Genetic variation of rice (Oryza sativaL.) germplasm in Myanmar based on genomic compositions of DNA markers.
The genetic diversity of 175 rice accessions from Myanmar, including landraces and improved types from upland and lowland ecosystems in five different areas-Western (hilly), Northern (mountainous), North and South-eastern (plateau), and Southern (plain)-was evaluated on the basis of polymorphism data for 65 DNA markers and phenol reactions. On the basis of the DNA polymorphism data, high genetic diversity was confirmed to conserve in the accessions from each ecosystem and area. And the accessions were classified into two cluster groups I and II, which corresponded to Indica Group and Japonica Group, respectively. Cluster group I accessions were distributed mainly in upland ecosystems; group II were distributed in lowland in the Southern area, and the distributions of dominant groups differed among areas. Rice germplasm in Myanmar has maintained high genetic diversity among ecosystems and areas. This information will be used for advanced studies in germplasm and rice breeding in Myanmar.
Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8572, Japan; Plant Biotechnology Center, Department of Agriculture, Ministry of Agriculture and Irrigation, Yangon, Republic of the Union of Myanmar.
Wunna
Faculty of Life and Environmental Sciences, University of Tsukuba , 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8572 , Japan.
Kazuo N
KN
Watanabe
Faculty of Life and Environmental Sciences, University of Tsukuba , 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8572 , Japan.
Ryo
R
Ohsawa
Japan International Research Center for Agricultural Sciences , 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686 , Japan.
Mitsuhiro
M
Obara
Japan International Research Center for Agricultural Sciences , 1-1 Ohwashi, Tsukuba, Ibaraki 305-8686 , Japan.
Seiji
S
Yanagihara
Plant Biotechnology Center, Department of Agriculture, Ministry of Agriculture and Irrigation , Yangon , Republic of the Union of Myanmar.
Pa Pa
PP
Aung
Tropical Agricultural Research Front, Japan International Research Center for Agricultural Sciences , 1091 Kawarabaru, Maezato, Ishigaki, Okinawa 907-0002 , Japan.
Yoshimichi
Y
Fukuta
Myanmar; genetic variation; germplasm; landrace; rice (Oryza sativa L.)