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<blockquote data-quote="hanadr" data-source="post: 322605" data-attributes="member: 8110"><p>Why would an F1 hybrid be sterile?</p><p> F1 simply means first generation. F1 hybrids tend to be highly productive and predictable. F2s are less so. It's all just back to Mendelian genetics. All the F1 peas produced by crossing the parental short growing peas with the parental tall peas are tall. cossing F1s produces variety. Thus the F2 of F1 tall, red flowered peas produces the well-known 9:3:3:1 ratio of the 4 possible results ie, tall red. short red, tall white and short white. Nevertheless all are still PEAS</p><p> Incidentally it's not correct that hybrids between species are always sterile. Many years ago Scientific American published a study on mules. Mules are hybrids of 2 closely related species, the horse and the donkey. F1 is a mule. It was found that amny mules are fertile [contrary to popular belief] and F2 crosses could be like pure-bred donkeys, pure bred horses or mules. </p><p> in crop plants, the hybrids are between 2 pure breeding varieties of the SAME SPECIES.</p><p> Hana</p><p> PS sorry to be picky about science</p><p> Istill think we are not meant to eat a lot of wheat, of whatever kind, but It doesn't help to confuse a species with a variety.</p></blockquote><p></p>
[QUOTE="hanadr, post: 322605, member: 8110"] Why would an F1 hybrid be sterile? F1 simply means first generation. F1 hybrids tend to be highly productive and predictable. F2s are less so. It's all just back to Mendelian genetics. All the F1 peas produced by crossing the parental short growing peas with the parental tall peas are tall. cossing F1s produces variety. Thus the F2 of F1 tall, red flowered peas produces the well-known 9:3:3:1 ratio of the 4 possible results ie, tall red. short red, tall white and short white. Nevertheless all are still PEAS Incidentally it's not correct that hybrids between species are always sterile. Many years ago Scientific American published a study on mules. Mules are hybrids of 2 closely related species, the horse and the donkey. F1 is a mule. It was found that amny mules are fertile [contrary to popular belief] and F2 crosses could be like pure-bred donkeys, pure bred horses or mules. in crop plants, the hybrids are between 2 pure breeding varieties of the SAME SPECIES. Hana PS sorry to be picky about science Istill think we are not meant to eat a lot of wheat, of whatever kind, but It doesn't help to confuse a species with a variety. [/QUOTE]
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