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Almost no inbreeding depression occurs in self-fertilizing plants because the mode of reproduction allows natural selection to take place in wild populations of such plants. Critical steps in the improvement of self-fertilizing crops are the choice of parents and the identification of the best plants in segregating generations.
Hybrid seeds planted by the farmer produce similar plants, but the seeds of the next generation from those hybrids will not consistently have the desired characteristics because of genetic assortment. It is therefore rarely desirable to save the seeds from hybrid plants to start the next crop.
Celebrity tomato is a first generation (F1) hybrid. [5] It was designed through the interbreeding of two pure tomato plants with desired characteristics such as disease resistance, high yields and good flavor. This was achieved by crossing inbred parent plants that were either pollen-carrying or seed-carrying. [10]
The "Better Boy" tomato variety is a hybrid between the Teddy Jones heirloom tomato variety and an unknown red variety developed by plant breeder John Peto. [1]Better Boy fruit grows from an indeterminate plant, growing to about 340 grams (12 oz) in weight, and typically ripens in around 72 days, growing to about 150 centimetres (5 ft) high. [2]
A genetically modified tomato, or transgenic tomato, is a tomato that has had its genes modified, using genetic engineering. The first trial genetically modified food was a tomato engineered to have a longer shelf life (the Flavr Savr ), which was on the market briefly beginning on May 21, 1994. [ 1 ]
To maintain a high-quality crop, some farmers purchase seeds every year. Typically, the seed company maintains two inbred varieties and crosses them into a hybrid strain that is then sold. Related plants like sorghum and gamma grass are able to perform apomixis, a form of asexual reproduction that keeps the plant's DNA intact. This trait is ...
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