Evaluation of Late Blight Resistance and Agronomic Characteristics of Short-day Adapted Potato Germplasm
2011
Park, Y.E., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Cho, H.M., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Cho, J.H., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Cho, K.S., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Kim, H.J., Highland Agriculture Research Center, NICS, RDA, Pyeongchang, Republic of Korea | Juan, Landeo, International Potato Center, Lima, Peru
Potato late blight caused by the fungus Phytophthora infestans is one of the most vital diseases damaging the potato plant. It is for this reason that breeding potato cultivars resistant to late blight is now becoming a major concern around the world. The B3C1 clones has been introduced by the Highland Agriculture Research Center, RDA. The clones which came from International Potato Center in 2005 have a durable resistance to late blight. The clones were bred under a short-day condition in Peru. However, there was still no report on the adaptability of these clones to the long-day condition in Korea. Therefore, this study was conducted to evaluate the late blight resistance and major agronomic characteristics of B3C1 clones under Korea's long-day condition. This study was also done to generate genetic resources for developing new varieties resistant to late blight. In this study it was found out that in naturally infested field with P. infestans, AUDPC (area under disease progress curve) values of all B3C1 clones were significantly lower than those of the control varieties, 'Superior', 'Atlantic', and 'Haryeong'. It was found out that B3C1 clones had a high level of resistance to late blight and that they could be used as genetic resources to breed potato varieties with late blight resistance. However, several undesirable characteristics such as extremely late maturity, excessive growth of stems and stolons, and production of tubers that cannot easily be removed from the stolons were also observed. Among the twenty B3C1 clones, two clones, LB-8 (CIP393077.159) and LB-11 (CIP393371.159), were selected for cultivating at the highland area of Korea. Two B3C1 clones were crossed with Korean breeding lines and clonal selection for the progenies is still in progress.
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