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Title: | Identification and Mapping of Sheath Blight (Rhizoctonia solani kühn) Resistance Gene(s) in Rice (Oryza sativa L.) |
Other Titles: | Not Available |
Authors: | Sumit Kumar Aggarwal |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Indian Institute of Maize Research |
Published/ Complete Date: | 2019-01-01 |
Project Code: | Not Available |
Keywords: | sheath blight, mapping, O. nivara, O. rufipogon |
Publisher: | Not Available |
Citation: | Not Available |
Series/Report no.: | Not Available; |
Abstract/Description: | Sheath blight, caused by Rhizoctonia solani Kühn, is one of the major rice (Oryza sativa L.) diseases in South and South East India. No resistant variety is available against the disease worldwide. The present study aimed at identification of promising wild accessions as well as mapping for sheath blight resistance. A total of 472 wild accessions of rice species (67 from Oryza nivara and 405 from Oryza rufipogon) were evaluated during kharif 2015. Finally 12 from O. nivara and 19 from O. rufipogon were identified as promising accessions based on three years screening. Correlation study revealed that the different disease variables measured were in general significantly (P<0.05) correlated. All the genotypes and genotype x experiment interaction had a significant (P < 0.001) effect on the disease variables. The accessions under cluster groups showed different moderately resistant, moderately susceptible and susceptible reaction. Among all the accessions IRGC81941A showed maximum potential against sheath blight with least relative lesion height 22.80%.This accession was used as male parent to cross with elite and susceptible cultivar of rice PR121 to develop F2 population. The QTL mapping with 94 individuals revealed common QTLs for sheath blight traits such as lesion height, relative lesion height and disease score on the chromosomes 1, 2 and 9.The RM246 was identified as a putative marker on chromosome 1 which explained 31.55% phenotypic variations for relative lesion height. The identified promising accessions and QTLs can be exploited for sheath blight resistance breeding programme. |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Presentation |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Not Available |
Volume No.: | Not Available |
Page Number: | Not Available |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | Not Available |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/31395 |
Appears in Collections: | CS-IIMR-Publication |
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