F2 hybrid

F2 hybrid [ Genetics ]
Abbreviation: F2

Dictionary of botanic terminology - index of names

The second filial (= F2 ) generation of offspring obtained when F1-Hybrids (first-cross individuals) are crossed randomly among themselves.

This is the product obtained by self-fertilization or crossing inter se of two interbreeding offspring of the first filial generation F1. The progeny within an F2 generation will be more variable phenotypically than the F1. The characteristics of individual vary greatly, offspring unlike themselves

In F2 hybrid it is noticeable the happening of inbreeding depression ( compare whit: hybrid vigour ) which is the phenomenon that happens when plants self-pollinate and homozygosity increases. The more a species is inbred (i.e., the more self-pollinated), the more genes at which the pairs of alleles are the same. Self-pollination or inbreeding leads to an increase in homozygosity, and a decrease in heterozygosity. This usually leads to a loss of vigour.

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