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Screening on Appraisal Indices of Chilling (Humidity) Tolerance and Selecting of Chilling (Humidity)-Tolerant Cultivars in Melon

Author: SunYuHong
Tutor: XuYueJin
School: Huazhong Agricultural University
Course: Olericulture
Keywords: Melon Cold Tolerance Moisture Identification Index
CLC: S652
Type: Master's thesis
Year: 2002
Downloads: 190
Quote: 7
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Abstract

Melon (Cucumis melon L.) originated in Africa, is one of the world's top ten fruits. Melon likes the warm climate, early spring planting in eastern China, often by cold, rainy adverse effects, and therefore carry melon resistant to cold and moisture resistance is essential. Melon strong regional research in this area is also rarely cares. In this paper, a screening of the melon cold tolerance (wet) Identification Index, designed to take advantage of them to improve the efficiency of melon materials and species identification and screening, resilience breeding and production services. In this experiment, 10 different types of melon varieties, to study the seven kinds of different resistance to cold resistance, the correlation between the four kinds of moisture resistance physiological and biochemical indexes and indicators, from screening a simple, fast, effective the indicators of each 3 kinds of, and use them 25 copies of melon material resistant to cold (wet) Identification. The specific findings are summarized as follows: 1, Cold Tolerance: (1) at different temperatures on Germination force influential. 18 ℃, germination index and vigor index can be used to identify the melon seeds resistant to cold, but the vitality index more accurate, reliable, and germination rate can not be used to identify the melon seeds resistant to cold. (2) the chilling injury index and varieties of artificial simulation of climatic conditions of cold tolerance was highly significant negative correlation, and there is a certain difference between the varieties. The method is simple and easy to operate and can be used as a rapid identification of Melon Seedlings of cold tolerance indicator. (3) the percentage of melon seedlings conductance Conductivity Method. 7 ℃ conductance percentage of varieties of cold tolerance was a significant negative correlation, and very obvious difference between varieties, and thus can better identification of cold tolerance Melon Seedlings strong or weak. (4) low temperature affect the the melon seedlings soluble sugar content. 7 ℃ soluble sugar content varieties resistant to cold resistance was significantly positively correlated, and there is a certain difference between the varieties of cold tolerance varieties of soluble sugar content of the rate of increase is greater than the weak cold varieties resistant. The of 7 ℃ melon seedlings soluble sugar content size can represent varieties of cold tolerance strong or weak. (5) different low temperature affect the the melon seedlings proline content. Proline content of 18 ℃ different varieties there are differences, this difference in varieties resistant cold was highly significant positive correlation, but no significant difference between the varieties. Cold Tolerance varieties easily induced by low temperature. Varieties of cold tolerance strength of 7 ℃ low temperature processing, can be seen from all varieties of proline content and content changes. } Fuel greedy shoot the door. Only Luo and Bin Oh} - \L today of the knife I protect the enzyme system changes visible 11;. \Change of POD activity and MDA content with varieties of cold tolerance was: suffused with negative book! Off. 7 ° C Bu MDA content of varieties of cold tolerance was highly significant negative correlation, and cultivars differences Ming :: 'pen. Cold Tolerance:} production: the kinds of activity, the activity of small changes, MD man content. Available the change f PoD activity!! Eighty-one) eight-containing} 'seven identified different tongue the cold tolerance L l melon varieties. (7) L-dagger than r7 kinds of resistance between the Cold Tolerance fight! Correlation, from,} \resistance, cold resistance membership of Cold Tolerance [and clustering analysis, from screening out of the 14 parts of cold tolerance strong material. 2. humidity book! three studies:]: eight \exists between the 'Blade significant differences, humiliated two' aimed marked correlation were highly significant water-cooled sand ', B 4 kinds of {Xi addition to the number of adventitious roots · variety moisture in extremely significant positive correlation, the rest of' species indicators and goods Lee '(l) in the waterlogged 3d, tongue} l melon seedlings wilting index, from the Ministry of adventitious root number, conductance percentage and a negative correlation. The four kinds of indicators can be identified in the strength of moisture resistance of melon varieties. (2) the use of wilting index, number of adventitious roots, three kinds of indicators conductance l extreme rate of 25 melon material resistant gear l Once Identification of, through moisture resistance membership Qiu analysis,}, screened moisture resistance material.

Screening on Appraisal Indices of Chilling (Humidity) Tolerance and Selecting of Chilling (Humidity)-Tolerant Cultivars in Melon

Abstract

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