GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||||
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17:37 Mar 10, 2010 |
German to English translations [PRO] Science - Genetics | |||||||
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| Selected response from: Gillian Scheibelein Germany Local time: 15:13 | ||||||
Grading comment
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Summary of answers provided | ||||
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4 +5 | wide crosses |
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Summary of reference entries provided | |||
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wide crosses Explanation: see http://en.wikipedia.org/wiki/Plant_breeding When distantly related species are crossed, plant breeders make use of a number of plant tissue culture techniques to produce progeny from otherwise fruitless mating. Interspecific and intergeneric hybrids are produced from a cross of related species or genera that do not normally sexually reproduce with each other. These crosses are referred to as Wide crosses. For example, the cereal triticale is a wheat and rye hybrid. The cells in the plants derived from the first generation created from the cross contained an uneven number of chromosomes and as result was sterile. The cell division inhibitor colchicine was used to double the number of chromosomes in the cell and thus allow the production of a fertile line. -------------------------------------------------- Note added at 16 mins (2010-03-10 17:53:39 GMT) -------------------------------------------------- For the German term, see: http://www.biosicherheit.de/de/debatte/555.doku.html Epigenetische Effekte sind natürlich vorkommende Mechanismen. Pflanzenzüchter nutzen sie - bewusst oder unbewusst - bei so genannten "weiten Kreuzungen": Nachkommen von Pflanzen aus möglichst weit voneinander entfernten Genpools liegen in ihrer Merkmalsausprägung, z.B. der Biomassebildung, deutlich über dem Mittel beider Eltern (Heterosiseffekt Reference: http://en.wikipedia.org/wiki/Plant_breeding |
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Grading comment
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