منابع مشابه
The Ecogeography of Andean Potatoes
Adaptation to varied habitats confers ecological versatility and the capacity for coarse-grained distribution across heterogeneous habitats, whereas ecological specialization implies a restricted pattern. Ecogeography and adaptive trairs help to determine whether farmers are able to adjust their diverse erops to socioeeonomie and environmental changes (a process known as in situ conservation) o...
متن کاملThe Ecogeography of Andean Potatoes
Adaptation to varied habitats confers ecological versatility and the capacity for coarse-grained distribution across heterogeneous habitats, whereas ecological specialization implies a restricted pattern. Ecogeography and adaptive trairs help to determine whether farmers are able to adjust their diverse erops to socioeeonomie and environmental changes (a process known as in situ conservation) o...
متن کاملNuclear and chloroplast DNA differentiation in Andean potatoes.
Over 3500 accessions of Andean landraces have been known in potato, classified into 7 cultivated species ranging from 2x to 5x (Hawkes 1990). Chloroplast DNA (ctDNA), distinguished into T, W, C, S, and A types, showed extensive overlaps in their frequencies among cultivated species and between cultivated and putative ancestral wild species. In this study, 76 accessions of cultivated and 19 acce...
متن کاملEcogeography of teosinte
Adaptation of crops to climate change has motivated an increasing interest in the potential value of novel traits from wild species; maize wild relatives, the teosintes, harbor traits that may be useful to maize breeding. To study the ecogeographic distribution of teosinte we constructed a robust database of 2363 teosinte occurrences from published sources for the period 1842-2016. A geographic...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
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ژورنال
عنوان ژورنال: BioScience
سال: 1998
ISSN: 0006-3568,1525-3244
DOI: 10.2307/1313242