Evolution and Domestication of the Sweet Potato

Nishiyama, Ichizo

doi:10.15281/jplantres1887.84.377

Cited by 52 publications

(33 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sweet potato has a hexaploid genome, and it is postulated that this hexaploid genome is derived from a triploid plant which has been produced by natural crosses between diploid and tetraploid plants (17). Although the sweet potato has been postulated to have an autoploid genome constitution of BBBBBB (17), it could be possible that sporamin A and B subfamilies are at least originally located on different chromosomes carried by different progenitors of the sweet potato.…”

Section: Discussionmentioning

confidence: 99%

“…Although the sweet potato has been postulated to have an autoploid genome constitution of BBBBBB (17), it could be possible that sporamin A and B subfamilies are at least originally located on different chromosomes carried by different progenitors of the sweet potato. Analysis of sporamin multigene families in the wild species of Ipomoea, L leucantha (2 x), I. littoralis (4 x) and L trifida (3 x and 6 x) (17), in addition to the sweet potato cultivars (/. batatas, 6 x), may clarify these points.…”

Section: Discussionmentioning

confidence: 99%

“…These results suggest that the genes coding for sporamin exist as a multigene family in the hexaploid genome of sweet potato, as is the case for many seed storage proteins. Since most of the protainaceous content of sweet potato tuberous roots are accounted for by products of the members of a single multigene family, and wild species of Ipomoea with diploid, triploid, tetraploid or hexaploid genomes postulated to be direct progenitors or predecessors of the sweet potato cultivars (I. batatas) are available (17), the sporamin multigene family offers a good system to study the role of gene multiplicity and polyploidy on the protein productivity of somatic organ storage tissue as well as the structure and evolution of plant multigene families.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural differences in full-length cDNAs for two classes of sporamin, the major soluble protein of sweet potato tuberous roots

1986

View full text Add to dashboard Cite

Sporamin, which accounts for 80% of the total soluble proteins in sweet potato tuberous roots, consists of two polypeptide classes, A and B. The sporamin cDNA clones can also be classified into sporamin A and B subfamilies based on their sequence homologies, with intra-subfamily homologies being much higher than inter-subfamily homologies. The sequence of an essentially full-length cDNA for sporamin B was compared with that for sporamin A. The coding sequences of two cDNAs share 83% sequence homology. The sequences in the 5'- and 3'-noncoding regions show many deletions in addition to base substitutions. The endpoints of deletions longer than 4 bp match precisely to the endpoints of short direct repeats present in the other sequence, which suggests that these deletions are generated by slipped mispairing during DNA replication. In the 5'- and 3'-noncoding region of sporamin B cDNA, there are 5 bp direct repeats with sequences complementary to each other. Since most of these repeats are absent in sporamin A cDNA, these structural features may cause a difference in the secondary structure between A and B mRNAs and affect the translational efficiencies or stabilities of the mRNAs. Precursors for both classes of sporamin carry N-terminal extra-sequences which can be separated into a putative signal peptide segment and a segment enriched with basic amino acids. A two-step processing mechanism for the maturation of sporamin is suggested.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural differences in full-length cDNAs for two classes of sporamin, the major soluble protein of sweet potato tuberous roots

1986

View full text Add to dashboard Cite

show abstract

“…batatas, is known to occur as a number of morphological variants (Nishiyama 1971) and exists as different cytological types, 2n=30 (Nishyama 1971), 2n=60 (Nishiyama 1971), 2n=84 (Kano 1929) and 2n=90 (King and Bamford 1937, Rao 1947, Ting and Keher 1953Sharma and Datta 1958, Nishiyama et al 1961, Jones 1965, Wedderburn 1967, Nishiyama 1971 (Jones 1964, Sharma andDatta 1958) for the former and (Jones 1964, Miege 1962 for the latter species.…”

Section: Ipomoea Lmentioning

confidence: 99%

Cytomorphological Studies in Convolvulaceae

1977

View full text Add to dashboard Cite

“…In Nigerian markets, three varieties are in popular demands: the purple, yellow and white potato. Abundant evidence shows that sweet potatoes are spread widely through the migration roots of people in the new world tropics before the discovery of America [5] [6].…”

Section: Introductionmentioning

confidence: 99%

Varietal Characterisation and Taxonomic Evaluation of Sweet Potato (Ipomoea batatas) Using Macro- and Micromorphological Evidence

Aguoru¹,

Uhia²,

Olasan³

2015

OALib

View full text Add to dashboard Cite

Taxonomic audit was carried out on three varieties of sweet potato (Ipomoea batata) in north central part of Nigeria. Ten (10) tubers of the representative samples of three varieties of sweet potato (Purple, Yellow and White varieties) were collected from different locations within the north central part of Nigeria and planted in the research farm of the University of Agriculture, Makurdi, Nigeria. At full maturity, they were characterized using gross macro-and micromorphological features. Mean values of all quantitative parameters were computed for each variety. Qualitative and quantitative data generated were analysed by using SPSS software 20.0 version. Box plots and charts were constructed to reveal level of variations at a glance. Dendrogram was generated using furthest neighbor method to reveal the phylogenetic relationships among the varieties. Statistical test of significance was performed on major variable characters. From the results, the three varieties varied significantly in their epidermal characters such as stomatal types, stomatal indices and number of epidermal cells. Stomata types were tetracytic, anisocytic, and paracytic in all but the Purple variety had an additional stomatal type (anomocytic). Macroscopically, variation was observed with respect to some qualitative characters (leaf apices, leaf shape, leaf margins, leaf bases, leaf colour, stem colour and root colour) and quantitative characters (leaf sizes, petiole length, stem diameter, root sizes and plant height) at significant levels (p < 0.05). As a result, dendrogram classified the three varieties where the yellow and purple types were widely divergent as two separate species under the Genus Ipomoea. The white type could be seen as a variety of the yellow type based on their close relationship. The synergistic information obtained from both morphological and anatomical sources of evidence in this report has yielded a reliable result that may call for appropriate nomenclatural assignments. Hence, the authors suggest the following nomenclatures: Ipomea batatas var makurdi (Yellow variety); Ipomoea batatas var lafia (White variety) and Ipomoea aguoru (Purple variety).

show abstract

Evolution and Domestication of the Sweet Potato

Cited by 52 publications

References 22 publications

Structural differences in full-length cDNAs for two classes of sporamin, the major soluble protein of sweet potato tuberous roots

Structural differences in full-length cDNAs for two classes of sporamin, the major soluble protein of sweet potato tuberous roots

Cytomorphological Studies in Convolvulaceae

Varietal Characterisation and Taxonomic Evaluation of Sweet Potato (Ipomoea batatas) Using Macro- and Micromorphological Evidence

Contact Info

Product

Resources

About