filial generation

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fil·i·al gen·er·a·tion (F),

the offspring of a genetically specified mating: first filial generation (symbol F1), the offspring of parents of contrasting genotypes; second filial generation (F2), the offspring of two F1 individuals; third filial generation (F3), fourth filial generation (F4), etc., the offspring in succeeding generations of continued inbreeding of F1 descendents.

fil·i·al gen·er·a·tion

(F) (fil'ē-ăl jen'ĕr-ā'shŭn)
The offspring of a genetically specified mating: first filial generation (symbol F1), the offspring of parents of contrasting genotypes; second filial generation (F2), the offspring of two F1 individuals; third filial generation (F3), fourth filial generation (F4), and so on; the offspring in succeeding generations of continued inbreeding of F1 descendents.
References in periodicals archive ?
However, it is unknown if such F1 hybrids are established in the field, primarily because subterranean termites have a cryptic nest and the soldier morphology is highly conserved within the group (Scheffrahn & Su 2005), preventing rapid detection and identification from field samples.
To identify differentially expressed genes in the susceptible pm2pm2 genotype (Chancellor), resistant Pm2Pm2 genotype (L031), and the resistant F1 hybrid (Pm2pm2) after inoculation with the Bgt isolate E09, leaf RNA samples of the three lines at two different time points (16 and 96 hpi) were prepared and sequenced using the Illumina sequencing platform.
In first and second seasons 18 and 15 F1 hybrids showed highly significant heterosis (Pless than 0.01) respectively.
ABSTRACT The growth characteristics and morphological features of the Atlantic bay scallop (Argopecten irradians irradians Lamarck), Chilean scallop (Argopecten purpuratus Lamarck), F1 hybrids of these species, and the offspring produced via 2 cycles of backcrossing between hybrid populations and the Atlantic bay scallop were examined to determine the feasibility of broadening the genetic basis of the bay scallop.
Seed saved from the first crosspollination of two unrelated open-pollinated plants is called F1 hybrid seed.
This creates a new variety known as an "F1 hybrid." To create F1 seed, seed companies grow two parent lines in the field each year, designate the male and female parents, carry out pollination under controlled conditions--such as hand-pollination under row cover--and then harvest seed from the females.
If you don't want to wait quite that long, buy one-year-old crowns to plant in early spring and go for an all male F1 hybrid as male plants tend to be more productive.
A lower survivorship in F1 hybrid individuals found in other hybrid zones could also be due to the incompatibility between mitochondrial and nuclear genomes, which seems to be greater between M.
4000 kg of F1 hybrid seed of these 5 combinations have been produced which will be planted during this year in different ecologies of cotton and its results will be available at the end of this year.
A There are several new F1 hybrid strawberries which come from seed and have pink or white flowers.
Only the seed companies can make more F1 hybrid seed--whose exact origins are usually trade secrets--so farmers have to buy more every year, instead of simply storing and planting their favorites for years, decades, or generations.
Good varieties include Red Drumhead, which produces solid, dark red heads, and Ruby Ball, an F1 hybrid you can cut in late summer.