Mating patterns and demography in the tristylous daffodil Narcissus triandrus
نویسندگان
چکیده
منابع مشابه
Asymmetrical mating patterns and the evolution of biased style-morph ratios in a tristylous daffodil.
Non-random mating in plant populations can be influenced by numerous reproductive and demographic factors, including floral morphology and inter-plant distance. Here, we investigate patterns of outcrossed mating through male function in Narcissus triandrus, a tristylous, bee-pollinated wild daffodil from the Iberian Peninsula, to test pollen transfer models which predict that floral morphology ...
متن کاملPopulation structure and genetic diversity in tristylous Narcissus triandrus: insights from microsatellite and chloroplast DNA variation.
We investigated cpDNA sequence and nuclear microsatellite variation among populations of the wild daffodil Narcissus triandrus to examine the role of historical vs. contemporary forces in shaping population structure, morphological differentiation and sexual-system evolution. This wide-ranging heterostylous species of the Iberian Peninsula is largely composed of two allopatric varieties (vars. ...
متن کاملHerkogamy and mating patterns in the self-compatible daffodil Narcissus longispathus.
BACKGROUND AND AIMS Floral design in self-compatible plants can influence mating patterns. This study investigated Narcissus longispathus, a self-compatible bee-pollinated species with wide variation in anther-stigma separation (herkogamy), to determine the relationship between variation in this floral trait and the relative amounts of cross- and self-fertilization. METHODS Anther-stigma sepa...
متن کاملNatural selection on floral traits through male and female function in wild populations of the heterostylous daffodil Narcissus triandrus.
Measurements of natural selection in hermaphrodite populations require the analysis of performance through both female and male sex functions. Here, we investigate selection on three floral traits: flower number, flower length, and corona width through both sex functions in natural populations of the tristylous daffodil Narcissus triandrus. Selection through female function was examined in six ...
متن کاملGeographic variation in floral morphology and style-morph ratios in a sexually polymorphic daffodil.
Narcissus triandrus is a tristylous daffodil from the Iberian Peninsula that has striking geographical variation in floral morphology and style-morph ratios. Here, we investigate the relation between this variation and ecological factors to understand mechanisms governing morph ratios. We estimated morph ratios in 124 populations throughout the range of N. triandrus and measured 13 morphologica...
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ژورنال
عنوان ژورنال: Heredity
سال: 2006
ISSN: 0018-067X,1365-2540
DOI: 10.1038/sj.hdy.6800792