The progeny derived after crossing two genotypes as male and female
parents; such populations include F2 genotypes generated from F1 progeny, lines generated
after doubling the haploids (DHs, obtained from F1 plants through anther, egg cell
or ovule culture or distant hybridization), or recombinant inbred lines (RILs), which are
derived by single seed descent for at least five or more generations by repeated selfing or
sibling mating gene meth >>> Figure 51