Genotyping and lipid profiling of 601 cultivated sunflower lines reveals novel genetic determinants of oil fatty acid content.
BMC Genomics
; 22(1): 505, 2021 Jul 05.
Article
in En
| MEDLINE
| ID: mdl-34225652
ABSTRACT
BACKGROUND:
Sunflower is an important oilseed crop domesticated in North America approximately 4000 years ago. During the last century, oil content in sunflower was under strong selection. Further improvement of oil properties achieved by modulating its fatty acid composition is one of the main directions in modern oilseed crop breeding.RESULTS:
We searched for the genetic basis of fatty acid content variation by genotyping 601 inbred sunflower lines and assessing their lipid and fatty acid composition. Our genome-wide association analysis based on the genotypes for 15,483 SNPs and the concentrations of 23 fatty acids, including minor fatty acids, revealed significant genetic associations for eleven of them. Identified genomic regions included the loci involved in rare fatty acids variation on chromosomes 3 and 14, explaining up to 34.5% of the total variation of docosanoic acid (220) in sunflower oil.CONCLUSIONS:
This is the first large scale implementation of high-throughput lipidomic profiling to sunflower germplasm characterization. This study contributes to the genetic characterization of Russian sunflower collections, which made a substantial contribution to the development of sunflower as the oilseed crop worldwide, and provides new insights into the genetic control of oil composition that can be implemented in future studies.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Plant Oils
/
Fatty Acids
/
Helianthus
Country/Region as subject:
America do norte
/
Asia
/
Europa
Language:
En
Journal:
BMC Genomics
Journal subject:
GENETICA
Year:
2021
Type:
Article
Affiliation country:
RUSSIA