| 中国辣椒(Capsicum chinense)对象耳豆根结线虫的抗性鉴定及机理研究 |
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| 引用本文： | 田潇潇,姜秉政,曹振木,刘子记,凌鹏,谢尚潜,朱婕.中国辣椒(Capsicum chinense)对象耳豆根结线虫的抗性鉴定及机理研究[J].热带作物学报,2022,43(1):165-172. |
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| 作者姓名： | 田潇潇 姜秉政 曹振木 刘子记 凌鹏 谢尚潜 朱婕 |
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| 作者单位： | 1.海南大学园艺学院,海南海口 5702282.中国热带农业科学院热带作物品种资源研究所,海南海口 5711013.海南大学/热带特色林木花卉遗传与种质创新教育部重点实验室,海南海口 570228 |
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| 基金项目： | 国家自然科学基金地区科学基金项目(No.31760574);海南省普通高等学校研究生创新科研课题(No.Hys2020-232);海南省自然科学基金项目(No.321QN189)。 |
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| 摘 要： | 根结线虫(Meloidogyne spp.)是一类高度专化性的杂食性植物病原线虫.目前,世界上已报道的根结线虫种类有98种,我国危害农作物最为严重的根结线虫有6种,包括南方根结线虫(M.incognita)、北方根结线虫(M.hapla)、爪哇根结线虫(M.javanica)、花生根结线虫(M.arenaria)、拟禾...
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| 关 键 词： | 象耳豆根结线虫 中国辣椒 抗病性鉴定 线虫侵染量 木质素 |
| 收稿时间： | 2021-03-04 |
Identification of Capsicum chinense Germplasms Resistant to Meloi-dogyne enterolobii and Preliminary Analysis on Resistance Mechanism |
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| TIAN Xiaoxiao,JIANG Bingzheng,CAO Zhenmu,LIU Ziji,LING Peng,XIE Shangqian,ZHU Jie.Identification of Capsicum chinense Germplasms Resistant to Meloi-dogyne enterolobii and Preliminary Analysis on Resistance Mechanism[J].Chinese Journal of Tropical Crops,2022,43(1):165-172. |
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| Authors: | TIAN Xiaoxiao JIANG Bingzheng CAO Zhenmu LIU Ziji LING Peng XIE Shangqian ZHU Jie |
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| Institution: | 1. College of Horticulture, Hainan University, Haikou, Hainan 570228, China2. Tropical Crops Genetic Recourses Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China3. Hainan University / Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, Hainan 570228, China |
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| Abstract: | Meloidogyne spp. is highly specialized omnivorous plant pathogenic nematodes. At present, 98 species of root-knot nematodes have been reported in the world, and there are 6 species of root-knot nematodes that harm crops most seriously in China, including M. incognita, M. hapla, M. javanica, M. arenaria, M. graminicola and M. enterolobii. M. enterolobii has wide host range and strong pathogenicity. Selecting and breeding resistant varieties could be the most economic and efficient way to control this disease. Since M. enterolobii is causing larger and larger damage to chili pepper production, It is emergent for breeders to screen pepper germplasms with high M. enterolobii resistance to provide material premise for disease resistance breeding. The seedling inoculation identification method was used in this study, twenty-seven C. chinense germplasms were inoculated with M. enterolobii for 60 days to carry out resistance identification work. The gall index and egg mass index showed that there were significant differences among different C. chinense germplasms on nematode resistance. L529-10-1-2-1 had the largest gall index and egg mass index, l550-1-3 had the smallest gall index, and l518 × L535 had the smallest egg mass index. It can be inferred that l529-10-1-2-1 has the weakest disease resistance to M. enteroloblii, and l550-1-3 and l518 × L535 have the strongest disease resistance. According to the total value of the subordinate function values and clustering results, the 27 pepper germplasms could be divided into four categories: resistant, lowly resistant, susceptible and highly susceptible. The 16 resistant germplasms had subordinate function values higher than 1.60. The four lowly resistant germplasms had subordinate function values of 1.26-1.51. The five susceptible germplasms had subordinate function values of 0.64-0.93, and the two highly susceptible germplasms had subordinate function values lower than 0.42. Resistant L501M-1M and susceptible L529-10-1-2-1 were inoculated with M. enterolobii to measure the nematode number and lignin content in roots after 0, 3, 6, 9, 12, 15, 20, 25 and 30 days. The nematode number in resistant variety was much lower than that of L529-10-1-2-1, the susceptible variety. Furthermore, the development of nematode juveniles in resistant variety was relatively obstructed. Before inoculation, the lignin content of L501M-1M and L529-10-1-2-1 was very low. Whereas after inoculated with M. enterolobii, the lignin content of resistant variety L501M-1M was significantly higher than that of susceptible variety L529-10-1-2-1. As a result, lignin content was speculated to be related with M. enterolobii resistance in C. chinense. The results above could lay strong foundation for further research on the mechanism of root-knot nematode resistance in chili pepper. |
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| Keywords: | Meloidogyne enterolobii Capsicum chinense resistance identification invasion number of nematode lignin |
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