Reproductive success of orchard and nonorchard pollens during different stages of pollen shedding in a Scots pine seed orchard
Reproductive success of orchard and nonorchard pollens during different stages of pollen shedding in a Scots pine seed orchard
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DOI：
10.1139/x26-121
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发表时间：
1996-06-01
期刊：
影响因子：
--
通讯作者：
Nikkanen, T
中科院分区：
文献类型：
--
作者：
Harju, AM;Nikkanen, T
研究了在樟子松种子园不同花粉脱落阶段暴露的巨球果种子中果园和非果园花粉的繁殖成功率。通过隔离然后暂时暴露于果园树花粉脱落的四个不同阶段来控制风授粉。使用同工酶标记和未检测到的配子模型确定种子作物中花粉污染的量。当整个授粉季节暴露于巨球菌中时，估计花粉污染程度为 48%。当果园树在实际花粉脱落之前暴露巨球菌时，污染最高（60%），而在果树最大花粉脱落期间暴露的巨球菌种子中污染最低（27%）。繁殖成功率有多种衡量方式：每次处理中产生的种子总数、每个巨球果成熟球果的比例或比例，以及每个球果或巨球果产生的种子数量。 1991 年，在种子果园树的花粉脱落量达到最大之前，繁殖成功率最高。大多数巨球菌变得具有接受性后几天，果园就会脱落花粉。
The reproductive success of orchard and nonorchard pollens was studied in seeds from megastrobili exposed during different stages of pollen shedding in a Pinus sylvestris L. seed orchard. Wind pollination was controlled experimentally by isolating and then temporarily exposing the megastrobili to four different stages of pollen shedding by orchard trees. The amount of pollen contamination in the seed crop was determined using isozyme markers and an undetected gamete model. The estimated level of pollen contamination was 48% when megastrobili were exposed during the entire pollination season. Contamination was highest (60%) when megastrobili were exposed before actual pollen shedding by orchard trees, and lowest (27%) in seeds from megastrobili exposed during maximum pollen shedding by orchard trees. Reproductive success was measured several ways: as the total number of seeds produced in each treatment, as the ratio or proportion of mature cones per megastrobilus, and as the number of seeds produced per cone or megastrobilus. In 1991, reproductive success was highest before maximum pollen shedding by seed orchard trees. Pollen shedding by orchard trees occurred a few days after most megastrobili became receptive.