Grass systematics

Gould, Frank W.; Shaw, Robert B.

doi:10.1007/bf02831478

Cited by 134 publications

(134 citation statements)

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“…Correl & Johnston (1970) afirmam que é abundante no Texas. Entretanto, por ser muito próxima de E. intermedia Hitchc., espécie comum no sul dos Estados Unidos e México, freqüentemente foi confundida com esta, conforme enfatizam Harvey (1975) e Gould & Shaw (1983). Isto deve ter motivado uma interpretação errônea quanto à sua abundância já que, segundo os últimos autores, é pouco comum no Texas.…”

Section: Resultsunclassified

Padrões de distribuição geográfica dos táxons brasileiros de Eragrostis (Poaceae, Chloridoideae)

Boechat¹,

Longhi-Wagner²

2000

Rev. bras. Bot.

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-(Patterns of geographic distribution of the Brazilian taxa of Eragrostis (Poaceae, Chloridoideae)). The genus Eragrostis presents 53 taxa in Brazil, being 38 of them native with distinctive patterns of geographic distribution: exclusively tropical, tropical/subtropical (more abundant in the tropical area but extending their occurrence to the Southern region), tropical and subtropical (as abundant in the tropical region as in the subtropical one), exclusively subtropical, and subtropical/tropical (opposed to the second pattern). An analysis of these patterns is presented together with representative maps.RESUMO -(Padrões de distribuição geográfica dos táxons brasileiros de Eragrostis (Poaceae, Chloridoideae)). O gênero Eragrostis está representado por 53 táxons no Brasil, 38 dos quais nativos e que podem ser reunidos nos seguintes padrões de distribuição geográfica: tropical, tropical/subtropical (táxons mais abundantes na área tropical mas que se estendem até a região sul), tropical e subtropical (tão abundantes na região tropical quanto na subtropical), subtropical, e subtropical/tropical (o oposto do segundo padrão). Uma análise destes padrões é apresentada juntamente com mapas representativos dos mesmos.

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Section: Resultsunclassified

Padrões de distribuição geográfica dos táxons brasileiros de Eragrostis (Poaceae, Chloridoideae)

Boechat¹,

Longhi-Wagner²

2000

Rev. bras. Bot.

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“…The F. rubra L. aggregate shows extensive hybridization, potentially resulting in observed natural polyploids (e.g. F. rubra rubra L. 6x = 42 or 8x = 56, F. rubra arctica L. 6x = 42, and F. rubra arenaria L 6x = 56) (Gould and Shaw 1983).…”

Section: Plant Materialsmentioning

confidence: 99%

Efficient analysis of ploidy levels in plant evolutionary ecology

et al. 2013

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Flow cytometry (FCM) has provided an efficient method to determine DNA content in cells, thus providing a feasible alternative to microscopy for the estimation of ploidy for population level studies requiring large sample sizes. In cytological studies, searching for example chromosomal abnormalities, samples are commonly treated in separate tubes to ensure the capture of sufficient number of separate cells to meet the required resolution (nuclei number > 5000 and coefficient variation (CV) < 5%). In this study, we tested whether FCM can be expedited by using 96-well plate-based FCM sample preparation and automated data analysis using Flowing Software without compromising the resolution required for ploidy level detection in population biology. We estimated ploidy levels in red fescue (Festuca rubra L.) and viviparous sheep's-fescue (F. vivipara Sm.) plants. A tube-based procedure gave more tightly defined peaks compared to a plate-based procedure. However, our results suggest that the plate-based higher throughput FCM procedure gives equally reliable estimation of the number of sets of chromosomes (ploidy) in plant with three times less reagent consumed and over 20 times more time-efficiently compared to the tube-based FCM procedure. We propose that the integration of plate-based FCM with Flowing Software provides a time-and cost-efficient and less error-prone procedure to determine ploidy levels in taxonomy, evolutionary ecology and plant breeding.

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“…Tribe Eragrostideae has been treated by many authors (e.g., Pilger 1956;Gould and Shaw 1983;Clayton and Renvoize 1986;Watson and Dallwitz 1992;Peterson et al 1995Peterson et al , 1997 in a broader sense than treated herein. We recognize two small subtribes, Cotteinae and Uniolinae, and one larger subtribe, Eragrostidinae.…”

Section: Eragrostideaementioning

confidence: 99%