Please register and log-in to create and edit pages

User Tools

    Please register and log-in to create and edit pages

Site Tools


Main Menu

Main menu
Click categories to expand


A-Z listingplugin-autotooltip__plain plugin-autotooltip_bigA-Z listing

This is an alphabetical index of all content pages.


Other categories

Utilities

Contacts
Register

Also see

Importance Ratings
News
Legal
Donate/Sponsor


Wikenigma supports:


Feeds etc
rss / xml feed
sitemap file
A-Z listing (archived)


Auto-Translate Site

Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown

Hybrid vigour

The question of why certain progeny of crosses or hybrids between unrelated individual plants and animals show greater vigor, productivity, disease resistance, viability and fertility, or Darwinian fitness as opposed to the progeny of close relatives has fascinated humans for millennia.

For reasons yet to be confirmed, genetic crosses between closely related plants, in order to produce hybrids, tend to result in offspring plants which are stronger in many respects than either of the two 'parent' plants.

The phenomenon has been termed heterosis - more commonly known to plant breeders and gardeners as 'hybrid vigour'.

There are two main competing theories which attempt to explain the phenomenon. The Dominance Hypothesis and the Overdominance Hypothesis (see paper below for details). More recently, there are suggestions that it may also have epigenetic (outside of the genes) components.

Despite countless numbers of studies on the manifestation of heterosis in diverse organisms gathered over decades, simple biological principles could remain elusive.

Quotes are from PLoS Biol 17(4): e3000215


    Share this page :

Dear reader : Do you have any suggestions for the site's content?

Ideas for new topics, and suggested additions / corrections for old ones, are always welcome.

If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !


Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.

( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)

Automatic Translation

You are currently viewing an auto-translated version of Wikenigma

Please be aware that no automatic translation engines are 100% accurate, and so the auto-translated content will very probably feature errors and omissions.

Nevertheless, Wikenigma hopes that the translated content will help to attract a wider global audience.

Show another (random) page

DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK OCTOBER 2021