Variation in nuclear DNA content across environmental gradients: a quantile regression analysis

Variation in nuclear DNA content across environmental gradients: a quantile regression analysis The nuclear DNA content of angiosperms varies by several orders of magnitude. Previous studies suggest that variation in 2C DNA content (i.e. the amount of DNA in G1 phase nuclei, also referred to as the 2C‐value) is correlated with environmental factors, but there are conflicting reports in the literature concerning the nature of these relationships. We examined variation in 2C DNA content for 401 species in the ecologically diverse California flora in relation to the mean July maximum temperature, January minimum temperature, and annual precipitation within the geographical ranges of these species. Species with small 2C‐values predominate in all environments. Species with large 2C‐values occur at intermediate July maximum temperatures, and decline in frequency at both extremes of the July temperature gradient, and with decreasing annual precipitation. Our analysis demonstrates the utility of quantile regression for statistical inference of complex distributions such as these. The method supports our observation that relationships between nuclear DNA content and environmental factors are stronger for species with large 2C‐values. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecology Letters Wiley

Variation in nuclear DNA content across environmental gradients: a quantile regression analysis

Ecology Letters, Volume 5 (1) – Jan 28, 2002

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Publisher
Wiley
Copyright
Copyright © 2002 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1461-023X
eISSN
1461-0248
DOI
10.1046/j.1461-0248.2002.00283.x
Publisher site
See Article on Publisher Site

Abstract

The nuclear DNA content of angiosperms varies by several orders of magnitude. Previous studies suggest that variation in 2C DNA content (i.e. the amount of DNA in G1 phase nuclei, also referred to as the 2C‐value) is correlated with environmental factors, but there are conflicting reports in the literature concerning the nature of these relationships. We examined variation in 2C DNA content for 401 species in the ecologically diverse California flora in relation to the mean July maximum temperature, January minimum temperature, and annual precipitation within the geographical ranges of these species. Species with small 2C‐values predominate in all environments. Species with large 2C‐values occur at intermediate July maximum temperatures, and decline in frequency at both extremes of the July temperature gradient, and with decreasing annual precipitation. Our analysis demonstrates the utility of quantile regression for statistical inference of complex distributions such as these. The method supports our observation that relationships between nuclear DNA content and environmental factors are stronger for species with large 2C‐values.

Journal

Ecology LettersWiley

Published: Jan 28, 2002

References

  • Variation in genome size and organization within hexaploid Festuca arundinaceae
    Ceccarelli, Ceccarelli; Falisfocco, Falisfocco; Cionini, Cionini
  • Relationships between nuclear DNA content and seed and leaf size in Soybean
    Chung, Chung; Lee, Lee; Arumuganathan, Arumuganathan; Graef, Graef; Specht, Specht
  • Predicting the distribution of shrub species in southern California from climate and terrain‐derived variables
    Franklin, Franklin
  • Quantile smoothing splines
    Koenker, Koenker; Ng, Ng; Portnoy, Portnoy
  • Genome size variation in Zea mays ssp. mays adapted to different altitudes
    Rayburn, Rayburn; Auger, Auger

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