Pollen Flow and Optimal Outcrossing Distance

1983 ◽  
Vol 122 (1) ◽  
pp. 147-151 ◽  
Author(s):  
Keith D. Waddington
Keyword(s):  
Pollen Flow

TWO-GENERATION ANALYSIS OF POLLEN FLOW ACROSS A LANDSCAPE. I. MALE GAMETE HETEROGENEITY AMONG FEMALES

Evolution ◽  
2001 ◽  
Vol 55 (2) ◽  
pp. 260 ◽  
Author(s):  
Peter E. Smouse ◽  
Rodney J. Dyer ◽  
Robert D. Westfall ◽  
Victoria L. Sork
Keyword(s):  
Male Gamete ◽  
Pollen Flow

Pollen flow in distylous populations of Amsinckia (Boraginaceae)

1976 ◽  
Vol 54 (22) ◽  
pp. 2530-2535 ◽  
Author(s):  
Fred R. Ganders
Keyword(s):  
Pollen Flow ◽  
Progeny Testing ◽  
Self Incompatibility ◽  
Disassortative Mating ◽  
Pollen Loads ◽  
Self Pollination ◽  
Incompatibility System ◽  
Total Pollen

Stigmatic pollen loads were analyzed from naturally pollinated pin and thrum form flowers of Amsinckia douglasiana and A. vernicosa var. furcata. Pin stigmas captured more total pollen than thrum stigmas. Pins experienced either net self-pollination or random pollination. Thrum stigmas experienced significant disassortative pollination. Comparing pollen loads from intact and emasculated thrum flowers of A. douglasiana indicated that self-pollination and geitonogamy were relatively unimportant in the pollination of the thrum form. The level of disassortative pollination of A. vernicosa var. furcata does not appear to be high enough to account for the level of disassortative mating observed by progeny testing, suggesting that this species may possess an incomplete stylar self-incompatibility system such as has been reported in A. grandiflora.

GFP-tagged pollen to monitor pollen flow of transgenic plants

2001 ◽  
Vol 1 (4) ◽  
pp. 321-324 ◽  
Author(s):  
L. C. Hudson ◽  
D. Chamberlain ◽  
C. N. Stewart
Keyword(s):  
Transgenic Plants ◽  
Pollen Flow

scholarly journals Correlación morfo-específica en flores de Palicourea padifolia (Rubiaceae)

2017 ◽  
pp. 35 ◽  
Author(s):  
Angélica Hernández ◽  
Juan Francisco Ornelas
Keyword(s):  
Relative Position ◽  
Morphological Traits ◽  
Floral Morphology ◽  
Pollen Flow ◽  
Floral Traits ◽  
Selective Pressures ◽  
Corolla Length

Distyly is a floral polymorphism in which about half of the plants in a population have long styles and short stamens (Pin), whereas the remainder possess short styles and long stamens (Thrum). It has been suggested that the relative position of anthers and stigmas in distylous flowers enhances pollen flow between flowers of opposite morphs (legitimate pollination), in comparison to pollen flow between flowers of the same morph (illegitimate pollination). We studied the floral morphology of both floral morphs (six variables) in Palicourea padifolia (Rubiaceae) and found significant differences between floral morphs in floral traits that define the floral polymorphism. However, the correlations between morphological traits that define the floral morphs (morph-specific), and the significant correlations were stronger in the short styled morph. The morph-specific correlation patterns among some of the floral traits suggest differential selective pressures between floral morphs, regardless of corolla length.

VARIATION IN POLLEN FLOW WITHIN AND AMONG POPULATIONS OF IPOMOPSIS AGGREGATA

Evolution ◽  
1989 ◽  
Vol 43 (7) ◽  
pp. 1444-1455 ◽  
Author(s):  
Diane R. Campbell ◽  
Nickolas M. Waser
Keyword(s):  
Pollen Flow ◽  
Ipomopsis Aggregata

scholarly journals Two-generation analysis of pollen flow across a landscape. III. Impact of adult population structure

2001 ◽  
Vol 78 (3) ◽  
pp. 271-280 ◽  
Author(s):  
FRÉDÉRIC AUSTERLITZ ◽  
PETER E. SMOUSE
Keyword(s):  
Genetic Structure ◽  
Adult Population ◽  
Pollen Dispersal ◽  
Simple Relation ◽  
Physical Distance ◽  
Dispersal Distance ◽  
Analytical Theory ◽  
Pollen Flow ◽  
Estimation Errors ◽  
Spatially Distributed

The rate and distance of instantaneous pollen flow in a population are parameters of considerable current interest for plant population geneticists and conservation biologists. We have recently developed an estimator (Φft) of differentiation between the inferred pollen clouds that fertilize several females, sampled within a single population. We have shown that there is a simple relation between Φft and the average pollen dispersal distance (δ) for the case of a population with no geographic structure. Though forest trees usually show considerable pollen flow, assuming an absence of spatially distributed genetic structure is not always wise. Here, we develop analytical theory for the relation between Φft and δ, for the case where the probability of Identity by Descent (IBD) for two individuals decreases with the physical distance between them. This analytical theory allows us to provide an effective method for estimating pollen dispersal distance in a population with adult genetic structure. Using real examples, we show that estimation errors can be large if genetic structure is not taken into account, so it is wise to evaluate adult genetic structure simultaneously with estimation of Φft for the pollen clouds. We show that the results are only moderately affected by changes in the decay function, a result of some importance since no completely established theory is available for this function.

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