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Form 20-F

In the USA, the form required by the Securities and Exchange Commission for the filing of annual results by non-US companies.

genetic erosion

genetic erosion   Quick reference

A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

...erosion The loss of genetic information that occurs when highly adaptable cultivars are developed and threaten the survival of their more locally adapted ancestors, which form the genetic base of the crop. For example, a new hybrid strain of maize ( Zea mays ), developed largely by Donald F. Jones from a variety discovered in 1917 , had yields 25 per cent greater than standard maize. By the 1960s it was economically very favourable to use this single hybrid type, and more traditional varieties rapidly receded in distribution. The widespread adoption...

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