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Improvement of Upland Rice Variety by Pyramiding Drought Tolerance QTL with Two Major Blast Resistance Genes for Sustainable Rice Production

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Title Improvement of Upland Rice Variety by Pyramiding Drought Tolerance QTL with Two Major Blast Resistance Genes for Sustainable Rice Production
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Creator Balija, Vishalakshi, Umakanth Bangale, Senguttuvel Ponnuvel, Kalyani Makarand Barbadikar, Srinivas Prasad Madamshetty, Sanjeeva Rao Durbha, Hari Yadla, and Sheshu Madhav Maganti
 
Subject blast resistance, drought stress, marker-assisted gene pyramiding, rainfed ecosystem, upland rice
 
Description Not Available
Varalu is an early maturing rice variety widely grown in the rainfed ecosystem preferred for its
grain type and cooking quality. However, the yield of Varalu is substantially low since it is being affected
by reproductive drought stress along with the blast disease. The genetic improvement of Varalu was done
by introgressing a major yield QTL, qDTY12.1, along with two major blast resistance genes i.e. Pi54 and
Pi1 through marker-assisted backcross breeding. Both traits were transferred till BC2 generation and
intercrossing was followed to pyramid the two traits. Stringent foreground selection was carried out using
linked markers as well as peak markers (RM28099, RM28130, RM511 and RM28163) for the targeted
QTL (qDTY12.1), RM206 for Pi54 and RM224 for Pi1. Extensive background selection was done using
genome-wide SSR markers. Six best lines (MSM-36, MSM-49, MSM-53, MSM-57, MSM-60 and MSM-63)
having qDTY12.1 and two blast resistance genes in homozygous condition with recurrent parent genome
of 95.0%௅96.5% having minimal linkage drag of about 0.1 to 0.7 Mb were identified. These lines showed
yield advantage under drought stress as well as irrigated conditions. MSM-36 showed better performance
in the national coordinated trials conducted across India, which indicated that improved lines of Varalu
expected to replace Varalu and may have an important role in sustaining rice production. The present
study demonstrated the successful marker-assisted pyramiding strategy for introgression of genes/QTLs
conferring biotic stress resistance and yield under abiotic stress in rice.
DBT
 
Date 2022-04-04T14:54:46Z
2022-04-04T14:54:46Z
2021-09-01
 
Type Research Paper
 
Identifier 6. Balija, V., Bangale, U., Ponnuvel, S., Barbadikar, K.M., Madamshetty, S.P., Durbha, S.R., Yadla, H. and Maganti, S.M., 2021. Improvement of Upland Rice Variety by Pyramiding Drought Tolerance QTL with Two Major Blast Resistance Genes for Sustainable Rice Production. Rice Science, 28(5), pp.493-500.
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http://krishi.icar.gov.in/jspui/handle/123456789/71177
 
Language English
 
Relation Not Available;
 
Publisher Not Available