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Outline
In order to screen and identify the excellent highland barley germplasm resources in Ganzi Prefecture, Sichuan Province, 15 agronomic traits of 346 highland barley resources, collected in Ganzi Prefecture, were analyzed. The statistical results showed that the coefficients of variation for different agronomic traits of these resources ranged from 7.80% (grain length) to 58.05% (seed coat color), with the average of variation 25.52%. The genetic diversity index ranged from 0.30 (curled leaf) to 2.11 (flag leaf length). The genetic diversity index of 8 traits was greater than 2.0, including flag leaf length, stem diameter and plant height. The results of principal component analysis showed that the cumulative contribution rate of the six extracted principal components was 64.931%, and the contribution rate of the traits related to the spike type and yield of highland barley was larger. According to the comprehensive score (M value), the top 10 materials were HV-13, HV-12, HV-190, HV-193, HV-335, HV-112, HV-322, HV-184, HV-188, and HV-232, which had higher yield traits (average 1 000-grain weight of 47.62 g) and plump grain shape (average grain width of 3.79 mm and average grain length of 8.06 mm). The photosynthetic efficiency was high (average flag leaf width was 2.92 cm), and the overall performance was excellent. Cluster analysis showed that the 346 accessions were divided into 5 groups. Among them, 78 materials in group Ⅱ had both high yield and dwarf traits compared with others, which could be used as excellent resources for the subsequent selection of highland barley breeding parents. This study clarified that the highland barley in Ganzi Prefecture has rich genetic diversity, and selected some resources with better comprehensive characteristics, which can provide a theoretical basis for the excavation and creation of excellent germplasm resources of Ganzi highland barley.
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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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