GENETIC DIFFERENTIATION BETWEEN POPULATIONS OF PLANTAGO-LANCEOLATA .1. LOCAL ADAPTATION IN 3 CONTRASTING HABITATS
GENETIC DIFFERENTIATION BETWEEN POPULATIONS OF PLANTAGO-LANCEOLATA .1. LOCAL ADAPTATION IN 3 CONTRASTING HABITATS
复制标题
DOI：
10.2307/2260782
复制
发表时间：
1991-03-01
影响因子：
5.5
通讯作者：
VANDERTOORN, J
中科院分区：
文献类型：
--
作者：
VANTIENDEREN, PH;VANDERTOORN, J
(1)采用交互移植试验，研究了3个不同草地样地披针叶车前种群的遗传分化和对当地条件的适应性。 在两个网站的“本地”人口的生存显着优于“外来”人口之一。(2)植物生长和形态在不同的环境条件下，在三个栖息地的反应。 然而，这三个群体始终不同的营养生长，生长习性，种子数时，成熟穗产生，并在所有网站的开花开始。(3)植物从早割的干草田开花早于植物从晚割的干草田;植物从牧场人口开花最后。 所有外来种群的种子产量相对于本地种群减少了40- 95%。(4)考虑到生殖性状的变化后，本地和外来人口之间的健身差异远高于由于单独在少年或成年阶段的生存差异。(5)虽然披针叶的表型是高度可塑的，如站点之间的巨大差异所示，但似乎遗传决定的植物发育差异得以维持，并对终身种子产量产生重大影响。
(1) Reciprocal-transplant experiments were used to study genetic differentiation and adaptation to local conditions in populations of Plantago lanceolata at three different grassland sites. At two sites survival of the 'native' population was significantly better than that of one of the 'alien' populations.(2) Plant growth and morphology varied in response to the different environmental conditions at the three habitats. Nevertheless, the three populations consistently differed in vegetative growth, growth habit, number of seeds when ripe spikes were produced, and onset of flowering at all sites.(3) Plants from an early-mown hayfield flowered earlier than plants from a late-mown hayfield; plants from a pasture population flowered last. Seed yield of all alien populations was reduced in relation to the native population by 40-95%.(4) Fitness differences between native and alien populations after taking variation in reproductive traits into account were much higher than differences due to survival in juvenile or adult stage alone.(5) Although the phenotype of P. lanceolata is highly plastic, as exemplified by large differences between sites, it appears that genetically determined differences in plant development are maintained and have a great impact on lifetime seed yield.