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Character analysis and numerical classification in a wheat collection from Sicily

Merkmalsanalyse und numerische Klassifikation an einer Weizen-Kollektion aus Sizilien

Анализ признаков и ну мерическая классифи кация пшениц Сицилии

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Summary

A study was undertaken using 48 characters observed in plants, spikes and seeds in order to determine the amount of information of different characters and their taxonomic importance in tetraploid wheat samples from Sicily. A classification of the material was also attempted using similarity indices.

The most important characters appear: leaf pubescence, glume colour and length, and seed colour. Using all characters, similarity indices among samples were computed and a classification was worked out. This classification, which is very similar to those proposed by various scientists, produces hierarchical groups, showing different levels of merging, and offers very interesting hypotheses on the evolution of the Siciliandurum wheats.

Zusammenfassung

Untersucht wurden 48 Pflanzen-, Ähren- und Kornmerkmale an Proben tetraploider Weizen aus Sizilien, um den Informationsgehalt unterschiedlicher Merkmale und ihren taxonomischen Wert zu erfassen. Anhand von Ähnlichkeitsindices wurde auch eine Klassifikation des Materials vorgenommen.

Als bedeutsamste Merkmale erscheinen: Blattpubeszenz, Spelzenfarbe und-länge und Kornfarbe. Auf der Grundlage aller Merkmale wurden Ähnlichkeitsindices zwischen den Proben errechnet und eine Klassifikation ausgearbeitet. Diese ist den Klassifikationen anderer Wissenschaftler sehr ähnlich, ergibt hierarchische Gruppen mit unterschiedlichem Ähnlichkeitsniveau und ermöglicht die Aufstellung einer interessanten Hypothese zur Evolution der sizilianischendurum- Weizen.

Краткое содержание

Исследовались 48 призн аков растения, колоса и зерна на образцах тетраплоид ных пшениц Сицилии с цель ю выяснения их информ ационной и таксономической ценности. При помощи к оэффициентов сходст ва была предпринята и классификация мате риала.

Наиболее существенн ыми признаками оказа лись: опущённость листа, цв ет и длина плёнок, цвет зе рна. При учёте всех при знаков оценивались коэффиц иенты сходства между образ цами и строилась их классификация. Эта кл ассификация оказалась весьма схо дной с таковыми други х авторов, выявила иерархические групп ировки на различных у ровнях сходства и позволила выдвинуть интересну ю гипотезу эволюции с ицилианских твёрдых пшениц.

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Porceddu, E., Vannella, S. & Perrino, P. Character analysis and numerical classification in a wheat collection from Sicily. Die Kulturpflanze 29, 251–266 (1981). https://doi.org/10.1007/BF02014753

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