Genetic Structure, Mating System, and Long-Distance Gene Flow in Heart of Palm (Euterpe edulis Mart.)

Gaiotto, Fernanda Amato; Grattapaglia, Dário; Vencovsky, Roland

doi:10.1093/jhered/esg087

Cited by 118 publications

(163 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, studying two populations of the Atlantic Forest palm Euterpe edulis, GAIOTTO et al (2003) found an average H e over 18 microsatellite loci of 0.86, a result higher than that found in the current study. O. phalerata has high genetic diversity which is likely due to a high outcrossing rate combined with the occurrence of protogyny, extensive pollen flow among populations via beetles and wind (ANDERSON and BALICK, 1988), as well as the high density of palms per hectare (on average 453.3 trees ha -1 ).…”

Section: Genetic Diversitycontrasting

confidence: 99%

See 1 more Smart Citation

Genetic diversity and spatial genetic structure in populations of Orbignya phalerata Mart. under different exploitation intensities in the Brazilian savanna

et al. 2015

View full text Add to dashboard Cite

Genetic studies in tropical tree species have found signs of decreased genetic diversity and increased levels of inbreeding and spatial genetic structure (SGS) in fragmented and exploited populations. The aim of this paper was to investigate genetic diversity, structure, and intrapopulation SGS using eight microsatellite loci for three Orbignya phalerata populations that have undergone different intensities of seed harvesting. From each population, we georeferenced and sampled 30 seedlings, 30 juveniles, and 30 adult trees. The total number of alleles over all loci (k), and observed (H o ) and expected heterozygosity (H e ) presented lower values for the population experiencing more intense fruit harvesting than less heavily exploited populations, suggesting that fruit harvesting may decrease genetic diversity. Null alleles were detected in practically all loci among seedlings, juveniles, and adults in all populations, indicating that the estimates of H o , H e , and fixation index (F) are biased. When corrected for null alleles (F Null ), the fixation index decreased for all samples, resulting in significantly higher than zero results for seedlings of all populations, but not for juveniles and adults of all populations. The comparison of F Null values between cohorts in the most heavily exploited population (ESP) suggests that inbred individuals are eliminated between seedling and adult stages. Significant SGS was detected up to 60 m in all populations, which indicates short distance seed dispersal. Genetic differentiation (G' ST ) between pairwise populations was related to spatial distance between populations, with the greatest difference between more distant populations.

show abstract

Section: Genetic Diversitycontrasting

confidence: 99%

“…Selection between seed, seedling, and juvenile to adult stage in tree species is well documented. For example, in Astrocaryum mexicanum (EGUIARTE et al, 1992), E. edulis (GAIOTTO et al, 2003), and Copaifera langsdorffii (SEBBENN et al, 2011), higher levels of inbreeding were found in seeds and juveniles than in adults.…”

Section: Genetic Diversitymentioning

confidence: 99%

Genetic diversity and spatial genetic structure in populations of Orbignya phalerata Mart. under different exploitation intensities in the Brazilian savanna

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The pollen immigration from outside the sampled farm may represent a contribution of pollen and seeds for 63.16% of seedlings sampled, suggesting long distance gene flow of pollen and/or seeds. The observed long distance pollen dispersal found in this study agrees with the observations in other species of tropical trees of low population density, thereby suggesting that the average distance of pollen dispersal is generally greater than 200 m (Nason and Hamrick, 1997;White et al, 2002;Gaiotto et al, 2003;Dick et al, 2003;Carneiro et al, 2007;Cloutier et al, 2007;Eduardo et al, 2008). The agroforestry system to which the population of C. legalis is found most likely favors the action of pollen and seed dispersers.…”

Section: Discussionsupporting

confidence: 88%

Effect of selective logging on genetic diversity and gene flow in Cariniana legalis sampled from a cacao agroforestry system

Leal¹,

Santos²,

Gaiotto³

2014

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT. The fragments of the Atlantic Forest of southern Bahia have a long history of intense logging and selective cutting. Some tree species, such as jequitibá rosa (Cariniana legalis), have experienced a reduction in their populations with respect to both area and density. To evaluate the possible effects of selective logging on genetic diversity, gene flow, and spatial genetic structure, 51 C. legalis individuals were sampled, representing the total remaining population from the cacao agroforestry system. A total of 120 alleles were observed from the 11 microsatellite loci analyzed. The average observed heterozygosity (0.486) was less than the expected heterozygosity (0.721), indicating a loss of genetic diversity in this population. A high fixation index (F IS = 0.325) was found, which is possibly due to a reduction in population size, resulting in increased mating among relatives. The maximum (1055 m) and minimum (0.095 m) distances traveled by pollen or seeds were inferred based on paternity tests. We found 36.84% of unique parents among all sampled seedlings. The progenitors of the remaining seedlings (63.16%) were most likely out of the sampled area. Positive and significant spatial genetic structure was identified in this 627 ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 13 (1): 626-635 (2014) Effect of logging on genetic diversity of Cariniana legalis population among classes 10 to 30 m away with an average coancestry coefficient between pairs of individuals of 0.12. These results suggest that the agroforestry system of cacao cultivation is contributing to maintaining levels of diversity and gene flow in the studied population, thus minimizing the effects of selective logging.

show abstract

“…A magnitude da correlação entre o PIC e o número de alelos também foi alta e significativa (r=0,78, P 0,04), existindo uma relação direta entre eles, ou seja, quanto maior no número de alelos, maior será o valor do PIC. Elevados níveis de polimorfismos também foram detectados por Gaiotto et al (2003) e Conte et al (2006) ao utilizarem os mesmos primers em populações de palmiteiro (Euterpe edulis). Germoplasma de outras palmeiras também apresentam alta diversidade quando analisados com marcadores microssatélites (Perera et al, 2000(Perera et al, , 2001Meerow et al, 2003;Zehdi et al, 2004a,b).…”

Section: Resultsunclassified

Variabilidade genética entre acessos de açaizeiro utilizando marcadores microssatélites

et al. 2010

View full text Add to dashboard Cite

RESUMOConduziu-se este trabalho, com o objetivo de caracterizar a variabilidade genética entre 116 acessos de açaizeiro da coleção de germoplasma da Embrapa Amazônia Oriental por marcadores microssatélites (SSR). As reações foram efetuadas com base em 116 amostras de DNA, utilizando sete primers SSR. Os níveis de polimorfismo e as estimativas das distâncias genéticas de Roger foram determinados pelas frequências alélicas e agrupado pelo método UPGMA. Os sete locos SSR revelaram 42 alelos com média de 6 alelos por loco. O conteúdo de informação de polimorfismo (PIC) variou de 0,60 a 0,86 com média de 0,75 e as heterozigosidades observada (H o ) e esperada (H e ) foram de 0,54 e 0,75, respectivamente. A distância genética média entre todos os acessos foi de 0,61, variando de 0 a 0,96. O método UPGMA formou seis agrupamentos distintos delimitados pela distância genética média (dg m = 0,61). Os acessos de açaizeiro possuem alta diversidade para ser explorada em programas de melhoramento, sendo pelo menos quatro deles altamente divergentes com base nos marcadores SSR. Termos para indexação:Euterpe oleracea, germoplasma, polimorfismo, diversidade genética, SSR. ABSTRACTThe objective of this work was to characterize genetic variability among 116 accessions of assai palm of the Embrapa Eastern Amazon Germplasm Collection, were examined with microsatellite (SSR) markers. The 116 DNA sample were utilized in the reactions with seven SSR loci. The levels of polymorphism and Roger's genetic distance were estimated from allele frequencies and clustered with the UPGMA method. The seven SSR loci revealed 42 alleles, with average of 6 alleles per locus. The polymorphic information content (PIC) varied from 0.60 to 0.86, with average of 0.75 and observed (H o ) and expected (H e ) heterozygosities were 0.54 and 0.75, respectively. The mean genetic distance between all accessions was 0.61, varying from 0.00 to 0.96. The UPGMA dendrogram presented six distinct groupings, delimited by the mean genetic distance (dg m = 0.61). The accessions of assai palm possess high diversity that may be explored in breeding program and germplasm organization, with at least, four highly divergent accessions.

show abstract

Genetic Structure, Mating System, and Long-Distance Gene Flow in Heart of Palm (Euterpe edulis Mart.)

Cited by 118 publications

References 29 publications

Genetic diversity and spatial genetic structure in populations of Orbignya phalerata Mart. under different exploitation intensities in the Brazilian savanna

Genetic diversity and spatial genetic structure in populations of Orbignya phalerata Mart. under different exploitation intensities in the Brazilian savanna

Effect of selective logging on genetic diversity and gene flow in Cariniana legalis sampled from a cacao agroforestry system

Variabilidade genética entre acessos de açaizeiro utilizando marcadores microssatélites

Contact Info

Product

Resources

About