Development of New Sets of International Standard Differential Varieties for Blast Resistance in Rice (<I>Oryza sativa</I> L.)

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概要

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• The IRRI-Japan Collaborative Research Project has been developing new sets of differential varieties for resistance to blast disease (<I>Pyricularia grisea</I> Sacc.) in rice (<I>Oryza sativa</I> L.). The first international standard differential variety set composed of monogenic lines for 24 kinds of resistance genes (<I>Pia, Pib, Pii, Pik, Pik-h, Pik-m, Pik-p, Pik-s, Pish, Pit, Pita, Pita-2, Piz, Piz-5</I> (= <I>Pi2</I>)<I>, Piz-t, Pi1, Pi3, Pi5</I>(t), <I>Pi7, Pi9, Pi11</I>(t), <I>Pi12</I>(t), <I>Pi19</I>(t), and <I>Pi20</I>) was released and has been widely used in various countries. Furthermore, the project has been developing near-isogenic lines (NILs) for blast resistance with three kinds of genetic backgrounds, a Japonica-type variety Lijiangxintuanheigu (LTH), an Indica-type variety CO39, and a newly developed 'universal susceptible' line US-2 which was derived from a cross between Indica and Japonica-type susceptible varieties. A total of 23 lines for 14 kinds of resistance genes, <I>Pia</I>, <I>Pib</I>, <I>Pik</I>, <I>Pik-h</I>, <I>Pik-s</I>, <I>Pita</I>, <I>Pita-2</I>, <I>Piz-5</I> (= <I>Pi2</I>), <I>Piz-t</I>, <I>Pi1</I>, <I>Pi3</I>, <I>Pi5</I>(t), <I>Pi7</I>, and <I>Pi9</I>, have been developed by the recurrent backcross method using the monogenic lines with the LTH genetic background. Twenty lines for 14 kinds of resistance genes, <I>Pib</I>, <I>Pik</I>, <I>Pik-h</I>, <I>Pik-m</I>, <I>Pik-p</I>, <I>Pik-s</I>, <I>Pish</I>, <I>Pita</I>, <I>Pita-2</I>, <I>Piz-5</I> (= <I>Pi2</I>), <I>Piz-t</I>, <I>Pi1</I>, <I>Pi5</I>(t), and <I>Pi7</I> have been developed with the CO39 genetic background. Moreover, a universal susceptible rice line, US-2, which has not been known to have any blast resistance genes in the genetic background, and can be cultivated easily under both tropical and temperate conditions, is also being used for the development of NILs as the next generation of differential varieties. These lines are offered as gene sources for breeding of blast resistance and as sets of international standard differential varieties used for the study of blast disease.

• 独立行政法人　国際農林水産業研究センターの論文

著者

• Kato Hiroshi

  Rice Breeding Research Team National Institute Of Crop Science

• IMBE Tokio

  Rice Breeding Team for Low Cost, National Institute of Crop Science (NICS)

• Telebanco-YANORIA Mary

  Plant Breeding, Genetics, and Biotechnology, International Rice Research Institute (IRRI)

• FUKUTA Yoshimichi

  Biological Resources Division, Japan International Research Center for Agricultural Science (JIRCAS)

• KOBAYASHI Nobuya

  Plant Breeding, Genetics, and Biotechnology, International Rice Research Institute (IRRI)

• TSUNEMATSU Hiroshi

  Biological Resources Division, Japan International Research Center for Agricultural Science (JIRCAS)

• KOBAYASHI Nobuya

  Plant Breeding, Genetics, and Biotechnology Division, International Rice Research Institute (IRRI)

関連論文

• A loss-of-function mutation of rice DENSE PANICLE1 causes semi-dwarfness and slightly increased number of spikelets
• Genetic and Breeding Analysis of Blast Resistance in Elite Indica-type Rice (Oryza sativa L.) Bred in International Rice Research Institute
• Development of New Sets of International Standard Differential Varieties for Blast Resistance in Rice (Oryza sativa L.)
• Resistance Genes and Selection DNA Markers for Blast Disease in Rice (Oryza sativa L.)
• Characteristics of Iron Tolerant Rice Lines Developed at IRRI under Field Conditions

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