
Low-temperature stress caused phenotypic variation in germination and RNA-seq analysis for rapeseed (Brassica napus L.)
Jia-yu SONG, Gen-shui JIANG, Yu-tiao CHEN, Jian-yi ZHAO, Xiao-fu HONG
CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2023, Vol. 45 ›› Issue (6) : 1217-1226.
Low-temperature stress caused phenotypic variation in germination and RNA-seq analysis for rapeseed (Brassica napus L.)
For high efficient of rapeseed production by planting late-sowing cultivars in the lower reaches of the Yangtze River, material screening and mechanism of cold tolerance were carried out using 6 approved hybrid varieties and 6 temperature treatments were set. Seed germination characteristics and physiological indicators were studied under low temperature. RNA-seq technology was used for exploring germination differences under low temperature. Results showed that germination rate decreased under low temperature. Varieties Yueyou 1301 and Yueyou 1510 showed obvious advantages with respect to late sowing at low temperatures (<10℃). SOD activity were consistent with low temperature germination phenotype. Thus we identified 920 differentially-expressed genes (DGEs) that were involved in low temperature germination between Yueyou 1301 and Fengyou 737. Of these, 21 DEGs were related to abscisic acid pathway and starch-sucrose metabolism pathway. In summary, Yueyou 1301 had strong low temperature germination ability. The difference in seed germination ability at low temperature might be caused by hormone signal transduction, activation of reactive oxygen species scavenging systems, and carbohydrate metabolism homeostasis, which might explain the strong cold tolerance of Yueyou 1301.
Brassica napus L. / low temperature stress / seed germination / late sowing / RNA-seq {{custom_keyword}} /
Table 1 Detailed on tested materials表1 供试材料清单 |
品种名称 Variety | 父母本 Parents | 登记号 License number | 来源 Source |
---|---|---|---|
越优1203 Yueyou 1203 | MSL72A × SHAO1203 | GPD油菜(2017)330098 | 绍兴舜达种业有限公司 Shaoxing Shunda Seed Industry Co., Ltd. |
越优1301 Yueyou 1301 | MSL72A × SX11003 | GPD油菜(2017)330154 | 江山市郎峰种子有限公司 Jiangshan Langfeng Seed Industry Co., Ltd. |
越优1510 Yueyou 1510 | MSL72A × S151031 | GPD油菜(2020)330257 | 金华市三才种业公司 Jinhua Sancai Seeds Industry Company |
越优花叶15 Yueyou huaye 15 | 花叶A × SHAO1203 Huaye A × SHAO1203 | GPD油菜(2022)330048 | 浙江省农业科学院 Zhejiang Academy of Agricultural Sciences |
沣油737 Fengyou 737 | 湘5A × 6150R Xiang 5A × 6150R | GPD油菜(2017)430090 | 陕西荣华农业科技有限公司 Shaanxi Ronghua Agricultural Technology Co., Ltd. |
浙油51 Zheyou 51 | 沪油15/浙双6号 Huyou 15 × Zheshuang 5 | 浙审油2009001 | 浙江勿忘农种业股份有限公司 Zhejiang Wuwangnong Seed Shareholding Co., Ltd. |
Fig. 1 Low temperature germination ability of rapeseed seeds of different genotypes图1 不同基因型油菜种子低温萌发能力 |
Table 2 Primers used for RT-PCR verifying表2 RT-PCR 验证引物 |
引物名称 Name | 上游引物序列 Forward primer sequence (5΄–3΄) | 引物名称 Name | 下游引物序列 Reverse primer sequence (5΄–3΄) |
---|---|---|---|
ncbi_106370611-F | GAATACGCAGCTGGAGGAGA | ncbi_106370611-R | CTCCTGAAATGAGTTGCTGGA |
ncbi_106420290-F | CGGAGAAAATCGTTGTGGCT | ncbi_106420290-R | TGAATCCGGTCTAGCTCGTC |
ncbi_106447343-F | GTCTTTGGTGGTGGTGGTTC | ncbi_106447343-R | GATGGAAGTGTCAACGAGCC |
ncbi_106365510-F | TCGCTATGAACAACGCAGAC | ncbi_106365510-R | TCATGTCTGCTCCAGGTGAG |
ncbi_106376923-F | ATGGACGGTCAGGATTCGAG | ncbi_106376923-R | ATCACCTTTGCACTTCTCGC |
MSTRG.48536-F | GCGAACGTATTGTGCCTGAT | MSTRG.48536-R | CGAACGGCTAAAGACCCATG |
BRactin-F | GGCTCCTCTTAACCCAAAGGC | BRactin-R | CACACCATCACCAGAATCCAGC |
Fig. 2 Changes of antioxidant physiological indexes in different genotypes of rapeseed under low temperature conditions图2 不同基因型油菜低温下抗氧化生理指标 |
Fig. 3 PCA analysis of transcriptome samples and Venn diagrams of DEGs图3 转录组样品PCA分析和DEG韦恩图 |
Fig. 4 Phytohormone (ABA) signal and MAPK signal transduction metabolic pathways图4 植物激素(ABA)信号转导和MAPK信号转导代谢途径 |
Fig. 5 Sucrose metabolism pathway图5 蔗糖代谢途径 |
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