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Please use this identifier to cite or link to this item: http://anchan.lib.ku.ac.th/agnet/handle/001/2354

ARN: TH201000002285
Authors: Acharaporn Na Lampang Noenplab
Poonsak Mekwatanakarn
อัจฉราพร ณ ลำปาง เนินพลับ
พูนศักดิ์ เมฆวัฒนากาญจน์
Authors' affiliation: Rice Department, Bangkok (Thailand). Bureau of Rice Research and Development. Phitsanulok Rice Research Center
Rice Department, Bangkok (Thailand). Bureau of Rice Research and Development. Ubon Ratchathani Rice Research Center
Authors' affiliation (Thai): กรมการข้าว สำนักวิจัยและพัฒนาข้าว ศูนย์วิจัยข้าวพิษณุโลก
กรมการข้าว สำนักวิจัยและพัฒนาข้าว ศูนย์วิจัยข้าวอุบลราชธานี
Title: ความหลากหลายของ pathotype ของเชื้อราสาเหตุโรคไหม้ข้าวในปี 2550/51 และยีนต้านทานกว้างขวางที่เป็นประโยชน์ในภาคเหนือตอนล่าง
Diversity of rice blast pathotype in 2007/2008 and broad-spectrum resistant genes for the lower north
Corporate authors (Thai): Rice Department, Bangkok (Thailand). Bureau of Rice Research and Development
Citation: [Proceedings of rice and temperate cereal crops annual conference 2009], Bangkok (Thailand), p. 208-219
Format Extent: 389 p.
Issue Date: 2009
Language: Th
Keywords: Rice
Blast
Pathotype
Diversity
Durable resistance
Pyricularia grisea
IRRI
Near isogenic lines (NILs)
Blast nursery
Single spore isolation
Broad resistant gene
Subject Classification(ASC): H20
F30
AGROVOC: Oryza sativa
Blight
Genes
Disease resistance
Fungi
Pathotypes
Isolation
Varieties
Thailand
Abstract: Breeding strategy for the Lower North of Thailand has set a goal for cultivars with durable resistance to rice blast since the causal agent (Pyricularia grisea Sacc.) possesses a great diversity for both genetic and pathotype. Pathotype is the pattern of response of different resistant genes to the tested pathogen in terms of compatible (susceptible) and incompatible (resistant) reactions using a differential set. Effective blast resistant genes for the Lower North of Thailand was continuously evaluated since 2003 through the IRRI' s 18 near isogenic lines (NILs) having 1 gene in each line. In 2007/2008, eighty isolates of P. grisea were collected from rice varieties having diverse genetic background from irrigated, rainfed, local to upland origins grown in the blast nursery and farmers' fields in Phitsanulok and the other Lower North provinces nearby. Pure cultures of the pathogen were obtained through the single spore isolation method and pathotyping was performed by testing all 80 isolates against NILs. There were 13 pathotypes characterized at 80 percent similarity. The pathogenic isolates tested were very aggressive since the most effective resistant genes showed only 25-33 percent degree of resistance. These genes were Pi 4a(t) (33.33 percent), Pi ta sup(2) (31.15 percent), Pi 1 from IRBL1-CL (29.03 percent) and Pi k, Pi k-p, Pi k-h (25.00 percent). Among these, Pi k-p was the most stable broad resistant gene during 2003-2008.
Format Extent: 389 หน้า
Availability : Rice Department, 50 Phahon Yothin Road, Chatuchak, Bangkok 10900, Thailand
Availability: กรมการข้าว
Appears in Collections:Rice Department

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