Morphological characteristics of the interspecific F1 hybrids Nicotiana tabacum L. x Nicotiana africana MERXM
2008
Doroszewska, T.
This paper describes results of the interspecific F1 hybrids obtained as a results of crossing five tobacco cultivars with wild species N. africana having a resistance to Potato virus Y. The inviability of the interspecific F1 hybrids was overcome using cotyledon culture. The viably hybrids were compared with their parents for growth rate, plant morphology and duration of development. The F1 hybrids grew much faster than N. africana and at a rate similar to that of the tabacum parents. The F1 hybrids produced fewer leaves that their respective parental forms. The hybrid plants were taller than either parent. All hybrid combinations produced bottom and middle leaves, which were intermediate in size relative to their parents, whereas the upper leaves were larger in the hybrids than in either parent
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