RAPD analysis of genetic variability in a multiprovenance base population of Eucalyptus grandis hill ex maiden

Leite, Susi Meire Maximino; Mori, Édson Seizo; Valle, Celina Ferraz Do; Bonine, César Augusto Valencise; Marino, Celso Luís

doi:10.1590/s0100-67622008000600001

Cited by 2 publications

(2 citation statements)

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“…SPAs and native seedlots evaluated in this study had relatively higher number of alleles and PIC compared to CSOs, indicating the genetic quality of seed from different sources. Leite et al (2008) reported higher diversity in SPA progenies than wild E. grandis populations and 11 % lower diversity in CSO progeny compared to SPA. Offspring from clones harbor more diversity than the parent clones especially with regard to number of alleles in deployed crop (Ingvarsson and Dahlberg, 2018).…”

Section: Discussionmentioning

confidence: 89%

Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

et al. 2019

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Fertility and gene diversity were estimated in three second generation (F2) seed stands (SPA 1-3) and two clone trials (CSO 1&2) of Eucalyptus camaldulensis to assess the impact on seed crop. F2 seedlots were evaluated in comparison to native provenances, ten commercial clones and interspecific hybrids at diverse sites. SPA 1&2 were genetic gain trials of five first generation (F1) orchard seedlots, SPA 3 a plantation of one F1 orchard seedlot, and CSOs were clone trials of 21 commercial clones established at two contrasting sites. Fertility variation, as indicated by sibling coefficient, was high (Ψ, 9-14) in the SPAs as only about 26 % trees were fertile compared to 81 % trees in CSOs. Effective population size was higher in SPA 1 and 2 (Ns, 95 and 74, respectively) than SPA 3 (Ns = 39). Fertility was highly skewed in CSO 2 resulting in low effective population size (Ns = 2) compared to CSO 1 (Ns = 11). Constant seed collection enabled 3-fold increase in relative population size and 22 % higher predicted gene diversity in CSO 2. Genetic diversity (He) estimated using SSR markers was higher in SPA 1&2 and native provenances (NAT), compared to SPA 3 and CSO 1, whereas CSO 2 and clones had lower values. There was a high positive correlation between estimated He and predicted gene diversity values of SPAs and CSOs. He was positively correlated to mean field survival and negatively correlated to kraft pulp yield (KPY), evaluated at three years in progeny trials across three locations. Number of alleles per locus was higher in SPAs and native provenances compared to CSOs and clones. Discriminant principal component analysis clustered CSO, NAT and SPA seedlots in different groups while commercial E. camaldulensis clones clustered close to NAT. Multilocus outcrossing rate was generally high (tm, 91-100 %), though selfing was observed in two families of SPA 3 and CSO 2. Selected interspecific hybrid families of commercial E. camaldulensis clones (with E. urophylla and E. pellita) evaluated at two of the sites had higher He and KPY than clones at three years.

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Section: Discussionmentioning

confidence: 89%

Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

et al. 2019

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“…observed 0.40 for E. urophylla;Leite et al (1997) 0.67 for E. grandis; Pigato and Lopes (2001) 0.36 for E. urophylla; and Leite et al (2002) observed a mean distance of 0.68 for E. urophylla as well.…”

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confidence: 94%

Genetic divergence in Eucalyptus spp. clones by molecular RAPD markers

Pavan

Paula

Sena

et al. 2006

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The genetic divergence in 20 Eucalyptus spp. clones was evaluated by multivariate techniques based on 167 RAPD markers, of which 155 were polymorphic and 12 monomorphic. The measures of genetic distances were obtained by the arithmetic complement of the coefficients of Jaccard and of Sorenso-Nei and Li and evaluated by the hierarchical methods of Single Linkage clustering and Unweighted Pair Group Method with Arithmetic Mean (UPGMA). Independent of the dissimilarity coefficient, the greatest divergence was found between clones 7 and 17 and the smallest between the clones 11 and 14. Clone clustering was little influenced by the applied procedure so that, adopting the same percentage of divergence, the UPGMA identified two groups less for the coefficient of Sorenso-Nei and Li. The clones evidenced considerable genetic divergence, which is partly associated to the origin of the study material. The clusters formed by the UPGMA clustering algorithm associated to the arithmetic complement of Jaccard were most consistent.

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RAPD analysis of genetic variability in a multiprovenance base population of Eucalyptus grandis hill ex maiden

Cited by 2 publications

References 10 publications

Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensis

Genetic divergence in Eucalyptus spp. clones by molecular RAPD markers

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