Ploidy level studies on the Dioscorea cayenensis/Dioscorea rotundata complex core set

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Obidiegwu, J (Author) Other; Loureiro, J (Author) Other; Ene Obong, E (Author) Other; Rodriguez, E (Author) Other; Kolesnikova Allen, M (Author) Other; Santos, C (Author) Other; Muoneke, C (Author) Other; Asiedu, R (Author) Other

Journal

Title: Euphytica

Vol. 169

Pages: 319-326

ISSN: 0014-2336

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 11 Citations

Other information

Authenticus ID: P-003-F93

DOI: 10.1007/s10681-009-9960-1

Abstract (EN): The Guinea yams, Dioscorea cayenensis Lam. and D. rotundata Poir. (D. cayenensis-D. rotundata complex), represent a highly important crop, widely distributed in the humid and semi-humid tropics. The ploidy levels of 170 accessions of the core set of Guinea yams from West African countries was determined using flow cytometry with propidium iodide staining. One hundred and eight of the genotypes were found to be tetraploid, 47 were hexaploid and five were octoploid. One mixoploid individual containing tetraploid and hexaploid nuclei was also detected. A deeper analysis considering each separate taxon revealed that while for D. rotundata the majority of individuals were tetraploid, for D. cayenensis this ploidy level was not detected in any of the accessions. Also, no association between ploidy level and place of cultivation was found for the evaluated germplasm. The obtained data is highly valuable for breeding programs of Guinea yam, especially for the optimization of future hybridization experiments directed to the genetic improvement of this economically important crop.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8