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| Breeding of Pepper Cultivars in South China and Research Progress in Pepper Breeding Technology |
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| DOI：10.16768/j.issn.1004-874X.2020.11.007 |
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| Abstract: |
| Pepper is the most important vegetable in South China for transporting from south to north. Over the last more than 30 years, many scientific research institutes, universities and breeding companies in South China have worked together to breed numerous excellent cultivars with specific characteristics for South China, and have obtained good economic and social benefits. This study summarizes the research progress in new pepper cultivar breeding and the main breeding techniques in South China:（1）New pepper cultivar breeding: A series of cultivars belonging to green pepper, yellow pepper, cone pepper, line pepper, etc. were bred in South China, among which Yuejiao No. 1, Layou No. 4, Maojiao No. 4, Dongfang Shenjian, and Huifeng No. 2, held a large market share at that time.（2）Research on the transgenic technology of pepper with bacterial wilt resistance: Agrobacterium-mediated method was used to introduce the antibacterial peptide B and D genes into peppers to obtain transgenic pepper lines containing the antibacterial peptide B and D genes with bacterial wilt resistance and these lines were authorized by the Ministry of Agriculture and Rural Affairs for field experiments.（3）Research on the mechanism of pepper tolerance to high temperature and humidity: Multiple omics data obtained by physiology and biochemistry, transcript derived fragments, DNA methylation, expression profile and miRNA study under high temperature and humidity stress were used to reveal the mechanism of pepper tolerance to high temperature and humidity and it indicated that genes in the pepper hybrid cultivars showed a non-additive expression pattern.（4）Fine mapping of pepper phytophthora blight specific resistance genes: Pepper phytophthora blight resistant germplasm CM334 and susceptible germplasm 10399 were used for parents to construct a genetic segregation population and study the genetic rules of pepper phytophthora blight of root rot. The study indicated that the resistance trait of pepper phytophthora blight was controlled by a dominant single gene under the infection of the dominant Phytophthora capsici race（named Race3）in Guangdong Province, and the resistance gene PhR10 was mapped in the distance of about 2.6 Mb.（5）Research on pepper male sterility: the pepper sterile lines, maintainer lines and restorer lines were bred by backcrossing or reverse backcrossing system selection techniques to achieve the matching and application of the three-line combination and the mechanism of male sterility was studied. Suggestions were also put forward for future researches on pepper breeding in South China based on the climate characteristics and consumption habits in South China. |
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