| Floral display and breeding system of Jatropha curcas L. |
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| 作者姓名： | Luo Chang-wei Li Kun Chen You Sun Yong-yu |
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| 作者单位： | Luo Chang-wei1 Li Kun1* Chen You2 Sun Yong-yu1 1Research Institute of Insect Resources，Chinese Academy of Forestry，Kunming 650224，P. R. China 2Yunnan Provincial Forestry Vocational College，Kunming 650224，P. R. China |
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| 基金项目： | This work was supported by the Open Project Program from Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Beijing Forestry University and in part by the Program "Construction of Plant Germplasm Bank and Resource Research of Jatropha ctrcas" from Station of Seed, Seedling and Afforestation Bases of China. |
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| 摘 要： | Plant flowering and breeding characteristics are important for us to understand the reproduction of plant populations. In this paper, we studied the reproduction characteristics of Jatropha curcas in Yuanjiang County (23°36′N, 101°00′E), Yunnan Province. The plant produces flowers in dichasial inflorescences. Normally, the flowers are unisexual, and male and female flowers are produced in the same inflorescence. Only a few male flowers are produced in an inflorescence, and fruits are produced only through pollination between different flowers from the same or different plants. By the treatments of emasculation, bagging and artificial pollination in this experiment, there were few but same fruit set ratios when the inflorescences were emasculated, bagged, or bagged with net, except artificial pollination treatments, which showed that Jatropha curcas could produce fruit through apomixis but not wind pollination. When the inflorescences were unbagged, unemasculated and with free pollination treatments, or bagged, emascu- lated and with artificial cross-pollination treatments, or unbagged, emasculated and with free pollination treatments, there were many fruits produced. It showed that Jatropha curcas shows outcrossing, is self-compatible, and demanding for pollinators. Normally, the male flowers open first and a few flowers bloom in one day in a raceme. These flowers last a long time in bloom. However, a large number of female flowers open from the third to the fifth day, with some female flowers opening first in a few raceme. This shows a tendency to promote xenogamy and minimize geitonogamy.
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| 关 键 词： | 异型杂交 花粉传输 胚珠种子 植物群体 |
| 收稿时间： | 6 October 2006 |
| 修稿时间： | 2006-10-06 |
Floral display and breeding system of <Emphasis Type="Italic">Jatropha curcas</Emphasis> L. |
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| Luo Chang-wei Li Kun Chen You Sun Yong-yu.Floral display and breeding system of Jatropha curcas L.[J].Forestry Studies in China,2007,9(2):114-119. |
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| Authors: | Luo Chang-wei Li Kun Chen You Sun Yong-yu |
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| Institution: | 1. Research Institute of Insect Resources, Chinese Academy of Forestry, Kunming 650224, P. R. China
2. Yunnan Provincial Forestry Vocational College, Kunming 650224, P. R. China |
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| Abstract: | Plant flowering and breeding characteristics are important for us to understand the reproduction of plant populations. In
this paper, we studied the reproduction characteristics of Jatropha curcas in Yuanjiang County (23°36′N, 101°00′E), Yunnan Province. The plant produces flowers in dichasial inflorescences. Normally,
the flowers are unisexual, and male and female flowers are produced in the same inflorescence. Only a few male flowers are
produced in an inflorescence, and fruits are produced only through pollination between different flowers from the same or
different plants. By the treatments of emasculation, bagging and artificial pollination in this experiment, there were few
but same fruit set ratios when the inflorescences were emasculated, bagged, or bagged with net, except artificial pollination
treatments, which showed that Jatropha curcas could produce fruit through apomixis but not wind pollination. When the inflorescences were unbagged, unemasculated and with
free pollination treatments, or bagged, emasculated and with artificial cross-pollination treatments, or unbagged, emasculated
and with free pollination treatments, there were many fruits produced. It showed that Jatropha curcas shows outcrossing, is self-compatible, and demanding for pollinators. Normally, the male flowers open first and a few flowers
bloom in one day in a raceme. These flowers last a long time in bloom. However, a large number of female flowers open from
the third to the fifth day, with some female flowers opening first in a few raceme. This shows a tendency to promote xenogamy
and minimize geitonogamy. |
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| Keywords: | Jatropha curcas floral display breeding system outcrossing index pollen-ovule ratio |
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