Genetic Diversity and Outcrossing Rate between Undisturbed and Selectively Logged Forests of<i>Shorea curtisii</i>(Dipterocarpaceae) Using Microsatellite DNA Analysis

Obayashi, Kyoko; Tsumura, Yoshihiko; Ihara-Ujino, Tokuko; Niiyama, Kaoru; Tanaka, Hiroyuki; Suyama, Yoshihisa; Washitani, Izumi; Lee, Chai Ting; Lee, Soon Leon; Muhammad, Norwati

doi:10.1086/324549

Cited by 94 publications

(101 citation statements)

References 25 publications

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“…There is not a very strong mating advantage to neighboring plants. Indeed, we observed long-distance pollination within Obayashi et al (2002), that Sapelli is pollinated by mobile insects such as Apis and Trigona bees. Bee pollination would also be in agreement with the observed lack of directionality in pollen transfer.…”

Section: Analysis Of the Mating Systemmentioning

confidence: 84%

“…Lack of density effects on outcrossing rates is not universal in tropical trees. It has been observed in a number of species (Kitamura et al, 1994;Hall et al, 1996), while, in other cases, reduced densities result in higher selfing rates (Doligez and Joly, 1997;Dayanandan et al, 1999;Lee et al, 2000;Obayashi et al, 2002).…”

Section: Analysis Of the Mating Systemmentioning

confidence: 96%

“…In some species, lower densities not only result in selfing, higher inbreeding and genetic relatedness within progenies (e.g., Murawski and Hamrick, 1991, for nine species under natural conditions; Lee et al, 2000;Obayashi et al, 2002), but also lowered fecundity (Ghazoul et al, 1998;Cunningham, 2000). Other species seem to be largely unaffected by low population densities (e.g., Kitamura et al, 1994;Hall et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Such variation might be best explained by the behavior of the main pollinators and the type of incompatibility system. Species pollinated by low-mobility insects such as thrips and/or small beetles could then be opposed to species pollinated by long-distance pollinators such as Apis and Trigona bees (Obayashi et al, 2002). Whatever the pollinators, there is probably always a critical density of flowering trees in a forest below which pollination patterns are severely affected.…”

Section: Introductionmentioning

confidence: 99%

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Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum

et al. 2007

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In tropical forests, selective logging removes large trees that are often the main contributors to pollination. We studied pollination patterns of the African mahogany, Entandrophragma cylindricum (Sapelli). We investigated two plots in Cameroon corresponding to three tree densities: unlogged forest (Ndama 2002), a mildly logged forest 1 year after logging (Ndama 2003) and a severely logged forest 30 years after logging (Dimako). We used four microsatellite markers to perform paternity analysis. Selfing remained below 2% in all treatments. Pollen flow was mainly long distance but with some proximity effects. Average observed within-plot pollination distances were 338, 266 and 385 m, and pollination by trees outside the plots was 70% (Ndama 2002), 74% (Ndama 2003) and 66% (Dimako). Despite sampling a limited number of seeds from a limited number of mother trees, we obtained seeds sired by 35.6-38.3% of the potential within-plot pollen donors. While trees 20 cm in diameter contributed to pollination, results in Dimako suggest that individual larger trees contribute more to pollination than small ones. This effect was not detected in the other treatments. The results suggest extensive pollen flow in Sapelli. Hence, in Sapelli, the main limiting factor for regeneration after logging may be a reduction in the number of trees capable of producing seeds rather genetic effects due to limits to pollen dispersal.

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Section: Analysis Of the Mating Systemmentioning

confidence: 84%

Section: Analysis Of the Mating Systemmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum

et al. 2007

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“…The managers of tropical forests need to know critical limits for remnant tree densities in order to plan selective logging in a way that avoids reproductive isolation (Kanashiro et al, 2002), which may result in reduced seed production, lower genetic variation and increased inbreeding depression (Obayashi et al, 2002). In areas with forest fragmentation, studies on pollen and seed dispersal distances provide essential information on the level of isolation of remaining forest fragments Dick, 2001).…”

Section: Introductionmentioning

confidence: 99%

Limited pollen dispersal and biparental inbreeding in Symphonia globulifera in French Guiana

Деген

Bandou²,

Caron

2004

Heredity

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In this paper, we report a study of the mating system and gene flow of Symphonia globulifera, a hermaphroditic, mainly birdpollinated tree species with a large geographic distribution in the tropical Americas and Africa. Using three microsatellites, we analysed 534 seeds of 28 open pollinated families and 164 adults at the experimental site 'Paracou' in French Guiana. We observed, compared to other tropical tree species, relatively high values for the effective number of alleles. Significant spatial genetic structure was detected, with trees at distances up to 150 m more genetically similar than expected at random. We estimated parameters of the mating system and gene flow by using the mixed mating model and the TwoGener approach. The estimated multilocus outcrossing rate, t m , was 0.920. A significant level of biparental inbreeding and a high proportion of full-sibs were estimated for the 28 seed arrays. We estimated mean pollen dispersal distances between 27 and 53 m according to the dispersal models used. Although the adult population density of S. globulifera in Paracou was relatively high, the joint estimation of pollen dispersal and density of reproductive trees gave effective density estimates of 1.6 and 1.3 trees/ha. The parameters of the mating system and gene flow are discussed in the context of spatial genetic and demographic structures, flowering phenology and pollinator composition and behaviour.

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Population genetic structure of the endemic rosewoods Dalbergia cochinchinensis and D. oliveri at a regional scale reflects the Indochinese landscape and life‐history traits

Hartvig

Changtragoon

et al. 2017

Ecology and Evolution

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Indochina is a biodiversity hot spot and harbors a high number of endemic species, most of which are poorly studied. This study explores the genetic structure and reproductive system of the threatened endemic timber species Dalbergia cochinchinensis and Dalbergia oliveri using microsatellite data from populations across Indochina and relates it to landscape characteristics and life‐history traits. We found that the major water bodies in the region, Mekong and Tonle Sap, represented barriers to gene flow and that higher levels of genetic diversity were found in populations in the center of the distribution area, particularly in Cambodia. We suggest that this pattern is ancient, reflecting the demographic history of the species and possible location of refugia during earlier time periods with limited forest cover, which was supported by signs of old genetic bottlenecks. The D. oliveri populations had generally high levels of genetic diversity (mean H e = 0.73), but also strong genetic differentiation among populations (global GST = 0.13), while D. cochinchinensis had a moderate level of genetic diversity (mean H e = 0.55), and an even stronger level of differentiation (global GST = 0.25). These differences in genetic structure can be accounted for by a higher level of gene flow in D. oliveri due to a higher dispersal capacity, but also by the broader distribution area for D. oliveri, and the pioneer characteristics of D. cochinchinensis. This study represents the first detailed analysis of landscape genetics for tree species in Indochina, and the found patterns might be common for other species with similar ecology.

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Genetic Diversity and Outcrossing Rate between Undisturbed and Selectively Logged Forests ofShorea curtisii(Dipterocarpaceae) Using Microsatellite DNA Analysis

Cited by 94 publications

References 25 publications

Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum

Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum

Limited pollen dispersal and biparental inbreeding in Symphonia globulifera in French Guiana

Population genetic structure of the endemic rosewoods Dalbergia cochinchinensis and D. oliveri at a regional scale reflects the Indochinese landscape and life‐history traits

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