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Heat Tolerance Indexes Screening of Different Oncidium Cultivars and Construction of the Evaluation System
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Xiaoyan LUO1, 2, Yuanhua LUO3, Shuangshuang YI1, 2, Chonghui LI1, 2, Yi LIAO1, 2, Zhiqun ZHANG1, Bilan ZHENG1, Shunjiao LU1, 2, *
Chinese Journal of Tropical Crops | 2024, 45(7) : 1348 - 1358
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Chinese Journal of Tropical Crops | 2024, 45(7): 1348-1358
• Germplasm Resources, Genetics & Breeding •
Heat Tolerance Indexes Screening of Different Oncidium Cultivars and Construction of the Evaluation System
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Xiaoyan LUO1, 2, Yuanhua LUO3, Shuangshuang YI1, 2, Chonghui LI1, 2, Yi LIAO1, 2, Zhiqun ZHANG1, Bilan ZHENG1, Shunjiao LU1, 2, *
Affiliations
  • 1.Institute of Tropical Crops Genetic Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
  • 2.Key and Open Laboratory of Crop Genetic Resources and Germplasm Creation in South China, Ministry of Agriculture & Rural Affairs, Haikou, Hainan 571101, China
  • 3.Crop Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350000, China
Published: 2024-07-25 doi: 10.3969/j.issn.1000-2561.2024.07.006
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This study was conducted to compare the difference of heat tolerance of different Oncidium cultivars, and to establish a system for evaluating identification indexes of Oncidium heat tolerance. Seven indexes, including the leaf thickness, leaf water content and high temperature semi-lethal temperature (HLT50), of 38 common O. hybridum cultivars were measured, and the yellow leaf rate and heat injury grade (HIG) of different cultivars were observed under high temperature stress. The evaluation indexes of heat tolerance of Oncidium were screened by analyzing the correlation among different indexes and combining with principal component analysis, to establish the evaluation system of heat resistance of Oncidium cultivars. The results showed that the leaf thickness, leaf water content, HLT50, yellow leaf rate and HIG could well reflect the response of Oncidium to high temperature stress, which could be taken as the index for evaluating Oncidium heat tolerance. The 38 cultivars could be classified into three categories: heat-tolerant cultivars (12 cultivars), moderate heat-tolerant cultivars (3 cultivars) and non-heat-tolerant cultivars (23 cultivars) by cluster analysis based on heat-tolerant index. The results of this study could provide a reference for material selection of Oncidium in hot area, and also provide parental resource for the breeding of Oncidium with high heat tolerance.

Oncidium hybridum  /  cultivars  /  heat tolerance  /  cluster analysis  /  heat tolerance evaluation system
Xiaoyan LUO, Yuanhua LUO, Shuangshuang YI, Chonghui LI, Yi LIAO, Zhiqun ZHANG, Bilan ZHENG, Shunjiao LU. Heat Tolerance Indexes Screening of Different Oncidium Cultivars and Construction of the Evaluation System[J]. Chinese Journal of Tropical Crops, 2024 , 45 (7) : 1348 -1358 . DOI: 10.3969/j.issn.1000-2561.2024.07.006
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Year 2024 volume 45 Issue 7
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Article Info
doi: 10.3969/j.issn.1000-2561.2024.07.006
  • Receive Date：2023-08-01
  • Online Date：2026-06-24
  • Published：2024-07-25
Article Data
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History
  • Received：2023-08-01
  • Revised：2023-09-05
Funding
Affiliations
    1.Institute of Tropical Crops Genetic Resources, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
    2.Key and Open Laboratory of Crop Genetic Resources and Germplasm Creation in South China, Ministry of Agriculture & Rural Affairs, Haikou, Hainan 571101, China
    3.Crop Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350000, China
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https://castjournals.cast.org.cn/joweb/rdzwxb/EN/10.3969/j.issn.1000-2561.2024.07.006
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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