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| Effects of Different Sowing Dates on Sex Type and Lateral Stem Development of Xishuangbanna Cucumber |
| SHEN Di, LI Xi-xiang, SONG Jiang-ping, WANG Hai-ping, QIU Yang |
| Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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Abstract Xishuangbanna cucumber（Cucumis sativus L. var. xishuangbannanesis Qi et Yuan）is one variation found only in China until now. Sowed in 8 different months in greenhouse respectively, the sex type and lateral stem of 2 germplasms were detected. The result indicated that the indexes of sex type and lateral stem development of Xishuangbanna cucumber were closely related to temperature and daylight. The development of female flowers and lateral stems of 2 germplasms expressed opposite tendency. Correlation analysis revealed a highly significant, positive association between the first pistillate flower bearing node and average temperature in greenhouse and significantly negative correlation between the percentage of nodes with female flowers to total nodes and total solar radiation. The above analysis showed that Xishuangbanna cucumbers were a kind of germplasm, which was sensible to low temperature and short daylight. The optimum sowing date in the protected field in Beijing was from the middle of August to the middle of February in the next year.
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Received: 25 October 2010
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