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Mapping QTL hotspots associated with weed competitive traits in backcross population derived from Oryza sativa L. and O. glaberrima Steud

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Title Mapping QTL hotspots associated with weed competitive traits in backcross population derived from Oryza sativa L. and O. glaberrima Steud
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Creator Muralidhara B, Anantha MS, Senguttuvel P, Lokeh R, Patil B, Manoj A, Madhav MS, Sundaram RM, Shashidhar KS, Tuti MD, Sreedevi B, Brajendra P, Rathod S, Barbadikar KB, Suneetha K, Rao LVS, Mondal TK, Gireesh C
 
Subject QTL hotspots
weed competitive traits
Oryza sativa L
O. glaberrima Steud
Rice
 
Description Not Available
To improve grain yield under direct seeded and aerobic conditions, weed competitive ability of a rice genotype is a key desirable trait. Hence, understanding and dissecting weed competitive associated traits at both morphological and molecular level is important in developing weed competitive varieties. In the present investigation, the QTLs associated with weed competitive traits were identifed in BC1F2:3 population derived from weed competitive accession of O. glaberrima (IRGC105187) and O. sativa cultivar IR64. The mapping population consisting of 144 segregating lines were phenotyped for 33 weed competitive associated traits under direct seeded condition. Genetic analysis of weed competitive traits carried out in BC1F2:3 population showed signifcant variation for the weed competitive traits and predominance of additive gene action. The population was genotyped with 81 genome wide SSR markers and a linkage map covering 1423 cM was constructed. Composite interval mapping analysis identifed 72 QTLs linked to 33 weed competitive traits which were spread on the 11 chromosomes. Among 72 QTLs, 59 were found to be major QTLs (> 10% PVE). Of the 59 major QTLs, 38 had favourable allele contributed from the O. glaberrima parent. We also observed nine QTL hotspots for weed competitive traits (qWCA2a, qWCA2b, qWCA2c, qWCA3, qWCA5, qWCA7, qWCA8, qWCA9, and qWCA10) wherein several QTLs co-localised. Our study demonstrates O. glaberrima species as potential source for improvement for weed competitive traits in rice and identifed QTLs hotspots associated with weed competitive traits.
Department of Biotechnology, Government of India Grant no. BT/PR17115/NER/95/434/2015.
 
Date 2021-08-04T05:56:20Z
2021-08-04T05:56:20Z
2020-12-16
 
Type Research Paper
 
Identifier Bharamappanavara, M., Siddaiah, A.M., Ponnuvel, S. et al. Mapping QTL hotspots associated with weed competitive traits in backcross population derived from Oryza sativa L. and O. glaberrima Steud.. Sci Rep 10, 22103 (2020). https://doi.org/10.1038/s41598-020-78675-7
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http://krishi.icar.gov.in/jspui/handle/123456789/52819
 
Language English
 
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Publisher Not Available