Vol. 21 >B. Research Notes>IV. Genetics of disease and insect resistance |
25. | RFLP mapping of a new resistance gene for green rice leafhopper in Kanto PL10 |
K. TAMURA1, Y. FUKUTA2, M. HIRAE3, S. OYA4, I. ASHIKAWA3 and
T. YAGI3 1) Department of Lowland Research, National Agricultural Research Center for Kyushu Okinawa Region, NARO; Chikugo, 833-0041 Japan 2) Japan International Research Center for Agricultural Sciences, Tsukuba, 305-8686 Japan 3) Hokuriku Research Center, National Agricultural Research Center, NARO; Joetsu, 943-0193 Japan 4) Joetsu, 943-0154 Japan |
Kanto PL10, resistant line to green rice leafhopper (GRH), was bred from
crosses between SML17 and Nipponbare. Its cross combination is represented
as SML17/3*Nipponbare. In the present study, we determined the chromosomal
location of a new GRH resistance gene in Kanto PL10. analyzed with the software MAPMAKER/EXP ver.3.0. RFLP analysis using
F2 plants showed that the resistance gene was located between
Y3635R and C708 on chromosome 4 (Fig. 2). So far, five genes
for resistance to GRH have been mapped on rice chromosomes using RFLP
or simple sequence repeats (SSR) markers, Grh1 on chromosome 5(Tamura
et al. 1999), Grh2 and Grh4 on chromosome 11 and
3, respectively (Fukuta et al. 1998; Yazawa et al. 1998),
Grh3 (t) on chromosome 6 (Saka et al. 1996), and Grh5
on chromosome 8 (Fujita et al. 2003). There have been no genes
for resistance to GRH on chromosome 4. Therefore, we designated the new
resistance gene as Grh6 (Green rice leafhopper resistance 6). |
Vol. 21 >B. Research Notes>IV. Genetics of disease and insect resistance |