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| Studies on Technology for Hybrid Seed Production of Long Eggplant in Southwest China |
| ZHOU Shanshan，TAO Tao，ZOU Min，YANG Yang，WANG Yongqing，TIAN Shibin |
| Vegetable Research Institute，Chongqing Academy of Agricultural Sciences，Chongqing 401329，China |
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Abstract Taking ‘Yuqie No.5’ as test material and adopting orthogonal design experiment of 4 factors
and 3 levels L9（34），this paper studied the effects of different treatments on the yield of eggplant hybrid seed
production by comparing the seed yield，number of seed fruits，seed output per single fruit．The results
showed that among all treatments combined by 9 different factors，treatment 5（planting density 30 000
plants · hm-2），taking out the 1st and 2nd branches flowers，starting pollination from the 3rd branches，
emasculation in bud stage and re-pollination at flowering stage） obtained the highest yield of seed production
776.1 kg · hm-2．The results of range analysis showed that the factors influencing seed production
efficiency were pollination mode＞reserving commercial fruit＞starting branch of pollination＞planting
density．But，all these 4 factors had extreme significant effect on eggplant hybrid seed production．
Comprehensive comparing analysis indicated that the optimum seed production method was planting density
24 000 plants · hm-2，taking out the first and second branches flowers，starting pollination from the 3rd
branches，emasculation in bud stage and re-pollination at flowering stage，when conducting large-scale
eggplant hybrid seed production．
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Received: 27 April 2020
Published: 08 July 2020
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