Chromosome Numbers in Compositae
About: This article is published in Bulletin of the Torrey Botanical Club.The article was published on 1970-05-01. It has received 255 citations till now. The article focuses on the topics: Chromosome (genetic algorithm).
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344 citations
01 Jan 1989
TL;DR: The present treatment updates previous reviews and discusses the use of enzyme electrophoresis for addressing questions in plant systematics in light of the increasing emphasis on comparative studies of DNA.
Abstract: This chapter discusses the use of enzyme electrophoresis for addressing questions in plant systematics. The present treatment updates previous reviews (Gottlieb, 1977a, 1981a, 1982, 1983, 1984a, 1986; Crawford, 1983, 1985; Giannasi and Crawford, 1986) and also discusses: (1) the factors involved in the initial applications of enzyme electrophoresis to plant systematics; (2) the kinds of studies employing electrophoresis to be emphasized in the future; and (3) the future of enzyme electrophoresis in plant systematics in light of the increasing emphasis on comparative studies of DNA.
180 citations
01 Jan 1978
TL;DR: Reports of 150 original chromosome counts are recorded, including reports of 22 genera and 57 species and subspecific taxa in tribe Lactuceae, where x = 9 appears to be the ancestral base of the tribe.
Abstract: Reports of 150 original chromosome counts are recorded, including reports of 22 genera and 57 species and subspecific taxa in tribe Lactuceae. Also included are first reports for 12 specific or subspecific taxa. x = 9 appears to be the ancestral base of the tribe. Chromosome numbers are known for over 85% of the genera of the tribe and the frequency of polyploidy is ca. 23%, which is about one-half that of the angiosperms.
139 citations
TL;DR: The classical concept of the Asteroideae tribes has been confirmed in general, but recent investigations suggest numerous corrections, and some genera (e.g.Liabum, Echinops, Tarchonanthus, Arnica) do not fit into the scheme.
Abstract: Compositae (Asteraceae) are remarkably homogenous in basic type of inflorescence, flower and fruit. TheCichorioideae are more closely related to the other groups than usually realized. The classical concept of theAsteroideae tribes has been confirmed in general, but recent investigations (using palynology, carpology, phytochemistry etc.) suggest numerous corrections, and some genera (e.g.Liabum, Echinops, Tarchonanthus, Arnica) do not fit into the scheme. The tribes ofAsteroideae may be divided into two groups characterized by several common characters and common tendencies. The oldest reliable fossils are known from the borderline Oligocene/Miocene. Looking for the nearest relatives,Campanulales (incl.Calyceraceae) and—because of interesting phytochemical agreements—Araliales have to be discussed.
124 citations
TL;DR: Pappi of bristles or bristle-like subulate scales have arisen in various lineages of Heliantheae s.s.l. and in general have received too much weight in previous circumscriptions of suprageneric taxa, according to the phylogenetic data.
Abstract: Results of phylogenetic analyses of nuclear 18S–26S rDNA internal transcribed spacer (ITS) region sequences for representatives of most genera of helenioid Heliantheae and various members of Heliantheae s.s. (sensu stricto) and Eupatorieae help to clarify major lineages and relationships in the clade corresponding to Heliantheae s.l. (sensu lato) and Eupatorieae. Most subtribes of helenioid Heliantheae as circumscribed by Robinson (1981) correspond closely with ITS clades. Polygeneric subtribes of helenioid Heliantheae that appear to be monophyletic based on ITS data include Flaveriinae sensu Turner and Powell (1977), Madiinae sensu Carlquist (1959), and Peritylinae sensu Robinson (1981). Chaenactidinae sensu Robinson (1981) is polyphyletic, but most members of the group are encompassed within only four ITS clades. Based on the ITS data and results of combined analyses of ITS variation plus previously published morphological and chloroplast DNA data, we conclude that Heliantheae s.s. and Eupatori...
106 citations
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547 citations
Book•
01 Jan 1955
TL;DR: Vascular plants of the Pacific Northwest, Vascular plants in the Pacific NW, مرکز فناوری اطلاعات رسانی, کδا�رزی.
Abstract: Vascular plants of the Pacific Northwest , Vascular plants of the Pacific Northwest , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
487 citations