1. bookVolume 70 (2021): Issue 1 (January 2021)
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Journal
eISSN
2509-8934
First Published
22 Feb 2016
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1 time per year
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English
access type Open Access

Identification of hybrid formulae of a few willows (Salix) using ovule numbers

Published Online: 30 Apr 2021
Page range: 75 - 83
Journal Details
License
Format
Journal
eISSN
2509-8934
First Published
22 Feb 2016
Publication timeframe
1 time per year
Languages
English
Abstract

Salix is a genus of considerable taxonomic complexity, and accurate identification of its species and hybrids is not always possible. Quantification of ovules was used in this study to verify the parentage of a few hybrids of Salix. It has been shown that ovule numbers in willow hybrids are the mean of the ovule numbers of their parents. The ovule index of a prostrate specimen of S. ×cottetii affirmed that this was a hybrid of S. myrsinifolia Salisb. and S. retusa L., and the ovule index of the ornamental cultivar ‘The Hague’ affirmed that this was a hybrid of S. caprea L. and S. gracilistyla Miq. Finally, we also examined a confusing group, previously identified in North America as S. pentandra. The ovule indexes and other morphological characters indicated that there were four taxa among the studied specimens: S. pentandra, S. ×meyeriana, S. serissima Fernald, and a hybrid of S. serissima and S. fragilis that has not previously been described. It was concluded that quantification of ovules in willows is a reliable tool that can be used in willow taxonomy, genetics and population studies.

Keywords

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