1991
DOI: 10.1002/j.1537-2197.1991.tb15214.x
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Evolution of Dioecy in Buchloe Dactyloides (Gramineae): Tests for Sex‐specific Vegetative Characters, Ecological Differences, and Sexual Niche‐partitioning

Abstract: Buchloe dactyloides is a perennial dioecious grass in which male and female inflorescences are so strikingly dimorphic that they were originally assigned to different genera. The objective of this paper is to present the results of tests for sex‐specific vegetative characters, ecological differences, and sexual niche‐partitioning, combining them with prior information on the reproductive biology of Buchloe for an evaluation of the key factors leading to the evolution of dioecy and sexual dimorphism. Field and … Show more

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Cited by 18 publications
(15 citation statements)
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“…In addition, all species of Bouteloua occur in areas, including deserts, characterized by relatively high temperatures and low precipitation (Columbus et al 1998). Plants that occur in harsh environments often display great variability in breeding systems and reproductive strategy (Quinn 1998), and Bouteloua illustrates this well.…”
Section: Spikelet Sexuality and Breeding System Shiftsmentioning
confidence: 98%
See 1 more Smart Citation
“…In addition, all species of Bouteloua occur in areas, including deserts, characterized by relatively high temperatures and low precipitation (Columbus et al 1998). Plants that occur in harsh environments often display great variability in breeding systems and reproductive strategy (Quinn 1998), and Bouteloua illustrates this well.…”
Section: Spikelet Sexuality and Breeding System Shiftsmentioning
confidence: 98%
“…For this mechanism to work in Bouteloua, self-incompatibility would have had to occur in the lineages leading to diclinous species. Monoecious plants of B. dactyloides have been found to be self-compatible (East 1940;Quinn 1991), but a comprehensive study and review of compatibility in Bouteloua are lacking and needed. Also, diploidy has been reported in B. chondrosioides, B. dactyloides, and B. multifida (Table 1), and many monoclinous species in the genus are polyploid (Gould 1980).…”
Section: Spikelet Sexuality and Breeding System Shiftsmentioning
confidence: 99%
“…Mitchell & Wittwer (1962) emphasized the significance of endogenous gibberellin levels in modifying the inherent floral sex ratio in cucumber. Quinn (1991) and Yin & Quinn (1994) hypothesized that in buffalograss (Buchloe dactyloides) mutations in a hermaphrodite (or monoecious) ancestor, greatly reducing gibberellin levels or its activity, and leading more or less simultaneously to shortened culms, contracted inflorescences and increased femaleness, thus initiating the evolution of dioecy in this species.…”
Section: Effects On Male and Female Functionmentioning
confidence: 99%
“…Genetic differentiation in reproduction has been frequently demonstrated among populations of a wide-ranging grass species (Hodgkinson and Quinn 1978;Quinn 1998). Early studies utilized the differential responses of genotypes to a common environment.…”
Section: Introductionmentioning
confidence: 99%
“…Early studies utilized the differential responses of genotypes to a common environment. Equally important in reproduction, however, is the role of genetically determined plasticity in the fine-tuning of phenology and biomass allocation in response to spatial and temporal fluctuations in the local environment (Quinn , 1998Quinn and Wetherington 2002). ''Phenotypic plasticity'' in this paper will refer to ''the amount by which the expressions of individual characteristics of a genotype are changed by different environments'' (Bradshaw 1965).…”
Section: Introductionmentioning
confidence: 99%