Chromosome Numbers and Evolution in Anoda and Periptera (Malvaceae)

Bates, David M.

doi:10.5642/aliso.19871104.08

Cited by 6 publications

(6 citation statements)

References 6 publications

(14 reference statements)

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“…Anoda cristata is the most morphologically variable species within the Anoda genus (Bates, 1987), and seed weight is lower in most populations in the United States (Van Gessel et al ., 1998) compared with the present study in Argentina. However, within the study population, seed weight was a conservative trait and did not differ between cohorts and planting patterns.…”

Section: Discussionmentioning

confidence: 99%

Demography of Anoda cristata in wide‐ and narrow‐row soyabean

Puricelli¹,

Orioli²,

Sabbatini³

2002

Weed Research

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The annual weed Anoda cristata is recognized as a problem of increasing importance in soyabean crops. As seeds are the only source for the renewal of A. cristata populations, knowledge of its seedbank characteristics and seed production is useful in improving weed management decisions. There is a lack of information about the effect of the planting pattern of soyabean on weed population dynamics. The effects of 70-cm and 35-cm soyabean row spacings on A. cristata seedbank, seedling recruitment and mortality, plant biomass, seed production and seed shed were determined. Soyabean density was higher in 35-cm row spacings as an increase in planting rate in narrow-row soyabean is recommended for producers in Argentina. The different planting patterns modified A. cristata demography through changes in plant biomass and, subsequently, in seed production. Seedling emergence, plant mortality and the pattern and duration of seed shed were similar in both planting patterns and thus independent of crop spatial arrangement and density. Increments in A. cristata seedbank can be reduced by planting soyabean at narrower row spacings and by bringing forward soyabean harvest. The first practice reduces A. cristata biomass and consequently seed production, and the second practice decreases the amount of seeds contributing to the soil seedbank.

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Section: Discussionmentioning

confidence: 99%

Demography of Anoda cristata in wide‐ and narrow‐row soyabean

Puricelli¹,

Orioli²,

Sabbatini³

2002

Weed Research

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“…Only one alliance (Anoda) is monophyletic based on the ITS data. Anoda and Periptera were suggested to be closely related (Bates, 1987;Fryxell, 1997); both genera possess ephemeral mericarp walls (also found in Cristaria, to which they are not closely related) and are primarily distributed in Mexico. Periptera (only one species counted) has a haploid chromosome number of n ϭ 13, while Anoda is more chromosomally diverse with n ϭ 13, 14, 15, 18, 30, or 45 (Bates, 1987;Fryxell, 1997).…”

Section: Alliances and Genera Of Clade A-as Mentioned Cladementioning

confidence: 99%

“…Periptera (only one species counted) has a haploid chromosome number of n ϭ 13, while Anoda is more chromosomally diverse with n ϭ 13, 14, 15, 18, 30, or 45 (Bates, 1987;Fryxell, 1997). Interestingly, Bates (1987) noted that the only n ϭ 13 species of [Vol. 92 AMERICAN JOURNAL OF BOTANY Anoda (A. thurberi) forms a very robust hybrid (in greenhouse crosses) with Periptera punicea (n ϭ 13) and that these may represent a lineage derived within Anoda.…”

Section: Alliances and Genera Of Clade A-as Mentioned Cladementioning

confidence: 99%

Phylogenetic relationships within the tribe Malveae (Malvaceae, subfamily Malvoideae) as inferred from ITS sequence data

Tate

Aguilar

Wagstaff

et al. 2005

American J of Botany

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Phylogenetic relationships among genera of tribe Malveae (Malvaceae, subfamily Malvoideae) were reconstructed using sequences of the internal transcribed spacer (ITS) region of the 18S-26S nuclear ribosomal repeat. Newly generated sequences were combined with those available from previous generic level studies to assess the current circumscription of the tribe, monophyly of some of the larger genera, and character evolution within the tribe. The ITS data do not support monophyly of most generic alliances as presently defined, nor do the data support monophyly of several Malveae genera. Two main well-supported clades were recovered, which correspond primarily to taxa that either possess or lack involucral bracts, respectively. Chromosomal evolution has been dynamic in the tribe with haploid numbers varying from n = 5 to 36. Aneuploid reduction, hybridization, and/or polyploidization have been important evolutionary processes in this group.

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“…The New Mexico accession was most variable in terms of plant and leaf morphology. Spurred anoda is the most morphologically variable species within the Anoda genus (Bates 1987). Fryxell (1987) indicated that leaf morphology is characteristically very different within individuals of Anoda.…”

Section: Plant Morphologymentioning

confidence: 99%

Comparative growth and development of four spurred anoda (Anoda cristata) accessions

1998

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Field studies were conducted in Colorado and New Mexico to examine growth and development of spurred anoda accessions from Colorado, Mississippi, New Mexico, and North Carolina. Accessions were grown in a common garden in both locations. Leaf and stem weight ratios, leaf area ratio, and leaf area per plant were determined. North Carolina and Mississippi accessions were similar in morphology and appearance. Leaf shape, degree of pubescence, and coloration were different in the Colorado and New Mexico accessions. At both sites, the Colorado accession was taller and the canopy wider than other accessions. In Colorado in 1993, North Carolina and New Mexico accessions had the highest total weight followed by Colorado, then Mississippi. In 1994, final total weights of North Carolina, Mississippi, and New Mexico accessions were similar and greater than the Colorado accession. All accessions had similar final total weights in New Mexico in 1993. In 1994, Mississippi, North Carolina, and New Mexico accessions had similar total weights. The Colorado accession flowered earlier than other accessions. Seeds from Mississippi and North Carolina accessions grown in Colorado were heavier than the New Mexico or Colorado accession. This research demonstrates why making inferences of weed biology for variable species that occur over diverse geographic and climatic conditions is difficult and why regionally specific data are needed for variable species.

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Chromosome Numbers and Evolution in Anoda and Periptera (Malvaceae)

Cited by 6 publications

References 6 publications

Demography of Anoda cristata in wide‐ and narrow‐row soyabean

Demography of Anoda cristata in wide‐ and narrow‐row soyabean

Phylogenetic relationships within the tribe Malveae (Malvaceae, subfamily Malvoideae) as inferred from ITS sequence data

Comparative growth and development of four spurred anoda (Anoda cristata) accessions

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