TY - JOUR
T1 - Genetic variation in resistance to blast (Pyricularia oryzae Cavara) in rice (Oryza sativa L.) germplasms of Bangladesh
AU - Khan, Mohammad Ashik Iqbal
AU - Latif, Mohammad Abdul
AU - Khalequzzaman, Mohammad
AU - Tomita, Asami
AU - Ali, Mohammad Ansar
AU - Fukuta, Yoshimichi
N1 - Funding Information:
This study was part of the collaborative research projects “Blast Research Network for Stable Rice Production” and “Rice Innovation for Environmentally Sustainable Production Systems” between the Bangladesh Rice Research Institute (BRRI) and the Japan International Research Center for Agricultural Sciences (JIRCAS), running from 2006 to 2020, funded by the Ministry of Agriculture, Forestry, and Fisheries of Japan. We thank the Japan Society for the Promotion of Science (JSPS) for providing a Post-Doctoral Fellowship to Mohanmad Ashik Iqbal Khan (P 14388) to support his involvement in this study. We thank the Rice Gene Bank, Genetic Resources and Seed Division (GRSD), Bangladesh Rice Research Institute (BRRI), Gazipur, Bangladesh for providing the Bangladesh rice accessions. We also thank Dr. N. Hayashi, National Institute of Agrobiological Sciences (NIAS), Japan for providing Japanese blast isolates.
Funding Information:
This study was part of the collaborative research projects ?Blast Research Network for Stable Rice Production? and ?Rice Innovation for Environmentally Sustainable Production Systems? between the Bangladesh Rice Research Institute (BRRI) and the Japan International Research Center for Agricultural Sciences (JIRCAS), running from 2006 to 2020, funded by the Ministry of Agriculture, Forestry, and Fisheries of Japan. We thank the Japan Society for the Promotion of Science (JSPS) for providing a Post-Doctoral Fellowship to Mohanmad Ashik Iqbal Khan (P 14388) to support his involvement in this study. We thank the Rice Gene Bank, Genetic Resources and Seed Division (GRSD), Bangladesh Rice Research Institute (BRRI), Gazipur, Bangladesh for providing the Bangladesh rice accessions. We also thank Dr. N. Hayashi, National Institute of Agrobiological Sciences (NIAS), Japan for providing Japanese blast isolates.
Publisher Copyright:
© 2017, Japanese Society of Breeding. All rights reserved.
PY - 2017
Y1 - 2017
N2 - Genetic variation in blast resistance was clarified in 334 Bangladesh rice accessions from 4 major ecotypes (Aus, Aman, Boro and Jhum). Cluster analysis of polymorphism data of 74 SSR markers separated these accessions into cluster I (corresponding to the Japonica Group) and cluster II (corresponding to the Indica Group). Cluster II accessions were represented with high frequency in all ecotypes. Cluster II was further subdivided into subclusters IIa and IIb. Subcluster IIa accessions were represented with high frequency in only Aus and Jhum ecotypes. Cluster I accessions were more frequent in the Aman ecotype than in other ecotypes. Distinct variations in resistance were found, and accessions were classified into 4 groups (A1, A2, B1 and B2) based on their reactions to standard differential blast isolates. The most susceptible group was A2 (which included susceptible variety Lijiangxintuanheigu, most of the differential varieties, and a few Bangladesh acces-sions), followed in order by A1, B2 and B1 (the most resistant). Accessions from 4 ecotypes fell with different frequencies into each of these resistance groups. These results demonstrated that Japonica Group accessions were found mainly in Aman, and Indica Group accessions were distributed across all ecotypes. Susceptible accessions were limited in Aus and Aman.
AB - Genetic variation in blast resistance was clarified in 334 Bangladesh rice accessions from 4 major ecotypes (Aus, Aman, Boro and Jhum). Cluster analysis of polymorphism data of 74 SSR markers separated these accessions into cluster I (corresponding to the Japonica Group) and cluster II (corresponding to the Indica Group). Cluster II accessions were represented with high frequency in all ecotypes. Cluster II was further subdivided into subclusters IIa and IIb. Subcluster IIa accessions were represented with high frequency in only Aus and Jhum ecotypes. Cluster I accessions were more frequent in the Aman ecotype than in other ecotypes. Distinct variations in resistance were found, and accessions were classified into 4 groups (A1, A2, B1 and B2) based on their reactions to standard differential blast isolates. The most susceptible group was A2 (which included susceptible variety Lijiangxintuanheigu, most of the differential varieties, and a few Bangladesh acces-sions), followed in order by A1, B2 and B1 (the most resistant). Accessions from 4 ecotypes fell with different frequencies into each of these resistance groups. These results demonstrated that Japonica Group accessions were found mainly in Aman, and Indica Group accessions were distributed across all ecotypes. Susceptible accessions were limited in Aus and Aman.
KW - Blast (Pyricularia oryzae Cavara)
KW - Ecotype
KW - Genetic variation
KW - Resistance
KW - Rice (Oryza sativa L.)
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U2 - 10.1270/jsbbs.17039
DO - 10.1270/jsbbs.17039
M3 - Article
AN - SCOPUS:85040988859
SN - 1344-7610
VL - 67
SP - 493
EP - 499
JO - Breeding Science
JF - Breeding Science
IS - 5
ER -