Record Details

A trait specific QTL survey identifies NL44, a NERICA cultivar as a novel source for reproductive stage heat stress tolerance in rice

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title A trait specific QTL survey identifies NL44, a NERICA cultivar as a novel source for reproductive stage heat stress tolerance in rice
Not Available
 
Creator K.T. Ravikiran
S. Gopala Krishnan
K.K. Vinod
Gaurav Dhawan
Priyanka Dwivedi
Pankaj Kumar
Vijay Prakash Bansal
M. Nagarajan
P.K. Bhowmick
R.K. Ellur
H. Bollinedi
Madan Pal
A.C.R. Mithra
A.K. Singh
 
Subject Heat stress Grain yield plant-1 SSR Recombinant inbred line (RIL) Spikelet fertility
 
Description Not Available
Rice is sensitive to heat stress at gametogenesis and anthesis stages. For sustaining rice yields under the predicted threat of reproductive stage heat stress (RSHS), identification of tolerant donors as well as mapping of genes governing tolerance is crucial. Recently a NERICA (NEwRIce for AfriCA) rice genotype, NL44 has been reported tolerant to RSHS. The present study aims to survey a recombinant inbred line (RIL) population developed from the cross, Pusa Basmati 1 (PB1)/NL44 using markers linked to 54 RSHS quantitative trait loci (QTLs) through phenotypic and genotypic characterization. When exposed to RSHS, the susceptible parent PB1 and several RILs showed significant reduction for spikelet fertility and grain yield plant−1 relative to NL44. Both these traits and the estimated stress tolerance index (STI) showed a quantitative pattern of inheritance. Out of the 116 SSR markers surveyed, 31 markers were polymorphic between PB1 and NL44. No discernible associations could be found through a preliminary bulked segregant analysis with these markers. A subsequent single marker analysis revealed five minor QTLs, four for spikelet fertility under heat stress and two for STI-spikelet fertility, of which one QTL was mapped for both the traits. These QTLs, however, could explain a very low level of total phenotypic variation. Additionally, the cumulative additive effect of these QTLs could account only for a possible 30% of the contrast between PB1 and NL44. Thus, the study clearly establishes that NL44 has novel genomic regions for RSHS tolerance.
Not Available
 
Date 2021-07-23T09:24:50Z
2021-07-23T09:24:50Z
2020-11-24
 
Type Article
 
Identifier Ravikiran, K.T., Krishnan, S.G., Vinod, K.K., Dhawan, G., Dwivedi, P., Kumar, P., Bansal, V.P., Nagarajan, M., Bhowmick, P.K., Ellur, R.K. and Bollinedi, H., 2020. A trait specific QTL survey identifies NL44, a NERICA cultivar as a novel source for reproductive stage heat stress tolerance in rice. Plant Physiology Reports, 25(4), pp.664-676.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/49556
 
Language English
 
Relation Not Available;
 
Publisher Springer