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3 produkter
3 produkter
481 kr
Skickas inom 7-10 vardagar
This book was originally published in paperback in 1991, during a time of growing global concern over the loss of gene resources in crop plants. The future was seen as being dependent on their immediate conservation and effective use by plant breeders. The text is aimed at providing a comprehensive introduction to the form and availability of crop diversity, as well as how this diversity may be gathered, conserved and ultimately combined with new cultivars. Techniques are defined within the fields of data management, tissue culture and genetic engineering, and the overall concept of plant genetic resources is discussed within a political context. A comprehensive bibliography is included.
1 870 kr
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Advances in molecular and cell biology have led to the development of a whole range of techniques for manipulating genomes, collectively termed “biotechnology”. Although much of the focus in the plant sciences has been on the direct manipulation of plant genomes, biotechnology has also catalyzed a renewed emphasis on the importance of biological and genetic diversity and its conservation. The methods of biotechnology now permit a greater understanding of both species and genetic diversity in plants, the mechanisms by which that variation is generated in nature, and the significance of that variation in the adaptation of plants to their environment. They allow the development of rapid methods for screening germplasm for specific characters and promote more effective conservation strategies by defining the extent of genetic diversity. Tissue culture-based techniques are available for conserving germplasm that cannot be maintained by more traditional methods. Also sophisticated informatics systems enable information on plant genetics and molecular biology to be cross-related to systematic, ecological and other data through international networks.
2 452 kr
Skickas inom 7-10 vardagar
Crop wild relatives (CWR) are species closely related to crop plants which can contribute beneficial traits, such as pest or disease resistance and yield improvement. These species are critical for improving agricultural production and increasing food security. They are also essential components of natural and semi-natural habitats as well as agricultural systems, and are therefore vital in maintaining ecosystem health. However, CWR, like any other group of wild species, are subject to an increasing range of threats: habitat loss, degradation and mismanagement, over-collection and climate change. Through an examination of the national, regional and global context of CWR, these authoritative studies present methodologies and case studies that review and provide recommendations for global conservation and use. Topics range from the establishment of conservation priorities and strategies, threat assessment and genetic erosion and pollution.