The AVRDC - The World Vegetable Center mungbean (Vigna radiata) core and mini core collections.
BACKGROUND
Large ex situ germplasm collections generally harbor a wide range of crop diversity. AVRDC--The World Vegetable Center is holding in trust the world's second largest mungbean (Vigna radiata) germplasm collection with more than 6,700 accessions. Screening large collections for traits of interest is laborious and expensive. To enhance the access of breeders to the diversity of the crop, mungbean core and mini core collections have been established.


RESULTS
The core collection of 1,481 entries has been built by random selection of 20% of the accessions after geographical stratification and subsequent cluster analysis of eight phenotypic descriptors in the whole collection. Summary statistics, especially the low differences of means, equal variance of the traits in both the whole and core collection and the visual inspection of quantile-quantile plots comparing the variation of phenotypic traits present in both collections indicated that the core collection well represented the pattern of diversity of the whole collection. The core collection was genotyped with 20 simple sequence repeat markers and a mini core set of 289 accessions was selected, which depicted the allele and genotype diversity of the core collection.


CONCLUSIONS
The mungbean core and mini core collections plus their phenotypic and genotypic data are available for distribution to breeders. It is expected that these collections will enhance the access to biodiverse mungbean germplasm for breeding.
AVRDC - The World Vegetable Center, P.O. Box 42, Shanhua, Tainan, 74199, Taiwan. roland.schafleitner@worldveg.org.
Roland
R
Schafleitner
AVRDC - The World Vegetable Center South Asia, ICRISAT Campus, Patancheru 502 324, Hyderabad, Telangana, India. ramakrishnan.nair@worldveg.org.
Ramakrishnan Madhavan
RM
Nair
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Telangana, India. a.rathore@cgiar.org.
Abhishek
A
Rathore
AVRDC - The World Vegetable Center, P.O. Box 42, Shanhua, Tainan, 74199, Taiwan. vivian.wang@worldveg.org.
Yen-wei
YW
Wang
AVRDC - The World Vegetable Center, P.O. Box 42, Shanhua, Tainan, 74199, Taiwan. jean.lin@worldveg.org.
Chen-yu
CY
Lin
AVRDC - The World Vegetable Center, P.O. Box 42, Shanhua, Tainan, 74199, Taiwan. julie.chu@worldveg.org.
Shu-hui
SH
Chu
AVRDC - The World Vegetable Center, P.O. Box 42, Shanhua, Tainan, 74199, Taiwan. lucy.lin@worldveg.org.
Pin-yun
PY
Lin
AVRDC - The World Vegetable Center, P.O. Box 42, Shanhua, Tainan, 74199, Taiwan. jan.chang.1975@gmail.com.
Jian-Cheng
JC
Chang
AVRDC - The World Vegetable Center, P.O. Box 42, Shanhua, Tainan, 74199, Taiwan. andreas.ebert@worldveg.org.
Andreas W
AW
Ebert
D001947:Breeding; D016000:Cluster Analysis; D016208:Databases, Factual; D007887:Fabaceae / Q000235:genetics*; D014644:Genetic Variation; D018745:Genome, Plant; D005838:Genotype; D020407:Internet; D018895:Microsatellite Repeats / Q000235:genetics; D010641:Phenotype; D014584:User-Computer Interface