Vigor and Survival of Inbred and Outbred Progeny of Athyrium filix-femina
Vigor and Survival of Inbred and Outbred Progeny of Athyrium filix-femina
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DOI：
10.1086/297416
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发表时间：
1997-01
影响因子：
2.3
通讯作者：
J. Schneller;R. Holderegger
中科院分区：
文献类型：
--
作者：
J. Schneller;R. Holderegger
本文研究了蕨类植物鹅毛蕨配子体间和配子体内交配产生的孢子体形态和死亡率。在一项长期实验中，我们确定了杂种优势和/或遗传负荷在这种同质孢子蕨类物种中的相关性。配子体间杂交的后代，可能由杂合个体组成，表现出生长最旺盛、形态变异小、死亡率低的特点。配子体间自交产生的后代，可能包括具有不同水平纯合性的个体，表现出较大的形态变异，较高的死亡率和较小的平均叶长。叶面内自交（完全纯合子）的子代平均叶长最小，死亡率最高，形态变异较大。这些结果与开花植物杂种优势和遗传负荷的理论和实证研究一致。
Morphology and mortality of sporophytes resulting from intergametophytic and intragametophytic mating were studied in the fern Athyrium filix-femina. In a long-term experiment, we determined the relevance of heterosis and/or genetic load in this homosporous fern species. Progeny from intergametophytic crossing, probably consisting of heterozygous individuals, exhibited most vigorous growth, small morphological variation, and low mortality. Progeny resulting from intergametophytic selfing, likely to include individuals with various levels of homozygosity, showed larger morphological variation, higher mortality, and smaller mean leaf length. Progeny from intragametophytic selfing (completely homozygous) had the smallest mean leaf length, highest mortality, and considerable morphological variation. These results for a homosporous fern species agree with theoretical and empirical studies on heterosis and genetic load in flowering plants.