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Characterization of Reciprocal Hybrids of Common Ragweed, Ambrosia artemisiifolia, and Giant Ragweed, A. trifida

Published online by Cambridge University Press:  12 June 2017

Gilles Vincent
Affiliation:
Montreal Botanical Garden, 4101 est. Sherbrooke, Montreal, QC, Canada, H1X 2B2
Denis Lauzer
Affiliation:
Institut botanique, Univ. Montreal, 4101 est. Sherbrooke, Montreal, QC, Canada H1X 2B2
Mario Cappadocia
Affiliation:
Institut botanique, Univ. Montreal, 4101 est. Sherbrooke, Montreal, QC, Canada H1X 2B2

Abstract

Common ragweed (2n=36), giant ragweed (2n = 24), and their reciprocal F1 hybrids (2n = 30) were analyzed for a number of traits. Hybrids of the type giant ragweed♀ × common ragweed♂ were obtained via immature embryo culture. The analyses revealed a surprising contribution of the pollen parent for features such as biomass, leaf area, and specific leaf area. Leaf morphology, however, was similar to the maternal parent. One plant, originating from crosses of the type common ragweed♀ × giant ragweed♂, developed abnormally and cytological analysis revealed the presence of 24 chromosomes in its somatic cells. Probably this plant had an androgenetic origin.

Type
Weed Biology and Ecology
Copyright
Copyright © 1988 by the Weed Science Society of America 

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