Determination of genomic regions associated with carrot response to salinity stress

Daucus carota subsp. sativus is a vegetable of vast economic importance due to the high content of carotenoids.
Beta-carotene is a precursor of vitamin A, which is necessary in the human diet.
Carrot is regarded as sensitive to salinity stress.
The tolerance to salinity is based on various mechanisms that enable plant growth and development in soil containing elevated salt levels.
The aim of the study was to identify genomic region related to carrot response to salinity.
Salt stress reduced the number of germinating seeds, increased the time needed for germination and induced morphological changes in the seedlings.
Based on GBS of the F₂ population, genome regions have been identified in which the frequency of SNP alleles in the population under stress has changed as compared to the control population.
Most polymorphisms showing distorted segregation in the salt-treated population, but not in the control were found on chromosome 2. We indicate the chromosome 2 as containing the basic genetic determinants of carrot early response to salinity.

II International Symposium on Carrot and Other Apiaceae

K. Kwolek, M. Klimek-Chodacka, A. Macko-Podgórni, D. Grzebelus

abiotic stress, carrot seedlings, Daucus carota, genotyping, GBS, salt stress, SNP

https://doi.org/10.17660/ActaHortic.2019.1264.25