Breeding for low-temperature stress tolerance in Hevea brasiliensis: screening of newly developed clones using latex biochemical parameters

2022 ◽  
Author(s):  
Suparna V. Ajith ◽  
Neethu N. Nair ◽  
M. B. Mohamed Sathik ◽  
T. Meenakumari
Keyword(s):  
Low Temperature ◽  
Stress Tolerance ◽  
Temperature Stress ◽  
Hevea Brasiliensis ◽  
Biochemical Parameters ◽  
Low Temperature Stress

scholarly journals Towards enhanced low temperature stress tolerance in tomato : An approach

2018 ◽  
Vol 39 (4) ◽  
pp. 529-535 ◽  
Author(s):  
Y.K. Meena ◽  
◽  
D.S. Khurana ◽  
Nirmaljit Kaur ◽  
Kulbir Singh ◽  
...  
Keyword(s):  
Low Temperature ◽  
Stress Tolerance ◽  
Temperature Stress ◽  
Low Temperature Stress

scholarly journals Genome-Wide Association Mapping Unravels the Genetic Control of Seed Vigor under Low-Temperature Conditions in Rapeseed (Brassica napus L.)

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 426
Author(s):  
Tao Luo ◽  
Yuting Zhang ◽  
Chunni Zhang ◽  
Matthew N. Nelson ◽  
Jinzhan Yuan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Stress Tolerance ◽  
Candidate Genes ◽  
Temperature Stress ◽  
Seed Vigor ◽  
Low Temperature Stress ◽  
Brassica Napus L ◽  
Temperature Conditions ◽  
Genome Wide ◽  
Tolerance Indices

Low temperature inhibits rapid germination and successful seedling establishment of rapeseed (Brassica napus L.), leading to significant productivity losses. Little is known about the genetic diversity for seed vigor under low-temperature conditions in rapeseed, which motivated our investigation of 13 seed germination- and emergence-related traits under normal and low-temperature conditions for 442 diverse rapeseed accessions. The stress tolerance index was calculated for each trait based on performance under non-stress and low-temperature stress conditions. Principal component analysis of the low-temperature stress tolerance indices identified five principal components that captured 100% of the seedling response to low temperature. A genome-wide association study using ~8 million SNP (single-nucleotide polymorphism) markers identified from genome resequencing was undertaken to uncover the genetic basis of seed vigor related traits in rapeseed. We detected 22 quantitative trait loci (QTLs) significantly associated with stress tolerance indices regarding seed vigor under low-temperature stress. Scrutiny of the genes in these QTL regions identified 62 candidate genes related to specific stress tolerance indices of seed vigor, and the majority were involved in DNA repair, RNA translation, mitochondrial activation and energy generation, ubiquitination and degradation of protein reserve, antioxidant system, and plant hormone and signal transduction. The high effect variation and haplotype-based effect of these candidate genes were evaluated, and high priority could be given to the candidate genes BnaA03g40290D, BnaA06g07530D, BnaA09g06240D, BnaA09g06250D, and BnaC02g10720D in further study. These findings should be useful for marker-assisted breeding and genomic selection of rapeseed to increase seed vigor under low-temperature stress.

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