Evaluation Method of Drought Resistance of Watermelon Seedling Stage
An evaluation method and technology for watermelon seedlings, applied in the field of breeding, can solve problems such as the lack of a unified method for evaluating the drought resistance of watermelon seedlings, and achieve the effects of avoiding one-sidedness and instability, objective and accurate statistical results, and reducing blindness in breeding.
Active Publication Date: 2017-05-03
NORTHWEST A & F UNIV
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Problems solved by technology
[0025] Aiming at the defects and deficiencies in the prior art, the present invention solves the problem that there is no uniform and accurate method for evaluating the drought resistance of different watermelon strains at the seedling stage in the prior art, and proposes a method based on the drought damage index or Identification method of drought resistance of watermelon seedling stage for preliminary rapid evaluation or further and more accurate evaluation based on comprehensive membership function value
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Embodiment 1
[0073]In conjunction with Table 1, the test materials used in this example are 10 closely related species of watermelon strains from home and abroad, all provided by the West Melon Research Group of Northwest Agriculture and Forestry University in Yangling, Shaanxi Province, and the watermelon of these 10 strains In "Cold Tolerance of Watermelon Seedling Stage", Fan Xiaoyu, "China Excellent Master's Dissertation Full-text Database", Northwest Agriculture and Forestry University, 2012; and "Watermelon Blight Resistance Identification Method and Disease Resistance Mechanism Research", Wang Yongqi, "China Excellent Master's Dissertation Full-text Database", Northwest Agriculture and Forestry University; two literature records in 2010, including 3 wild-type resources and 7 cultivated-type resources.
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The invention discloses a method of evaluating the watermelon seedling-stage drought resistance. The evaluating method includes the steps that drought injury stress treatment is carried out on watermelon seedlings with four to five main leaves, drought injury index statistic and subordinative function value calculation are carried out on the processed different types, and the drought resistance of the watermelon seedlings are initially evaluated with the average drought injury indexes as the standard; it is stipulated that the types of the watermelon seedlings with the average drought injury indexes smaller than 0.8 time of the total average drought injury index of the tested watermelon seedlings in all the types are the high-drought-resistance types, the types of the watermelon seedlings with the average drought injury indexes ranging from 0.8 time to 1.3 times of the total average drought injury index are the medium-drought-resistance types, and the types of the watermelon seedlings with the average drought injury indexes larger than 1.3 times of the total average drought injury index are the low-drought-resistance types; then more accurate comprehensive evaluating is carried out on the drought resistance of the watermelon seedlings with average subordinative function values as the standard; it is stipulated that the types of the watermelon seedlings with the average subordinative function values smaller than 0.4 are the low-drought-resistance types, the types of the watermelon seedlings with the average subordinative function values ranging from 0.4 to 0.7 are the medium-drought-resistance types, and the types of the watermelon seedlings with the average subordinative function values larger than 0.7 are the high-drought-resistance types.
Description
technical field [0001] The invention belongs to the field of breeding, and in particular relates to an evaluation method for watermelon seedling drought resistance. Background technique [0002] Among the adversities suffered by plants, drought is one of the main abiotic stresses that limit plant growth and reduce crop yield [1]. The world's land area in arid, semi-arid and dry sub-humid regions is 3.6×10 7 km 2 , accounting for about 1 / 3 of the total land area of the world [2]. With global warming and the continuous deterioration of the environment, this data will likely continue to increase, making drought a major environmental problem restricting agricultural production. [0003] Watermelon (Citrullus lanatus (Thunb.) Matsum.et Nakai.) is an important economic horticultural crop. my country is the country with the largest watermelon production in the world [3], and the development of its industry plays an important role in increasing farmers' income and promoting ru...
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IPC IPC(8): A01G7/00A01G1/00
Inventor 张显莫言玲马建祥张勇杨建强李好刘炼红杨瑞平
Owner NORTHWEST A & F UNIV