POPULATION STUDIES OF WHITE SPRUCE .1. EFFECTS OF SELF-POLLINATION
POPULATION STUDIES OF WHITE SPRUCE .1. EFFECTS OF SELF-POLLINATION
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DOI：
10.1139/x83-151
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发表时间：
1983-01-01
影响因子：
2.2
通讯作者：
PARK, YS
中科院分区：
文献类型：
--
作者：
FOWLER, DP;PARK, YS
对白色云杉（P. glauca（Moench）Voss）3个居群的20株树进行了自花授粉试验。最显著的影响是空种子的频率增加，平均超过90%，比可比的异花授粉高5-22倍。胚胎致死当量的平均数，虽然个体树的高度变化，平均为8.0，9.1和12.9的3个群体。自花授粉也导致发芽率略低，存活率降低。影响种子产量、发芽和存活至17岁的致死当量总数估计为12.6。自交对生长的影响在2岁时变得明显，并增加到17岁时，自花授粉的幼苗平均短44.5%，直径比无关交配的幼苗小63.7%。
The effects of self-pollination in white spruce, P. glauca (Moench) Voss, were examined in 20 trees in 3 populations. The most drastic effect is the increased frequency of empty seeds which averages over 90%, and is 5-22 times higher than that from comparable cross-pollinations. The average numbers of embryonic lethal equivalents, although highly variable for individual trees, averaged 8.0, 9.1 and 12.9 for the 3 populations. Self-pollination also resulted in slightly lower germination and reduced survival. The total number of lethal equivalents affecting seed yield, germination and survival to age 17 yr is estimated as 12.6. The effect of selfing on growth becomes evident at age 2 yr and increases to age 17 yr when seedlings from self-pollinations averaged 44.5% shorter and 63.7% smaller diameter than seedlings from unrelated matings.