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KMID : 0613820170270101111
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Journal of Life Science
2017 Volume.27 No. 10 p.1111 ~ p.1120
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Study on the Genetic Characteristics of Waterlogging Tolerant Pepper (Capsicum annuum L.) for Breeding Tolerant Varieties against Flooding Stress
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Yang Eun-Young
Chae Soo-Young
Hong Jong-Pil
Lee Hye-Eun
Park Eun-Joon
Moon Ji-Hye
Park Tae-Sung
Roh Mi-Young
Kim Ok-Rye
Kim Sang-Gyu
Kim Dae-Young
Lee Sun-Yi
Cho Myeong-Cheoul
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Abstract
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This study was conducted to select pepper lines that were tolerant to excessive water injury among the pepper germplasm and investigate the genetic characteristics of those lines to contribute to the breeding of pepper cultivars with stable productivity in abnormal weather. Each of the tolerant and susceptible lines went through immersion treatment, and differentially expressed genes between them were analyzed. The tolerant line showed increased expression of the CA02g26670 gene, which is involved in the CONSTANS protein pathway and regulation of flowering by day length, but it exhibited decreased expressions of CA01g21450, CA01g22480, CA01g34470, CA02g00370 and CA02g00380. The susceptible line showed increased gene expressions of CA02g09720, CA02g21290, CA03g16520, CA07g 02110, and CA12g17910, which are involved in the inhibition of proteolytic enzyme activity, DNA binding, inhibition of cell wall-degrading enzyme, and inhibition of nodulin, respectively. Meanwhile the expressions of CA02g02820, CA03g21390, CA06g17700 and CA07g18230 decreased in the susceptible line, in relation to calcium-ion binding, high temperature, synthesis of phosphocholine and cold stress, respectively. The expressions of genes related to apoptosis and peroxidase increased, while that of CA02g16990, which functions as a nucleoside transporter, decreased in both the tolerant and susceptible lines. Based on the different gene expressions between the tolerant and susceptible lines, further studies are needed on breeding abiotic stress-tolerant lines.
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KEYWORD
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Abiotic stress, Capsicum annuum, DEG, gene annotation, tolerant lines
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