Agronomic character identification and ornamental value evaluation of dwarf ornamental tomato germplasm resources
In order to screen out excellent dwarf ornamental tomato germplasm resources and breeding parents, improve the ornamental tomato breeding efficiency, 26 domestic and foreign dwarf ornamental tomato germplasm resources were used as experimental materials, and variation analysis, principal component a...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2021-04-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2020.09.021 |
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| Summary: | In order to screen out excellent dwarf ornamental tomato germplasm resources and breeding parents, improve the ornamental tomato breeding efficiency, 26 domestic and foreign dwarf ornamental tomato germplasm resources were used as experimental materials, and variation analysis, principal component analysis and cluster analysis were used to identify and evaluate 20 main agronomic traits; analytic hierarchy process was used to evaluate ornamental quality and select excellent germplasm resources with high ornamental value. The results showed that the genetic diversity of the main agronomic traits and ornamental value among the tested dwarf ornamental tomato germplasms were abundant. Among the 16 quantitative traits, fruit setting stage was weak variability trait, and other traits were medium variability, and there were no strong variability traits; the diversity index of the flower number per inflorescence was the lowest (1.00), and the soluble solid content was the largest (2.05). Among the four quality traits, the diversity index of leaf color was the smallest (0.96), and the fruit shape was the highest (1.63). The principal component analysis divided the main agronomic traits into four principal components, including the whole plant morphology factors, fruit and bunching factors, phenological factors, fruit color factors. The experimental materials were classified into three subgroups by systematic cluster analysis, which indicated that the agronomic characters of different groups had obvious specificity. In addition, the ornamental evaluation standard of ornamental tomato based on analytic hierarchy process was determined, and an evaluation model was constructed, in which the restriction layer of fruit morphology characteristics accounted for the largest weight in the restriction layer, and the ripe fruit color index layer occupied the largest weight in the index layer. The germplasm material numbered S1 with the highest ornamental value was screened out. The research results provide a theoretical basis for the application of excellent genetic resources and improving breeding parents of ornamental tomatoes. |
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| ISSN: | 1008-9209 2097-5155 |