Full
Outline
Drought is the main cause of crop yield reductions, and its impact is greater than all other stresses combined. Therefore, the selection of wheat germplasm with excellent drought resistance is of great significance to ensure China's food security. In this study, 140 wheat varieties (lines) at home and abroad were used as research materials, and 10 morphological indices such as plant height, stem nodes traits, and flag leaves traits were measured under two treatments, control and drought in the field. Correlation analysis, principal component analysis, membership function method, and cluster analysis were used to comprehensively evaluate the drought resistance of wheat varieties (lines). The results of correlation analysis showed that there was no significant correlation between the drought resistance coefficient and the length of each node, but it was significantly positively correlated with plant height and flag leaf length and width. Principal component analysis was carried out on the drought resistance values of each index, and a total of five principal components were extracted, which explained 78.450% of the total variance. Based on the weights and membership function of each index, the comprehensive drought resistance evaluation index(D value) of the 140 wheat varieties (lines) was calculated, and the cluster analysis was carried out by R studio software. The results showed that the wheat varieties were divided into five drought resistance grades:highly drought resistant type, relatively drought resistant type, moderately drought resistant type, more sensitive type, and highly sensitive type. Among them, the three wheat varieties with high drought resistant type were Xiaoyan 6, Lunxuan 715 and Lantian 10, and their D values were 0.548, 0.520, and 0.493, respectively.
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| 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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