The origin ofMentha X gracilis (Lamiaceae). I. Chromosome numbers,Fertility, and three morphological characters |
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| Authors: | Arthur O. Tucker David E. Fairbrothers |
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| Affiliation: | 1. Department of Agriculture and Natural Resources, Delaware State College, 19901–2275, Dover, DE
2. Department of Biological Sciences and Bureau of Biological Research, Rutgers—The State University, P.O. Box 1059, 08854–1059, Piscataway, NJ
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| Abstract: | Employing nine clones ofMentha arvensis and four clones ofM. spicata, 932 F, hybrids were synthesized and compared to 20 clones ofM. x gracilis. Two clones ofM. x gracilis with 60 somatic chromosomes were matched to a selected F1 hybrid. The other 18 clones ofM. x gracilis had somatic chromosome numbers of 60, 72, 84, and 96, and while these chromosome numbers appeared in the F1 progeny, morphological matches correlated with their correct chromosome numbers were not synthesized. The range of pollen and seed fertility, as well as the inheritance of male-sterility, leaf pubescence, and crispness, indicates that no one character can be used to identifyM. x gracilis, but all characters can be explained fromM. arvensis x M. spicata. |
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