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Importance of population size for offspring fitness at conservation of the gene pool of cultivars

机译：种群大小对后代适应性在品种基因库保存中的重要性

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Effective population size for conservation of cultivated plants was studied in Coreopsis grandiflora on populations in variants of 1, 5, 10, 30, 50 and 100 individuals. In five consecutive years these traits were studied on seeds originating from parental populations: seed number and weight per infructescence, thousand seed weight and germination. Plant height and flower size were investigated in a field trial. The influence of population size was expressed mainly in traits of early life-history stages. Inbreeding depression influenced germination already in the first year and was similar for the five years while seed weight was influenced from the second year. In the fifth year there were significant differences among variants of 30 individuals and less and variant of 50 individuals in all evaluated traits. The results document that mostly cross-pollinated cultivars of a population smaller than 50 individuals are exposed to impairment. The population of 10 individuals and less is at risk of extinction. This result will be influenced by the level of cross-pollination and degree of selection.
机译：在金鸡菊（Coreopsis grandiflora）中对1、5、10、30、50和100个个体的变体进行了研究，以保护栽培植物的有效种群规模。在连续五年中，对来自亲本种群的种子进行了这些性状研究：种子的数量和单果重，千粒重和发芽率。在田间试验中调查了植物的高度和花的大小。人口规模的影响主要表现在生活史早期的特征上。近亲繁殖抑郁症已经在第一年影响发芽，并且在五年中相似，而种子重量从第二年开始受到影响。在第五年中，在所有评估的性状中，不超过30个个体的变异和不超过50个个体的变异之间存在显着差异。结果表明，人口少于50个个体的大多数异花授粉品种都遭受了损害。 10人及以下的人口面临灭绝的危险。该结果将受异花授粉水平和选择程度的影响。

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