Mating patterns and pollen dispersal in a natural knobcone pine (Pinus attenuata Lemmon.) stand

Comparison of pollen gene flow among four European beech (Fagus sylvatica L.) populations characterized by different management regimes

“…A binomial (successful pollinations versus unsuccessful pollinations of each male-female pair) distribution of errors was assumed. The independent variables were the distance, the angle (calculated as described by Burczyk et al, 1996) and the Figure 2 Estimates of pollen-mediated gene flow from outside the four study plots. The black bars represent estimates obtained by maximum likelihood paternity analysis using FaMoz, and the grey bars represent estimates (and their s.e.s) from the mating model paternity analysis performed using NM+.…”

Male reproductive success in Pseudotsuga menziesii (Mirb.) Franco: the effects of spatial structure and flowering characteristics

“…Patterns of pollen dispersal, gene flow between populations and differential reproductive success influence the levels of inbreeding, as well as effective population size and distribution of genetic diversity between and within populations. In addition to their importance to population genetics theory, mating patterns are also of great practical value in agriculture and forestry (Adams & Birkes, 1991;Snow & Lewis, 1993 species and it is expected that several factors, including distance, fecundity and flowering phenology, may affect individual reproductive success and patterns of pollen dispersal (Broyles & Wyatt, 1991;Adams et aL, 1992b;Devlin et a!., 1992;Snow & Lewis, 1993;Burczyk et a!., 1996). For theoretical and practical reasons it is important to identify these factors and the best way to achieve this is the application of genetic estimation techniques using selectively neutral genetic markers (Smouse & Meagher, 1994).…”

“…Adams & Birkes (1989, 1991 proposed the neighbourhood model, which takes into account the possibility of mating with distant males located outside a local population, and is particularly useful for predominantly outcrossing, especially wind-pollinated species. Additionally, the neighbourhood model allows individual male reproductive success to be related to various factors that may influence it (Burczyk et al, 1996).Seed orchards are artificial forest tree populations established to promote the production of genetically improved seeds used for reforestation purposes and they are important for breeding programs of several conifers. In order to attain expected genetic gains, several assumptions about mating patterns must be met.…”

“…It is assumed that the mating success of each outcross male in the neighbourhood (çb) follows an exponential relationship (Adams & Birkes, 1991;Burczyk et al, 1996). In this study we related male mating success to four factors:where d, f and Pi indicate distance (m) from the mother tree, fecundity and phenology scores (see below), respectively, and cos (to-ç,) is the angle cosine between the presumed prevailing direction of effective pollen dispersal and the location of the jth male within a neighbourhood (Burczyk et a!., 1996).The parameters /3, y, tp and (5 are the estimated parameters that describe the effects of the respective factors.Mating system parameters included in various models were estimated by fitting the models to multilocus pol len gametic arrays in the offspring of individual mother trees using maximum likelihood (ML) methods (Rao, 1973;Roeder et a!., 1989). This was carried out using the NEIGHBOR computer Given estimates of the mating system parameters, fertilities of individual males within a neighbourhood () can be obtained from eqn (2) (Burczyk et al, 1996).…”

Estimating the Parameters of Pollen Flow and Mating System in Pinus densiflora Population in Buan, South Korea, Using Microsatellite Markers

“…직접추정방법은 종자의 화분수를 구별하여 화분분포 곡선(pollen dispersal curve)을 추정하고 화분 이주의 비율을 계산할 수 있는 장점이 있으나 (Burczyk et al, 1996) …”