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Meng XIE, Yongpeng MA, Yurong CAO, et al. Research on Floral Syndrome and Breeding Systems of Rhododendron hemsleyanum, a Plant Species with Extremely Small Populations[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2023, 38(1): 95-103. DOI: 10.12101/j.issn.1004-390X(n).202207033
Citation: Meng XIE, Yongpeng MA, Yurong CAO, et al. Research on Floral Syndrome and Breeding Systems of Rhododendron hemsleyanum, a Plant Species with Extremely Small Populations[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2023, 38(1): 95-103. DOI: 10.12101/j.issn.1004-390X(n).202207033
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Research on Floral Syndrome and Breeding Systems of Rhododendron hemsleyanum, a Plant Species with Extremely Small Populations

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    • Abstract
  • PurposeTo study the floral syndrome and breeding system of Rhododendron hemsleyanum, a plant species with extremely small populations, and to provide a genetic breeding theoretical basis for the promotion of R. hemsleyanum as a native garden tree.
    MethodsThe status of the R. hemsleyanum wild population in Emei Mountain, Sichuan, were investigated, and its floral syndrome, pollen-ovule ratio, hybridization index and insects’ flower-visiting behavior were studied, as well as its breeding system in combination with artificial controlled pollination tests was researched.
    ResultsThe blooming period of R. hemsleyanum was mid-May; the hybridization index was five, the pollen-ovule ratio was 640.93±65.52; the fruiting rate of the natural control was 56.67%, and the fruiting rate of heterogeneous pollination was 86.67%; the main flower visitors were Apis cerana and A. dorsata.
    ConclusionThe best pollination period for R. hemsleyanum is at the peak of flowering (the 3rd-6th day of flowering), its breeding system is a mixed mating system that tends to be heterozygous, and the effective pollinators are A. cerana and A. dorsata.
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