Hordeum vulgare

Barley. A crop that is as old as wheat, dating from about nine thousand years ago. It is salt-tolerant, and it often substituted for wheat, in ancient times, in soils that had become salty from inappropriate irrigation. However, it is little used in human nutrition today. The main use is for animal feed, and for malting to make beer. There is plenty of scope for developing horizontal resistance, and the crop is probably amenable to the use of male gametocides. Horizontal

In a plant epidemiological context, this term is entirely abstract, and it means that a gene-for-gene relationship is absent. Horizontal resistance and horizontal parasitic ability are both defined by the absence of a gene-for-gene relationship. A horizontal subsystem of a pathosystem is also defined by the absence of a gene-for-gene relationship.

See also: Horizontal parasitic ability, horizontal resistance, Horizontal pathotype, and Horizontal pathodeme. Horizontal parasitic ability

Parasitic ability that does not result from a gene-for-gene relationship. Horizontal parasitic ability is the parasitic ability of the Biometricians, and its inheritance is usually controlled by many polygenes. Although it has been very little studied, it seems always to vary quantitatively. It is the parasitic ability that enables a parasite to obtain nutrients from its host after the vertical resistance has been matched, and in spite of the horizontal resistance. (See also: vertical parasitic ability). Horizontal pathodeme

A population of a host in which all individuals have the same horizontal resistance. Many different cultivar with the same horizontal resistance, but with differing agronomic characteristics, all belong to the same horizontal pathodeme.

How To Get Rid Of Bed Bugs

How To Get Rid Of Bed Bugs

If you seriously want know how to get rid of bed bugs, then this may be the most important letter you'll ever read!... Discover How To Solve Your Dilemma In What You Thought To Be Your Dream Vacation And Easily Taking The First Step To Conquer The Bed Bugs Trauma You May Have At This Moment! It doesn't matter, if you have never have any ideas on how to getting rid of bed bugs and how to banish it quickly in the shortest time possible, then this golden guides will show you everything steps you need to take against bed bugs banishing!

Get My Free Ebook


Post a comment