منابع مشابه
Cenozoic insect-plant diversification in the tropics.
E volution has done wonders with mass extinctions. Organic diversity has rebuilt itself at least five times during the history of life on Earth, fashioning novelty from the organic remnants of each catastrophe (1). Modern biodiversity arose from a global extinction event at the end of the Cretaceous period (the ‘‘K-T’’ extinction) that probably was caused by an asteroid or comet impact. This pe...
متن کاملSoil-plant Relationships in the Tropics
As commonly defined, the tropics comprise that region of the earth lying between the Tropics of Cancer and Capricorn, constituting 38% of the larid surface (5 x 109 ha). The tropics may also be defined as those areas with mean temperatures greater than 18'C in all mor.ths of th. year. A third definition of the tropics specifies those areas with soils in which the tempera ture at a depth of 50 ...
متن کاملApplication of DNA Molecular Markers in Plant Breeding (Review article)
Plant Breeding has utilized a wide range of techniques and methods to improve the quality and quantity of plants. The molecular markers are the tools that have provided a new perspective for plant breeding advancements. This article has reviewed the various advantages and uses of molecular markers and the utilization of the high potential of natural polymorphisms within communities, combined wi...
متن کاملThe Future of Plant Breeding
A symposium was hosted 10 to 11 Mar. 2005 at Michigan State University to discuss the future of plant breeding education at public institutions. Plant breeding remains a vibrant, multidisciplinary science characterized by its ability to reinvent itself by absorbing and utilizing novel scientific findings and technical approaches. A contemporary breeding curriculum should include hands-on experi...
متن کاملPlant-soil interactions in multistrata agroforestry in the humid tropics
Multistrata agroforestry systems with tree crops comprise a variety of land use systems ranging from plantations of coffee, cacao or tea with shade trees to highly diversified homegardens and multi-storey tree gardens. Research on plant-soil interactions has concentrated on the former. Tree crop-based land use systems are more efficient in maintaining soil fertility than annual cropping systems...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1906
ISSN: 0006-8071
DOI: 10.1086/328848