Botanica Pacifica

Research paper

Botanica Pacifica. A journal of plant science and conservation Preprint
Article first published online: 31 JAN 2019 | DOI: 10.17581/bp.2019.08105

Sex dimorphism in shoot morphology of Antennaria dioica (L.) Gaertner (Compositae)

Ksenia V. Dudova

Department of Geobotany, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia

Determination the sex of the plant shoots without using features of a separate capitulum is important in population-based studies. I tested hypothesis that Antennaria dioica has statistically significant differences in morphological traits between female and male shoots. Eight morphological features and 1907 shoots from the three geographically separated regions were studied. Reliable difference was found in height of generative shoots, rosette diameter and number of cauline leaves. However, the traits studied had significant overlap within individual populations and did not demonstrate significant differencces within a region. Therefore, none of the traits presented can be used to determine the sex of an individual.

Дудова К.В. Проявления полового диморфизма в морфологии побегов Antennaria dioica (L.) Gaertner (Compositae). В популяционных исследованиях двудомных растений актуально определение пола побегов без использования признаков генеративной сферы. Для Antennaria dioica проверена гипотеза о том, что по морфологическим признакам женские и мужские побеги этого вида значимо различаются. Для исследования полового диморфизма выбрано восемь признаков. Изучено 1907 побегов из трех географически удаленных регионов. Найдены достоверные различия между полами по признакам: высота генеративного прироста, диаметр прикорневой розетки и число листьев на генеративном приросте. При этом, по всем исследованным признакам выявлено значительное их перекрывание в рамках отдельных популяций и отсутствие значимых различий в рамках отдельных регионов. Поэтому ни один из представленных признаков не может быть использован для определения пола отдельной особи.

Keywords: dioecy, sex dimorphism, Antennaria dioica, morphological traits, двудомность, половой диморфизм, морфологические признаки



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