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Bacterial pustule (BP) is a leaf disease of soybean that is most common in Korea. Inoculation of 8ra, pathogen strain, to resistant and susceptible cultivars for finding the BP resistance gene (rxp) was much tried but the sequence of the exact gene is not found. This research performed in order to confirm the rxp gene near molecular marker by using the resistant and susceptible cultivars. Soybean BP resistance gene which related to region of near molecular marker could select the resistant cultivar. For the near molecular marker of rxp, reference genomics data available at sequenced Phytozome was used for designing molecular markers. The rxp was mapped between Satt372 and Satt486 on chromosome 17. According to previous study, rxp released in find mapping 7.2 Mbp to 7.3 Mbp on chromosome 17. In this study, we developed 3 random markers near from 6.6 Mbp to 7.3 Mbp on chromosome 17 identified to increase the genetic resolution of the rxp gene region using resistant and susceptible cultivars. Particularly, Rxp17-700 marker was mostly coincided resistance and susceptible genotype to rxp. This result suggests that Rxp17-700 marker will be more tightly linked to rxp gene. [ABSTRACT FROM AUTHOR]

A new soybean cultivar for soybean sprout, 'Wonheug' was developed at the National Institute of Crop Science (NICS) in 2009. 'Wonheug (Iksan63)' was released from the cross between F1 of YS1286 (Tawonkong/Jinju#1) and Jinju#1. It has purple flower, oval shaped leaf, tawny pubescence and small black seed (8.8 g/100 seed). Maturing date of 'Wonheug' is ten days later than check cultivar, 'Tawonkong'. Even though mosaic symptom can be observed by artificial inoculation, 'Wonheug' is tolerant to virus and bacterial pustule at field. It has similar tolerance to a check cultivar for excess water and seed spot. 'Wonheug' produce more soy-sprout than a check cultivar because it shows high in germination ratio, low in rate of abnormal germination and hard seed. The average yield of 'Wonheug' was 2.34 ton per hectare in the regional yield trial (RYT) carried out for three years from 2007 to 2009, which was 12 percent higher than check cultivar, 'Tawonkong' [ABSTRACT FROM AUTHOR]