Mining the stable quantitative trait loci for agronomic traits in wheat (Triticum aestivum L.) based on an introgression line population.
BMC Plant Biol
; 20(1): 275, 2020 Jun 15.
Article
in En
| MEDLINE
| ID: mdl-32539793
ABSTRACT
BACKGROUND:
Human demand for wheat will continue to increase together with the continuous global population growth. Agronomic traits in wheat are susceptible to environmental conditions. Therefore, in breeding practice, priority is given to QTLs of agronomic traits that can be stably detected across multiple environments and over many years.RESULTS:
In this study, QTL analysis was conducted for eight agronomic traits using an introgression line population across eight environments (drought stressed and well-watered) for 5 years. In total, 44 additive QTLs for the above agronomic traits were detected on 15 chromosomes. Among these, qPH-6A, qHD-1A, qSL-2A, qHD-2D and qSL-6A were detected across seven, six, five, five and four environments, respectively. The means in the phenotypic variation explained by these five QTLs were 12.26, 9.51, 7.77, 7.23, and 8.49%, respectively.CONCLUSIONS:
We identified five stable QTLs, which includes qPH-6A, qHD-1A, qSL-2A, qHD-2D and qSL-6A. They play a critical role in wheat agronomic traits. One of the dwarf genes Rht14, Rht16, Rht18 and Rht25 on chromosome 6A might be the candidate gene for qPH-6A. The qHD-1A and qHD-2D were novel stable QTLs for heading date and they differed from known vernalization genes, photoperiod genes and earliness per se genes.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phenotype
/
Triticum
/
Quantitative Trait Loci
/
Plant Breeding
/
Life History Traits
/
Genetic Introgression
Type of study:
Prognostic_studies
Language:
En
Journal:
BMC Plant Biol
Journal subject:
BOTANICA
Year:
2020
Document type:
Article
Affiliation country:
China