Abstract
The improvement of crop plants has progressed from the time of domestication 10,000 to 14,000 years back. The harvesting-sowing-harvesting cycle over generations with selection pressure for yield and yield-related traits and quality have transformed the low-yielding shattering plants into present-day high-yielding cultivars. However, this process of selection in a definite direction toward grain or economic yield or in yield-related traits and quality has resulted in narrowing down of the genetic base of these crop species due to funneling toward a selected set of genes (Tanksley 1997). It has caused loss of genetic and allelic diversity for many other traits, particularly related with their potential to stand against various natural biotic and abiotic stresses, and for micro-nutritional quality. Consequent to this, often genetic diversity available in the cultivated species gene pool has been found limited for many stress factors and micro-nutritional factors.
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Singh, A.K. (2017). Introduction. In: Wild Relatives of Cultivated Plants in India . Springer, Singapore. https://doi.org/10.1007/978-981-10-5116-6_1
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