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The combining ability and heterosis of sorghum sterile line and restorer line in spring-sown early maturing regions were studied to provide theoretical basis for the parent selection of sorghum hybrid combinations in the future. Using 31 sorghum as parent materials, 206 hybrid combinations were prepared by incomplete diallel cross design, and 13 main traits including plant height, panicle length and combining ability and heterosis of parents and their hybrid F1 were analyzed. The results showed that there were significant differences in various traits between the sterile and restorer lines of sorghum, and the combining ability of different materials was significantly different. Among the 31 materials, Ji 64A, SX44A, Ji 5535A, Ji 5575A, HLS×125×2999, HLS Zao and Ji R4334 had more advantages in plant height, panicle length, grain weight per panicle, yield, penultimate leaf angle, penultimate width, and antepenultimate leaf angle, etc. The general combining ability of other traits was also excellent, so the six materials were ideal parents. There was a large heterosis utilization potential in the hybrid combination, but the mid-parent heterosis was not prominent. Meanwhile, the yield of the hybrid combination was affected by both additive and non-additive effects. To select excellent parents attention should be paid to the comprehensive traits and general combining ability of the parents, as well as the special combining ability and the complementary effect of the parents.
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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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