Evidence for local outbreeding depression in the Mediterranean island endemic Anchusa crispa Viv. (Boraginaceae)
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چکیده
منابع مشابه
Inbreeding Depression under Drought Stress in the Rare Endemic Echium wildpretii (Boraginaceae) on Tenerife, Canary Islands
How climate-change induced environmental stress may alter the effects of inbreeding in patchy populations of rare species is poorly understood. We investigated the fitness of progeny from experimental self- and cross-pollinations in eight populations of different size of Echium wildpretii, a rare endemic plant of the arid subalpine zone of the Canarian island of Tenerife. As control treatments ...
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With its four species, Anchusa is one of the weedy genera of Boraginaceae in Iran. Its species are distributed in different habitats. In this study, the fruit morphological and micro-morphological features of the Anchusa taxa have been considered, so as to evaluate their diagnostic value. Eight qualitative and quantitative fruit features from 12 accessions of A. italica, A. strigosa, A. arvensi...
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Fragmentation of animal and plant populations typically leads to genetic erosion and increased probability of extirpation. Although these effects can usually be reversed by re-establishing gene flow between population fragments, managers sometimes fail to do so due to fears of outbreeding depression (OD). Rapid development of OD is due primarily to adaptive differentiation from selection or fix...
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Inbreeding with close relatives and outbreeding with members of distant populations can both result in deleterious shifts in the means of fitness-related characters, most likely for very different reasons. Such processes often occur simultaneously and have important implications for the evolution of mating systems, dispersal strategies, and speciation. They are also relevant to the design of br...
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The presented special communication summarizes data concerning novel caffeic acid-derived polyether from the species of two genera (Symphytum and Anchusa) of Boraginaceae family Symphytum asperum, S. caucasicum, S. officinale and Anchusa italica and structure elucidation of its main structural element. The high-molecular fractions were isolated from crude polysaccharides by ultrafiltration on m...
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ژورنال
عنوان ژورنال: Heredity
سال: 2001
ISSN: 0018-067X,1365-2540
DOI: 10.1046/j.1365-2540.2001.00897.x