Parentalgeneration

Parentalgeneration (“parents generation”) is called both in the behavior research and in animal breeding biology and in the plant breeding the output's group of a line of descent.

The Parentalgeneration can consist of only two individuals (male and womanlike), in addition, of a larger group of individuals of different sex, who are kept common and as desired pairs of to be able itself.

The next generations (thus the direct descendants of the Parentalgeneration) branch generation one calls. , Even if the descendants of the descendants must be designated clearly, an index number is particularly then used as identification for the degree of relationship regarding the Parentalgeneration: the 1. Branch generation becomes then as <math> {F_1}< /math> - generation designates, the 2. Branch generation accordingly as <math> {F_2}< /math> - generation etc.

Are relevant these exact designations of the Verwandtschaftsverhältnisse for example, if (constructing on a Parentalgeneration of for example 15 male and 15 female house mice) a certain behavior or a physiological characteristic is to be optimized by regular breed choice and one liked to designate accurately, after like many generations the result desired of the breed were reached.

In similar way also the output individuals are called of crossings Parentalgeneration. Their descendants (thus the half-breeds 1. Degree) math <{>F_1 is called}< /math> - hybrid, the half-breeds 2. Degree (thus the descendants from the mating of <math> {F_1}< /math> - hybrids with <math> {F_1}< /math> - hybrid) math <{>F_2 is called}< /math> - hybrids.

In scientific publications the Parentalgeneration is shortened frequently with “P” and the subsequent generation without further specifying with”< math> {F_1}< /math> “.