Abstract
Genetic resources are global assets of inestimable value to human kind, which holds the key to increasing food security. The loss of variation in crops due to the modernization of agriculture has been described as genetic erosion. The current status of the genetic diversity and erosion in spice crops is discussed in this chapter. Human intervention into the natural habitats of wild and related species in centers of diversity, diseases, and pests plays an important role in the loss of older species and varieties. This is further complicated by climate change and reproductive behavior of crop species. The Genetic erosion of cultivated diversity is reflected in a modernization bottleneck in the diversity levels that occurred during the history of the crop. Two stages in this bottleneck are recognized: the initial replacement of landraces by modern cultivars and further trends in diversity as a consequence of modern breeding practices. The factors contributing to erosion is due to the enormous diversity in cultivated plants, population growth, deforestation, erosion, changing land use, and climate factors are major threats to the existing biodiversity of the region. Urbanization is increasing and agriculture is changing from subsistence based on highly market-driven farming. Although these changes have increased incomes of the populations of wild habitants to certain extent, not all of them are for the good. In particular, biodiversity is declining as a result of some of these changes. It is mandate to conserve the vanishing plant genetic resources and to understand better the linkages between agricultural and economic system that affect diversity and sustainable production. Genetic erosion may occur at three levels of integration: crop, variety, and allele. Thus, genetic erosion is reflected in the reduction of allelic richness in conjunction with events at variety level. This requires immediate efforts to understand and implement the effective multiplication and conservation strategies using both conventional and modern technologies to save the loss of the valuable genetic resources and preserve them for posterity. An important aspect is also to include genetic resource conservation as an important part in our social life.
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Nirmal Babu, K. et al. (2015). Diversity and Erosion in Genetic Resources of Spices. In: Ahuja, M., Jain, S. (eds) Genetic Diversity and Erosion in Plants. Sustainable Development and Biodiversity, vol 7. Springer, Cham. https://doi.org/10.1007/978-3-319-25637-5_9
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