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F1 hybrid (also known as filial 1 hybrid) is the first filial generation of offspring of distinctly different parental types. [1] F1 hybrids are used in genetics, and in selective breeding, where the term F1 crossbreed may be used. The term is sometimes written with a subscript, as F 1 hybrid. [2] [3] Subsequent generations are called F 2, F 3 ...
The Early Girl tomato is a medium-sized globe-type F1 hybrid popular with home gardeners because of its early ripening fruit. Early Girl is a cultivar of tomato with indeterminate growth, which means it produces flowers and fruit until it is killed by frost or another external factor (contrast with a determinate cultivar, which would grow to a limited, predefined shape and be most productive ...
Open-pollinated varieties are also often referred to as standard varieties or, when the seeds have been saved across generations or across several decades, heirloom varieties. [2] While heirlooms are usually open-pollinated, open-pollinated seeds are not necessarily heirlooms; open-pollinated varieties are still being developed.
A common alternative to growing hybrid plants is to grow heirloom or open pollinated plants which, unlike F1 hybrids, will produce viable seed with progeny similar to its parent. [78] Many modern gardeners will save seeds from heirloom varieties but not hybrids due to the certainty of desirable traits heirloom seeds provide.
A medium-sized hybrid sedan has an annual cost of ownership of just $9,476, according to data from AAA, which works out to be a cost-per-mile of just $0.63. Even if you opt for a hybrid SUV, you ...
Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents.
The terminology around a cultivar also includes terms such as heirloom, open-pollinated, self-pollinating, and hybrid. [9] Heirloom varieties are typically those that have been selected and grown historically with seeds saved every year, and are still maintained today in similar fashion, such as the blocky-type California Wonder.
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