Marker design in a polyploid crop, yams

One of the major challenges in yams is their polyploid nature, and lack of information available on the genetics and cytogenetics of this crop. Although the basic chromosome number has now been established as X=20 (earlier it was X = 10), and there are the existence of diploids, triploids, tetraploids and higher ploidy levels however, it is still not understood if it is allo- or auto-polyploid. IITA has joined hands with the initiative by EiB through Bioinformatics Module on 'Developing tools (genotyping/bioinformatic/statistical) for polyploid crops' and has been part of all the workshops and virtual meetings held so far. The yam team has also started teaming up with EiB Genotyping Module to develop QC markers for routine screening of breeding materials in yams. The development of QC panel is very important in yam to check the fidelity of crosses made in the breeding programs at IITA and NARS. The impact of this ongoing project is huge in yam improvement as the community will be able to make use of the HTPG platform for routine QC genotyping; liaise with experts across the globe through EiB Bioinformatics Module work on polyploid crops; share experiences and gather knowledge; get backstopping support; raise the profile of the crop from being orphan in terms of understanding the genetics and genomics of this crop; use genotyping tools routinely; and bring NARS partners on board to get support from EiB initiatives.