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The phenotypic characters of sugarcane germplasm resources native of domestic were analyzed to study the law of genetic variation, so as to provide a theoretical basis for the selection of sugarcane genetic breeding parents and the construction of core germplasm population. 160 sugarcane varieties/parents from 8 different regions native of domestic were used as materials to evaluate the phenotypic traits with reference to the specification and data standard for sugarcane germplasm resources description. Most traits showed rich genetic diversity. Among them, the diversity index of the 20 quality traits was 0.07-1.40, with a mean of 0.84, which was the highest in bud type and the lowest in stalk shape. Five quantitative traits had 8.74%-38.26% of the coefficient of variation, with a mean of 17.69%, which was the highest in millable stalks (38.26%) and the smallest in stalk lengt (8.74%). The diversity index (H′) of the five traits was 1.46-1.83, with a mean of 1.64, which was the highest in stalk lengt (1.83) and the lowest in millable stalks (1.46). The average coefficient of variation of the tested materials in different regions was 13.56%-22.33%. The coefficient of variation of the variety population from Hainan was the largest (22.33%), and the dispersion of quantitative characters was the largest. The coefficient of variation of variety population from Fujian was the lowest (13.56%). By cluster analysis,160 accessions materials were divided into seven categories based on four traits, among them class 5 accounted for 90.62% of the total germplasm resources. This group resource has the characteristics of high yield and sugar content. The results could provide an important reference for the utilization of sugarcane germplasm resources, parental selection and variety breeding.
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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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