Sporogenesis and Embryo Sac Development of Hesperocallis and Leucocrinum in Relation to Their Systematic Position

Cave, Marion S.

doi:10.2307/2437748

Cited by 20 publications

(17 citation statements)

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“…The length and centromeric position of chromosomes vanes gradually (JIN 1986), and the karyotype is completely different from that of Hosm, which is bimodal, possessing x = 30. The difference between Hemerocallis and Hosta is supported also by embryological observations (CAVE 1948).…”

Section: Hemerocallidaceaementioning

confidence: 57%

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A karyological review of the orders Asparagales and Liliales (Monocotyledonae)

Tamura

1995

Feddes Repertorium

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Karyology of the Asparagales and Liliales is reviewed with references to their morphology, embryology, DNA analyses, and other aspects. Asparagaceae, Ruscaceae, Dracenaceae, and Nolinaceae may share a common ancestor with x = 10, and Tecophilaeaceae, Cyanastraceae, and Ixioliriaceae with x = 12. Tricyrtis (Uvulariaceae) is karyologically similar to Tulipa, Gagea (Liliaceae) and Smilax (Smilacaceae); Clintonia (Uvulariaceae) to Medeola (Liliaceae); Prosartes and Streptopus (Uvulariaceae) to Calochortus (Calochortaceae); Scoliopus (Trilliaceae) to the Medeola‐Clintonia group or Calochortus‐Prosartes‐Streptopus group. The original chromosome size of the Asparagales and Liliales may be estimated as small.

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Section: Hemerocallidaceaementioning

confidence: 57%

“…However, the former includes only 18 short pairs, while the latter includes 24. Embryologically the genera are similar (CAVE 1948).…”

Section: Hostaceaementioning

confidence: 93%

A karyological review of the orders Asparagales and Liliales (Monocotyledonae)

Tamura

1995

Feddes Repertorium

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“…For many years Hosta was associated with Hemerocallis, Hesperocallis, and Leucocrinum (Krause, 1930;Hutchinson, 1934). Hesperocallis does resemble both Hosta and Yucca-Agave in embryological features and in having a bimodal karyotype, but Hemerocallis and Leucocrinum are very different in these features and probably not closely related to Hosta or to each other (Cave, 1948(Cave, , 1970.…”

Section: Discussionmentioning

confidence: 99%

Phylogeny of Agavaceae based on ITS rDNA sequence variation

Bogler

Simpson

1996

American J of Botany

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Several systems of classification have been proposed for the family Agavaceae. A distinctive bimodal karyotype and similarities of fruits and seeds strongly support close relationships among Yucca, Hesperaloe, Beschorneria, Furcraea, Agave, Manfreda, Polianthes, Prochnyanthes, and perhaps Hosta. However, Dasylirion, Beaucarnea, Nolina, Calibanus, Dracaena, and Sansevieria differ in so many cytological and morphological features that many have concluded they should be excluded from Agavaceae and separated into two families, Nolinaceae and Dracaenaceae. Chloroplast DNA restriction site data support these separations and indicate that Nolinaceae and Dracaenaceae are very close to Convallariaceae (Malanthemum, Convallaria, Aspidistra, Liriope, etc.). In this paper we report the results of an ITS rDNA sequencing study of 40 taxa in Agavaceae sensu lato and related groups in the order Asparagales. Sequence alignments were optimized using the Consistency Index, Retention Index, and Rescaled Consistency Index to find the alignment that exhibited the least amount of homoplasy. The results of our study are congruent with the conclusions drawn from cytological, immunological, cpDNA, and rbcL studies, which support a narrow interpretation of Agavaceae and a close relationship among Convallariaceae, Dracaenaceae, and Nolinaceae. In addition, the ITS sequence data provide evidence for some interesting relationships within these families.

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“…The chromosome number is n = 24, with 5-6 very large and 19-18 small chromosomes (Kubitzki 1998b ). Cave ( 1948Cave ( , 1970 discussed similarities between embryology and karyotypes of Hesperocallis and Agavaceae. In the past, the classification of Hesperocallis was generally uncertain.…”

Section: Early Diverging Members Of Agavaceaementioning

confidence: 99%

Phylogeny of Agavaceae Based on ndhF, rbcL, and its Sequences

Bogler¹,

Pires²,

Francisco‐Ortega³

2006

aliso

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Great advances have been made in our understanding of the phylogeny and classification of Agavaceae in the last 20 years. In older systems Agavaceae were paraphyletic due to overemphasis of ovary position or habit. Discovery of a unique bimodal karyotype in Agave and Yucca eventually led to a reexamination of concepts and relationships in all the lilioid monocots, which continues to the present day. Developments in cytogenetics, microscopy, phylogenetic systematics, and most recently DNA technology have led to remarkable new insights. Large-scale rbcL sequence studies placed Agavaceae with the core Asparagales and identified closely related taxa. Analysis of cpDNA restriction sites, rbcL, and ITS nrDNA sequences all supported removal of Dracaenaceae, Nolinaceae, and clarified relationships. Agavaceae s.s. presently consists of Agave, Beschorneria, Furcraea, Hesperaloe, Hesperoyucca, Manfreda, Polianthes, Prochnyanthes, and Yucca. In this paper we analyze recently obtained ndhF sequence data from Agavaceae and Asparagales and discuss the implications for classification. Parsimony analysis of ndhF data alone resolves most genera of Agavaceae and supports the inclusion of Camassia, Chlorogalum, Hesperocallis, and Hosta within Agavaceae s.l. Analysis of combined ndhF and rbcL data sets of selected Asparagales results in better resolution and stronger bootstrap support for many relationships. Combination of all available ndhF, rbcL, and ITS data in a single analysis results in the best resolution currently available for Agavaceae s.l. Implications for classification schemes past and present are discussed.

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Sporogenesis and Embryo Sac Development of Hesperocallis and Leucocrinum in Relation to Their Systematic Position

Cited by 20 publications

References 0 publications

A karyological review of the orders Asparagales and Liliales (Monocotyledonae)

A karyological review of the orders Asparagales and Liliales (Monocotyledonae)

Phylogeny of Agavaceae based on ITS rDNA sequence variation

Phylogeny of Agavaceae Based on ndhF, rbcL, and its Sequences

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