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Crop diversity or crop biodiversity is the variety and variability of crops, plants used in agriculture, including their genetic and phenotypic characteristics. It is a subset of a specific element of agricultural biodiversity .
Genetic diversity is the basis of crop and livestock improvement programmes, which breed new varieties of crops and livestock in response to consumer demand and farmers' needs. An important source of genetic diversity are crop wild relatives , wild plant species that are genetically related to cultivated crops.
Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species. It ranges widely, from the number of species to differences within species , and can be correlated to the span of survival for a species. [ 1 ]
In the State of the World’s Plant Genetic Resources for Food and Agriculture (1998) the FAO defined Plant Genetic Resources for Food and Agriculture (PGRFA) as the diversity of genetic material contained in traditional varieties and modern cultivars as well as crop wild relatives and other wild plant species that can be used now or in the ...
A Vavilov Center (of Diversity) is a region of the world first indicated by Nikolai Vavilov to be an original center for the domestication of plants. [3] For crop plants, Nikolai Vavilov identified differing numbers of centers: three in 1924, five in 1926, six in 1929, seven in 1931, eight in 1935 and reduced to seven again in 1940. [4] [5]
An image of multiple chromosomes, taken from many cells. Plant genetics is the study of genes, genetic variation, and heredity specifically in plants. [1] [2] It is generally considered a field of biology and botany, but intersects frequently with many other life sciences and is strongly linked with the study of information systems.
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Crop diversity is the biological foundation of agriculture, and is the raw material plant breeders and farmers use to adapt crop varieties to pests and diseases.In the future, this crop diversity will play a central role in helping agriculture adjust to climate change and adapt to water and energy constraints.