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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 ...
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.
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 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 ...
A mule is a sterile hybrid of a male donkey and a female horse.Mules are smaller than horses but stronger than donkeys, making them useful as pack animals.. In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different varieties, subspecies, species or genera through sexual reproduction.
Hybrid seed is common in industrial agriculture and home gardening. It is one of the main contributors to the dramatic rise in agricultural output during the last half of the 20th century. [ 1 ] Alternatives to hybridization include open pollination and clonal propagation.
Gas-powered vehicles are still a great choice if you're trying to keep costs low. A mid-sized, gas-powered sedan will cost just over $1,000 more annually than the average cost of ownership of a ...
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.