parental generation


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Related to parental generation: filial generation, First filial generation

generation

 [jen″er-a´shun]
1. the process of reproduction.
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart.
alternate generation reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation (direct generation) production of a new organism not originating from union of gametes.
first filial generation the first-generation offspring of two parents; symbol F1.
parental generation the generation with which a particular genetic study is begun; symbol P1.
second filial generation all of the offspring produced by two individuals of the first filial generation; symbol F2.
sexual generation production of a new organism from the cell formed by the union of a male gamete (spermatozoon) and a female gamete (oocyte).
spontaneous generation the discredited concept of continuous generation of living organisms from nonliving matter.

pa·ren·tal gen·er·a·tion (P1),

the parents of a mating, commonly experimental, involving contrasting genotypes; the original mating of a genetic experiment; parents of the F1 generation.

parental generation (P1)

[pəren′təl]
the initial cross between two varieties in a genetic sequence. The parents of any individual belonging to a first filial generation.

pa·ren·tal gen·er·a·tion

(P1) (pă-ren'tăl jen'ĕr-ā'shŭn)
The parents of a mating, commonly experimental, involving contrasting genotypes; the original mating of a genetic experiment; parents of the F1 generation.

parental generation (P)

the members of a cross between PURE BREEDING LINES, giving rise to offspring called the F1.

generation

1. the process of reproduction.
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart. Said also of antibiotics or other chemicals derived from parent compounds.

alternate generation
reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation
production of a new organism not originating from union of gametes. Called also direct generation.
direct generation
see asexual generation (above).
filial generation (first)
the first generation offspring of two parents; symbol F1.
filial generation (second)
all of the offspring produced by two individuals of the first filial generation; symbol F2.
generation interval
the mean age of the parents when the animals that are to replace them are born.
parental generation
the generation with which a particular genetic study is begun; symbol P1.
sexual generation
production of a new organism from the zygote formed by the union of gametes.
spontaneous generation
the discredited concept of continuous generation of living organisms from nonliving matter.
generation time
1. in epidemiological terms the time required between infection occurring and the patient reaching full infectivity.
2. in histological terms the time required to complete one full cell cycle; average of 20 hours for mammalian cells.
References in periodicals archive ?
1] generations than the parental generation, which is in conformity with earlier reports of Rohman et al.
In the parental generation, APM treatment did not significantly affect yield but in the [M.
Hence, the lower likelihood of youth attaining higher education may be reflected in the lower proportion of the parental generation in professional occupations (Rice 1999).
The disadvantage of Black youth is related to the possibility that the general inferior socioeconomic status of the parental generation has a long-lasting and transnational impact on Black youth's educational pathways.
Our results indicated that there was no significant effect in the first progeny generation on the survival rate (from larva to adult), when the parental generation under arrhenotoky conditions was exposed to 41[degrees]C for 12 h or less.
All values of these parameters were obtained from the study of the parental generation.
The S morph had a higher frequency in the offspring than in the parental generation in both trimorphic populations studied in 1991 (S2 and S3) but tended to decrease in these and in the four other populations observed in 1992 (including population S14, in which the S morph was the minority morph; [ILLUSTRATION FOR FIGURE 5 OMITTED]).
Significance of genotypic variance in lifetime fecundity on the parental generation and the F2 generation.
These conclusions are probably not affected by the small population sizes of each of the nine populations that comprised the parental generation (12 females and 3 to 12 males in each).
These results are not affected by a possible bias arising from sexual selection on the parental generation.
For the parental generation of the sib analysis, 500 of the field plants were randomly selected from the entire 1,550.
Plate fill orders and patterns can be defined using a simple graphical user interface, and child plates, with their eventual results traced back through parental generations.

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