan.

ABSTRACT
Genus Vigna comprise several domesticated species including cowpea and mungbean, and diverse wild species. We found an introgressive hybrid population derived from two wild species, Vigna umbellata and Vigna exilis, in Ratchaburi district, Thailand. The hybrid was morphologically similar to V. umbellata but habituated in a limestone rock mountain, which is usually dominated by V. exilis. Analyzing simple sequence repeat loci indicated the hybrid has undergone at least one round of backcross by V. umbellata. We found the hybrid acquired vigorous growth from V. umbellata and drought tolerance plus early flowering from V. exilis, and thus has taken over some habitats of V. exilis in limestone karsts. Given the wide crossability of V. umbellata, the hybrid can be a valuable genetic resource to improve drought tolerance of some domesticated species.

No MeSH data available.