Factors influencing levels of genetic diversity in woody plant species

Hamrick, J. L.; Godt, Mary Jo W.; Sherman-Broyles, Susan L.

doi:10.1007/bf00120641

Cited by 1,315 publications

(1,066 citation statements)

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“…According to our estimates of F ST and AMOVA, most of the genetic variation is found within populations for all three species of Astrocaryum, following expectation for woody species (Hamrick et al, 1992). Nevertheless, genetic differentiation among A. aculetaum populations was significantly higher than for the other two species (Figure 1) likely explained by the greater distance between sample sites for A. aculetaum.…”

Section: Discussionsupporting

confidence: 72%

“…Of these, molecular markers offer numerous advantages over the other two types. First, they are stably expressed and detectable in all tissues regardless of growth and cell differentiation (Hamrick et al, 1992;Mondini et al, 2009). Moreover, molecular markers are not influenced by the environment, as are morphological traits (Hamrick et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

“…First, they are stably expressed and detectable in all tissues regardless of growth and cell differentiation (Hamrick et al, 1992;Mondini et al, 2009). Moreover, molecular markers are not influenced by the environment, as are morphological traits (Hamrick et al, 1992). Importantly, microsatellites are especially good for studies of population genetic structure because they are highly polymorphic and allow for the final scaleresolution of population genetic parameters.…”

Section: Introductionmentioning

confidence: 99%

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Research Article Population genetic structure of three species in the genus Astrocaryum G. Mey. (Arecaceae).

Oliveira

Davide

et al. 2017

Genet. Mol. Res.

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ABSTRACT.We assessed the level and distribution of genetic diversity in three species of the economically important palm genus Astrocaryum located in Pará State, in northern Brazil. Samples were collected in three municipalities for Astrocaryum aculeatum: Belterra, Santarém, and Terra Santa; and in two municipalities for both A. murumuru: Belém and Santo Antônio do Tauá and A. paramaca: Belém and Ananindeua. Eight microsatellite loci amplified well and were used for genetic analysis. The mean number of alleles per locus for A. aculeatum, A. murumuru, and A. paramaca were 2.33, 2.38, and 2.06, respectively. Genetic diversity was similar for the three species, ranging from H E = 0.222 in A. aculeatum to H E = 0.254 in A. murumuru. Both F ST and AMOVA showed that most of the genetic variation was found within populations for all three species, but high genetic differentiation among populations was found for A. aculeatum. Three loci were not in HardyWeinberg equilibrium, with populations of A. paramaca showing a tendency for the excess of heterozygotes (F IS = -0.144). Gene flow was 2 N.P. Oliveira et al. Genetics and Molecular Research 16 (3): gmr16039676 high for populations of A. paramaca (N m = 19.35). Our results suggest that the genetic diversity within populations followed the genetic differentiation among populations due to high gene flow among the population. Greater geographic distances among the three collection sites for A. aculeatum likely hampered gene flow for this species.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research Article Population genetic structure of three species in the genus Astrocaryum G. Mey. (Arecaceae).

Oliveira

Davide

et al. 2017

Genet. Mol. Res.

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“…The analysis of molecular variance (AMOVA) shows that most of the variation in the NIFOR oil palm main breeding parents lies within populations, a result compatible with those from AFLP, Isozymes, and SSR studies involving oil palm germplasm collections and out-breeding plant species [8] [28] [69] [79]. Consequent upon partitioning of genetic diversity, there is a considerable genetic diversity within populations that may be exploited in population improvement programme.…”

Section: Genetic Differentiation Among the Three Groups Of Parental Gmentioning

confidence: 85%

Assessment of Genetic Diversity of NIFOR Oil Palm Main Breeding Parent Genotypes Using Microsatellite Markers

Okoye¹,

Uguru²,

Bakoumé³

et al. 2016

AJPS

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The genetic diversity among 15 NIFOR breeding parents was assessed using 10 microsatellite markers. A high genetic diversity was observed with a total of 64 alleles including 23 rare alleles or alleles at frequencies less than 0.05. The NIFOR tenera parents recorded the highest number of rare alleles. The average observed heterozygosity and mean gene diversity across all parental groups were 0.6889 and 0.7029, respectively. Higher genetic diversity was detected among the NIFOR dura and tenera parents compared to that of the Deli dura parents in absolute terms. Analysis of molecular variance (AMOVA) showed that 87% of the total variation (p < 0.001) observed was due to differences among parents. Rogers' genetic distance ranged from 0.2988 to 0.8000 (mean = 0.5570). The dendrogram constructed on the basis of Rogers' genetic distance clustered the parents in three groups. They generally clustered in heterotic manner rather than by geographic origins. The groupings obtained through PCoA confirmed the results obtained by cluster analysis. The results obtained are strong assets for NIFOR breeding programme.

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“…The AMOVA showed significant and large value of genetic differentiation (F ST = 0.177, P = 0.001) and indicating that the total genetic diversity observed was due to genetic differentiation within the sources of parental materials like in most perennial out-breeding species which maintain most of their variation within populations (Hamrick et al, 1992). Genetic distance is a measure of the genetic divergence between species or between populations within a species.…”

Section: Genetic Differentiation and Relatedness Among Nifor And Mpobmentioning

confidence: 99%

Genetic Relationships between Elite Oil Palms from Nigeria and Selected Breeding and Germplasm Materials from Malaysia via Simple Sequence Repeat (SSR) Markers

Okoye¹,

Bakoumé²,

Uguru³

et al. 2016

JAS

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Nine SSR markers were used to study the genetic relationships among 26 elite oil palm materials from Nigeria and Malaysia. The Nigerian elite materials comprised 15 Nigerian Institute for Oil Palm Research (NIFOR) oil palm parental genotypes. The 11 Malaysian genotypes included 2 dura and 2 pisifera advanced breeding lines, 3 palms from natural populations of Nigeria, and 2 from each of the Angola, and Madagascar natural oil palm collections maintained at the Malaysian Palm Oil Board (MPOB). The results revealed a high percentage of polymorphic loci (83.3%) in the entire materials with average polymorphic information content (PIC) of 0.7325. Two SSR markers showed relatively high PIC namely sMg00016 and sMg00179 (0.8018 and 0.8509, respectively). The mean number of alleles varied from 1.333 in Madagascar germplasm material to 4.889 in NIFOR tenera materials (mean = 2.958). The observed heterozygosity varied from 0.167 in Madagascar material to 0.778 in Nigeria germplasm materials (mean = 0.575) and the expected heterozygosity from 0.153 to 0.643. The various oil palm provenances showed significant genetic differentiation (F ST = 0.177, P = 0.001) indicating the existence of a genetic structure among the materials used. UPGMA analysis based on Rogers' dissimilarity coefficient matrix displayed two main clusters, one separating Madagascar accessions from the rest. PCoA showed that the NIFOR breeding parents clustered closely with MPOB's Nigeria and Angola-derived materials suggesting a common origin of mainland genotypes. The high genetic diversity observed among the MPOB's germplasm materials highlights the need for proper characterization of entire NIFOR oil palm germplasm with SSR markers to facilitate effective utilization in the breeding programme.

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Factors influencing levels of genetic diversity in woody plant species

Cited by 1,315 publications

References 22 publications

Research Article Population genetic structure of three species in the genus Astrocaryum G. Mey. (Arecaceae).

Research Article Population genetic structure of three species in the genus Astrocaryum G. Mey. (Arecaceae).

Assessment of Genetic Diversity of NIFOR Oil Palm Main Breeding Parent Genotypes Using Microsatellite Markers

Genetic Relationships between Elite Oil Palms from Nigeria and Selected Breeding and Germplasm Materials from Malaysia via Simple Sequence Repeat (SSR) Markers

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