Potato [Solanum tuberosum] breeding with the use of wild genetic resources
2004
Watanabe, K.N. (Tsukuba Univ., Ibaraki (Japan))
Potato genetic resources have diversity and reside in various regions and climatic zones within the new continent. There are about two hundred species of wild relatives ranging from diploid to hexaploid. These wild species have specific individual genotypes that have high levels of specific disease and pest resistances and abiolic tolerances to harsh conditions such as to freeze and frost compared with the common tetraploid cultivars. Also, cultivated species have variation in appearance such as red, orange or purple pigmented flesh color and these pigmentation could be used as functional food materials. Wild relatives have resistances such to late blight, bacterial wilt, cyst nematodes, root-knot nematodes, viral diseases (PLRV, PVY, PVX etc), potato tuber moth etc. Many accessions of such species have been conserved in international genebanks at CIP, USA and Germany and have been characterized and employed for germplasm enhancement. These collections have systematically evaluated for specific resistance traits and yield components, and they were listed as furnishing the traits that do not exist in the cultivated genepool. Here, the germplasm enhancement scheme using such precious wild genetic resources was introduced and highlighted.
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