Re-defining the yam (Dioscorea spp.) core collection using morphological traits

Development of core collection representing the diversity in the entire germplasm creates a better access and enhanced utilization of the main collection thus allowing rapid evaluation in crop improvement programs. Core collections are dynamic in nature and needs revisiting when additional germplasm...

Full description

Saved in:
Bibliographic Details
Published in:Plant genetic resources: characterization and utilization 2018-06, Vol.16 (3), p.193-200
Main Authors: Girma, Gezahegn, Bhattacharjee, Ranjana, Lopez-Montes, Antonio, Gueye, Badara, Ofodile, Sam, Franco, Jorge, Abberton, Michael
Format: Article
Language:English
Subjects:
Climate change
Collection
Collections
Crop improvement
Crops
Dioscorea
Dioscorea alata
Germplasm
Morphology
Multivariate analysis
Principal components analysis
Software
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Development of core collection representing the diversity in the entire germplasm creates a better access and enhanced utilization of the main collection thus allowing rapid evaluation in crop improvement programs. Core collections are dynamic in nature and needs revisiting when additional germplasm and information becomes available. In the current study, an attempt was made to re-define the previously developed yam (Dioscorea spp) core collection using 56 morphological traits. Information on additional acquired germplasm and presence of duplicates or mislabelled accessions in the entire collection was also used. The re-defined core collection consisted of 843 accessions and represented about 20% of the entire collection. It included six Dioscorea species, of which accessions of Dioscorea rotundata are in the majority (73.54%) followed by Dioscorea alata (21.35%), Dioscorea bulbifera (1.66%), Dioscorea cayenensis (1.42%), Dioscorea dumetorum (1.42%) and Dioscorea esculenta (0.59%). The Shannon weaver diversity index and principal component analysis revealed the maximum diversity captured in the core from the base collection. This re-defined core collection is more valuable than the original core since it represents true-to-type accessions ensuring reliability for enhanced utilization of germplasm in yam improvement programs.
ISSN:1479-2621
1479-263X
DOI:10.1017/S1479262117000144