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Genetic variation of rice (Oryza sativa L.) germplasm in Cambodia.

Authors
  • Orn, Chhourn1
  • Saito, Hiroki2
  • Khan, Mohammad Ashik Iqbal3
  • Nhuiyan, Mohammad Rajiwan3
  • Vathany, Thun1
  • Khay, Sathaya1
  • Makara, Ouk1
  • Fukuta, Yoshimichi2
  • 1 Plant Breeding Division, Cambodian Agricultural Research and Development Institute (CARDI), Phnom Penh, Cambodia. , (Cambodia)
  • 2 Tropical Agriculture Research Front (TARF), Japan International Research Center for Agricultural Sciences (JIRCAS), 1019-1 Kawarabaru, Ishigaki, Okinawa 907-0002, Japan. , (Japan)
  • 3 Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh. , (Bangladesh)
Type
Published Article
Journal
Breeding science
Publication Date
Dec 01, 2020
Volume
70
Issue
5
Pages
576–585
Identifiers
DOI: 10.1270/jsbbs.20052
PMID: 33603554
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Genetic variations of 179 rice (Oryza sativa L.) accessions from Cambodia were clarified based on the analyses for heading date, chromosome components, and blast resistance. The dominant accessions were found in three regions; early heading in North East (NE), medium in Central (CT), and late in South East (SE) along the Mekong River in the investigation at Ishigaki, Japan. In contrast, wide variations were observed in two regions, South West (SW) and North West (NW) located around Tonle Sap Lake. Polymorphism data of SSR markers showed that accessions were classified into Japonica Group (cluster Ib), and Indica Groups (IIa and IIb). In the NW and SW, the accessions of all three clusters were found, but these accessions in NE, CT, and SE, were limited to one or two clusters. Accessions were classified again into two clusters, A1 as having high resistance and A2 as having moderate resistance. Remarkable differences of these frequencies of clusters, A1 and A2, were found in the SE, SW, and NW, and similar with these of the whole accessions were in NE and CT. Rice accessions varied among the five regions, and there was a dramatic difference between the regions along Mekong River and the regions around Tonle Sap Lake. Copyright © 2020 by JAPANESE SOCIETY OF BREEDING.

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