The Dioscorea rotundara Diversity Research Set (DrDRS) is a collection of 102 accessions of Guinea yam (D. rotundara) selected by JIRCAS in collaboration with the International Institute of Tropical Agriculture (IITA) and the Iwate Biotechnology Research Center (IBRC) to improve the efficiency of breeding and field evaluation of the crop. This research on DrDRS selection which was published in Crop Science (https://doi.org/10.1002/csc2.20431) was featured as a science news on the website of the Crop Science Society of America (CSSA), and is expected to play a role in future research and breeding of Guinea yam.
The SSR marker, a type of DNA marker was used for the selection of the DrDRS from the 447 accessions of Guinea yam genetic resources maintained at IITA as the original collection. The DrDRS, a smaller set of germplasm collection which maintains the genetic diversity of the original collection, enables researcher to efficiently conduct more detailed research. This study also provided the information of key agricultural traits such as the number of stems per plant, growth period, number of tubers per plant, tuber weight and total yield per plant for all accessions. Now this DrDRS is available for distribution through IITA for further implementation of the research work by various partners.
In the future, together with the whole genome information of Guinea yam (https://www.jircas.go.jp/en/publication/research_results/2017_b02) that has been deciphered, the DrDRS is expected to facilitate the development of excellent varieties that make effective use of the wide range of genetic diversity of this crop.
Click the image to see the article "CATALOGUING GENETIC INFORMATION ABOUT YAM" in the science news of the Crop Science Society of America.
Contributors: MURANAKA Satoru and YAMANAKA Shinsuke