

FOLLOWUS
1.College of Marine Life Sciences, Ocean University of China(OUC), Qingdao 266003, China
2.Key Laboratory of Marine Genetics and Breeding of Ministry of Education, OUC, Qingdao 266003, China
3.College of Fisheries, OUC, Qingdao 266003, China
4.Institute of Evolution and Marine Biodiversity, OUC, Qingdao 266003, China
GUO Li, qdguoli@139.com
YANG Guanpin, yguanpin@ouc.edu.cn
收稿:2019-07-22,
录用:2019-9-9,
网络首发:2019-10-16,
纸质出版:2020-11
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Digging out molecular markers associated with low salinity tolerance of
Sijie LIANG, Zhongyi ZHANG, Hang LIU, et al. Digging out molecular markers associated with low salinity tolerance of
Digging out molecular markers associated with low salinity tolerance of
Sijie LIANG, Zhongyi ZHANG, Hang LIU, et al. Digging out molecular markers associated with low salinity tolerance of
Nannochloropsis oceanica
is a marine microalgal species with both economic value and biological importance. It grows fast
contains rich oils
reproduces asexually
holds a small and haploidy genome
and is easy to be modified genetically. However
the genetic study of
N. oceanica
is scarce. Very less genetic bases of its traits have been deciphered
and no gene has been isolated from it with the function verified simultaneously via either genetic or reverse genetic approaches or both (de novo cloned). Changing medium salinity may aid to control harmful organisms met during large scale cultivation. As a stress
it may also facilitate the accumulation of desirable chemicals including fatty acids. In order to decipher the genetic basis of the low salinity tolerance of
N. oceanica
we mutated
N. oceanica
with Zeocin. In total
five mutant bulks were constructed at equal number of cells
100 mutants each
which were tolerant to a discontinuous serial of salinities from that of 100% of f/2 to that of a mixture of 4% of f/2 and 94% of BG11. The bulks were genotyped through whole genome re-sequencing and analyzed with bulked mutant analysis (BMA) newly modified from bulked segregant analysis (BSA). In total
47 SNPs and 112 InDels were found to associate with the low salinity tolerance
and around them a set of low salinity tolerance associating genes were identified. A set of annotatable genes commonly found between control and different salinities indicated that the genes functioning in gene expression
energy metabolism and cellular structure may be involved in the low salinity tolerance. These associating molecular markers and genes around them were not enough for outlining the physiological mechanism underlining the tolerance; however they should aid to improve
N. oceanica
genetically.
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