EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

A large-effect QTL for grain yield under reproductive-stage drought stress in upland rice



A large-effect QTL for grain yield under reproductive-stage drought stress in upland rice



Crop Science 47(2): 507-518



Genetic control of yield under reproductive-stage drought stress was studied in a population of 436 random F-3-derived lines from a cross between the upland rice (Oryza sativa L.) cultivars Vandana and Way Rarem. Screening was conducted under upland conditions at IRRI during the dry seasons of 2005 and 2006. Lines were evaluated in drought stress and nonstress trials in both years to identify QTL contributing to drought resistance. For QTL detection, a set of random lines and the highest and lowest-yielding lines under both stress and nonstress conditions were genotyped by 126 SSR markers. A QTL (qtl12.1) with a large effect on grain yield under stress was detected on Chromosome 12 in both years. The whole population was genotyped for additional markers on Chromosome 12, allowing QTL localization to a 10.2 cM region between SSR markers RM28048 and RM511. Under stress conditions, the locus also increased harvest index, biomass yield, and plant height while reducing the number of days to flowering. Under nonstress conditions, qtl12.1 did not significantly affect any trait. The additive effect of this QTL on grain yield under stress was 172 kg ha(-1) per year over the 2 yr of testing, representing 47% of the average yield under stress and explaining 51% of the genetic variance. The yield-increasing allele was derived from the susceptible parent, Way Rarem, suggesting an epistatic effect. This is the first QTL reported in rice having a large and repeatable effect on grain yield under severe drought stress in the field.

(PDF emailed within 0-6 h: $19.90)

Accession: 013225435

Download citation: RISBibTeXText

DOI: 10.2135/cropsci2006.07.0495



Related references

A large-effect QTL for rice grain yield under upland drought stress on chromosome 1. Molecular Breeding 30(1): 535-547, 2012

Meta-analysis of quantitative trait loci for grain yield and component traits under reproductive-stage drought stress in an upland rice population. Molecular Breeding 34: 283-295, 2014

Grain yield QTLs with consistent-effect under reproductive-stage drought stress in rice. Field Crops Research 161: 46-54, 2014

QDTY11, a major QTL for rice grain yield under reproductive-stage drought stress with a consistent effect in multiple elite genetic backgrounds. BMC Genetics 12(1): 89-0, 2011

qDTY₁.₁, a major QTL for rice grain yield under reproductive-stage drought stress with a consistent effect in multiple elite genetic backgrounds. Bmc Genetics 12(): 89-89, 2012

Influence of soil moisture stress during reproductive stage on physiological parameters and grain yield in upland rice. Oryza 36(2): 130-135, 1999

Identification and mapping of stable QTL with main and epistasis effect on rice grain yield under upland drought stress. Bmc Genetics 15(): 63-63, 2014

Yield potential of upland rice varieties under reproductive-stage drought and optimal water regimes in Nigeria. Plant Genetic Resources-Characterization and Utilization 16(4): 378-385, 2018

Effect of soil compaction on the grain yield of rice (Oryza sativa L.) under water-deficit stress during the reproductive stage. Plant Production Science 3(3): 316-322, 2000

Involvement of peduncle elongation, anther dehiscence and spikelet sterility in upland rice response to reproductive-stage drought stress. Environmental and Experimental Botany 75: 120-127, 2012

Grain yield and physiological traits of rice lines with the drought yield QTL qDTY12.1 showed different responses to drought and soil characteristics in upland environments. Functional Plant Biology 41(10-11): 1066-1077, 2014

Identification and characterization of large-effect quantitative trait loci for grain yield under lowland drought stress in rice using bulk-segregant analysis. Tag. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik 120(1): 177-190, 2010

Association Mapping of Yield and Yield-related Traits Under Reproductive Stage Drought Stress in Rice (Oryza sativa L.). Rice 10(1): 21-21, 2017

Grain yield of cultivated and weedy rice to water stress at reproductive stage. Journal of Food Agriculture and Environment 11(2): 742-746, 2013

Major QTL for enhancing rice grain yield under lowland reproductive drought stress identified using an O. sativa/O. glaberrima introgression line. Field Crops Research 163: 119-131, 2014