You are using an old browser that may not function as expected.
For a better, safer browsing experience, please upgrade your browser.

Log in Become a Member

Crossing direction

When crossing or breeding grape varieties, the parents are usually indicated in the form of "New variety = mother variety x father variety" (see a listing under New breeding). For example, "Müller-Thurgau = Riesling (mother) x Madeleine Royale (father)". This is also called the crossing direction. This is significant because much more cell material is passed on from the mother variety to the embryos in the seed, namely cell nucleus, plastids and mitochondria. From the father variety, on the other hand, only the cell nucleus is passed on (see also under flower).

Kreuzungsrichtung - Müller-Thurgau, Regent, Morio-Muskat, Zweigelt

The mitochondria are cell areas with energy-producing functions and their own DNA (genetic material). The chloroplasts belong to the plastid group. In contrast to the other plant parts, they have their own ribosomes (for the production of proteins) and, like mitochondria, also have their own DNA. This means that they can divide independently of the cell in which they live. Other plastids include amyloplasts (for storing starch), chromoplasts (for attracting insects to pass on pollen for pollination) and leucoplasts (for chemical defence against predators).

Voices of our members

Dr. Edgar Müller

I have great respect for the scope and quality of the wein.plus encyclopaedia. It is a unique place to go for crisp, sound information on terms from the world of wine.

Dr. Edgar Müller
Dozent, Önologe und Weinbauberater, Bad Kreuznach

The world's largest Lexicon of wine terms.

26,261 Keywords · 46,882 Synonyms · 5,322 Translations · 31,594 Pronunciations · 193,205 Cross-references
made with by our author Norbert F. J. Tischelmayer. About the Lexicon