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首页> 外文期刊>Heredity: An International Journal of Genetics >Natural selection causes microscale allozyme diversity in wild barley and a lichen at 'Evolution Canyon', Mt. Carmel, Israel.
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Natural selection causes microscale allozyme diversity in wild barley and a lichen at 'Evolution Canyon', Mt. Carmel, Israel.

机译：自然选择会导致野生大麦和山顶'Evolution Canyon'的地衣中的微量同工酶多样性。以色列卡梅尔。

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摘要

Allozymic diversity was studied for proteins encoded by 28 putative loci in 170 plants of wild barley, Hordeum spontaneum, and for 13 loci in 78 different thalli of the lichen Caloplaca aurantia, from the Lower Nahal Oren microsite, Mt. Carmel, Israel, informally designated Evolution Canyon. The samples of wild barley were collected from six stations: three (upper, middle, lower) on the south-facing slope (SF-slope) and three (lower, middle, upper) on the north-facing slope (NF-slope). The samplesof C. aurantia were collected from three stations: two (middle and upper) on the SF-slope and one (upper) on the NF-slope. Higher solar radiation on the SF- than on the NF-slope makes it warmer, drier, spatiotemporally more heterogeneous, and climatically more fluctuating and stressful. Consequently, it exhibits an open park forest representing an 'African' savanna landscape. Significant inter- and intraslope allozymic differentiation was found in both organisms with generally higher polymorphism, heterozygosity, allele and gene diversity on the more variable and stressful upper station of the SF-slope, as expected by the niche-width variation hypothesis, and the environmental theory of genetic diversity. Solar radiation, temperature and aridity stresscaused interslope and intraslope differences on the SF-slope in genotypes and phenotypes of wild barley and the lichen at the Evolution Canyon microsite, as was the case for beetles, diplopods and earthworms tested at the site. Diversifying natural (microclimatic) selection appears to be the major evolutionary driving force causing interslope and SF-intraslope adaptative genetic divergence. Evolution Canyon proves an optimal model for unravelling evolution in action, across life and organizational levels.
机译：研究了170种野生大麦（Hordeum spontaneum）植物中28个推定基因座编码的蛋白质的同种异体多样性，以及下纳哈勒奥伦（Lower Nahal Oren）微型山（Mt.以色列卡梅尔非正式地指定了进化峡谷。从六个站点采集野生大麦样品：朝南的斜坡（SF坡）上的三个（上，中，下）和朝北的斜坡（NF坡）上的三个（下，中，上） 。从三个站点收集了金黄色葡萄球菌的样品：SF斜坡上的两个（中上部）和NF斜坡上的一个（上部）。 SF-上的太阳辐射高于NF-上的太阳辐射，使其更温暖，更干燥，时空更不均匀，气候更易起伏和压力更大。因此，它展示了代表“非洲”热带稀树草原景观的开放式公园森林。如生态位宽度变异假说和环境所预期的，在这两个生物中发现了明显的斜坡间和斜坡内同种异体分化，这两个生物通常具有较高的多态性，杂合性，等位基因和基因多样性，位于SF斜坡的可变性和压力较高的上位。遗传多样性理论。太阳辐射，温度和干旱胁迫导致进化大峡谷微地点的野生大麦和地衣的基因型和表型的SF坡的坡度和坡度差异，在该地点测试的甲虫，双足动物和earth就是这种情况。多样化的自然（微气候）选择似乎是导致坡间和SF坡间适应性遗传差异的主要进化驱动力。进化峡谷是揭示整个生命和组织层次上行动进化的最佳模型。

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