Avaliação da diversidade genética em acessos de Psidum spp. via marcadores RAPD

Pessanha, Patrícia Gomes de Oliveira; Viana, Alexandre Pío; Júnior, Antônio Teixeira do Amaral; Souza, Ricardo Moreira; Teixeira, Milena Carvalho; Pereira, Messias Gonzaga

doi:10.1590/s0100-29452011000100018

Cited by 33 publications

(27 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the latter does not have the same economic importance as guava, they are of interest for research because their fruits show desirable characteristics with an exotic flavor and high levels of vitamin C. Furthermore, they are being studied as a source of tolerance to Meloidogyne enterolobii, a pest that has decimated guava orchards (Raseira and Raseira, 1996;Souza et al, 2006). Guava is a species that shows a high genetic diversity, due to the mixed reproductive system, as well as the use of seeds originating from heterozygous genitors for the production of seedlings (Alves and Freitas, 2007;Pessanha et al, 2011). Pessanha et al (2011) used the random amplified polymorphic DNA (RAPD) marker to evaluate the genetic diversity among 20 accessions of Psidium.…”

Section: Introductionmentioning

confidence: 99%

“…Guava is a species that shows a high genetic diversity, due to the mixed reproductive system, as well as the use of seeds originating from heterozygous genitors for the production of seedlings (Alves and Freitas, 2007;Pessanha et al, 2011). Pessanha et al (2011) used the random amplified polymorphic DNA (RAPD) marker to evaluate the genetic diversity among 20 accessions of Psidium. Similarly, Erig et al (2003) studied the genetic diversity among 24 accessions of araçazeiros by using RAPD markers and separated the genotypes into 4 groups in which the first showed 40% of similarity with the others, while the largest proximity was found between the last two.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Allelic database and divergence among Psidium accessions by using microsatellite markers

Costa¹,

Santos²

2013

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT. This study aimed to investigate the genetic variability among guava accessions and wild Psidium species of the Embrapa Semiárido germplasm collection by using microsatellite loci to guide genetic resources and breeding programs, emphasizing crosses between guava and other Psidium species. DNA was extracted using the 2X CTAB method, and polymerase chain reaction products were analyzed on 6% denatured polyacrylamide gels stained with silver nitrate. The unweighted pair-group method using arithmetic average dendrogram generated from the distance matrix of the Jaccard coefficient for 183 alleles of 13 microsatellite loci was used for visualization of genetic similarity. The number of base pairs was estimated using inverse mobility method based on the regression of known-size products. Analysis of molecular variance was performed using total decomposition between and within guava accessions. The accessions showed similarity from 0.75 to 1.00, with the dendrogram presenting cophenetic value of 0.85. Five groups were observed: the first included guava accessions; the second, P. guineense accessions; the third, one accession of P. friedrichsthalianum; and the last 2 groups, P. cattleianum. The genetic similarity among P. SSR Psidium allelic database and accession divergence guineense and some guava accessions were above 80%, suggesting greater possibility to obtain interspecies hybrids between these 2 species. The genetic variability between the accessions was considered to be high (Φ ST = 0.238), indicating that guava genetic variability is not uniformly distributed among the 9 Brazilian states from where the accession were obtained. Obtaining a greater number of accessions by Brazilian states is recommended in order to have greater diversity among the species.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Allelic database and divergence among Psidium accessions by using microsatellite markers

Costa¹,

Santos²

2013

Genet. Mol. Res.

View full text Add to dashboard Cite

show abstract

“…Seventeen full-sib progenies were evaluated, which were obtained from biparental controlled crosses of individuals from a small farm called Providência, in the municipality of Bom Jesus do Itabapoana, also in the state of Rio de Janeiro, which belong to the germplasm bank of Universidade Estadual do Norte Fluminense Darcy Ribeiro (Uenf). For the controlled crosses, nine parents were selected by the genetic diversity analysis based on the random amplified polymorphic DNA (RAPD) marker (Pessanha et al, 2011).…”

Section: Methodsmentioning

confidence: 99%

Associations between vegetative and production traits in guava tree full-sib progenies

Santos

Preisigke

Viana

et al. 2017

Pesq. agropec. bras.

Self Cite

View full text Add to dashboard Cite

-The objective of this work was to estimate the genetic parameters and to evaluate the associations between vegetative and yield characteristics, in full-sib progenies of guava tree (Psidium guajava). The following characteristics were evaluated: yield per plant, number of fruits, fruit mass, plant height, stem diameter, and canopy volume. The estimation of genetic parameters was obtained by the REML/Blup procedure. Based on the breeding values predicted by Blup, the genetic and canonical correlations were estimated, and the genetic correlation coefficients were unfolded into direct and indirect effects on the character yield per plant using path analysis. Genetic variability was estimated for number of fruits (567.66) and yield per plant (11.818), with high genetic correlation (0.9045), indicating simultaneous selection. Indirect selection did not promote simultaneous gains for yield per plant with the primary components number of fruits and fruit mass, making it difficult to obtain guava cultivars with high yield, number of fruits, and fruit mass. The vegetative traits had little effect on yield, number of fruits, and fruit mass.Index terms: Psidium guajava, correlations, path analysis, REML/Blup. Associações entre características vegetativas e de produção em progênies de irmãos completos de goiabeiraResumo -O objetivo deste trabalho foi estimar os parâmetros genéticos e avaliar as associações entre características vegetativas e de produção em progênies de irmãos completos de goiabeira (Psidium guajava). Avaliaram-se as seguintes características: produção por planta, número de frutos, massa de frutos, altura da planta, diâmetro de caule e volume de copa. A estimativa de parâmetros genéticos foi obtida com o procedimento REML/Blup. Com base nos valores genéticos preditos pelo Blup, estimaram-se as correlações genéticas e canônicas, e realizou-se o desdobramento dos coeficientes de correlação genética em efeitos diretos e indiretos sobre a característica produção por planta, com análise de trilha. Estimou-se variabilidade genética para número de frutos (567,66) e produção por planta (11,818), com alta correlação genética (0,9045), o que evidencia seleção simultânea. A seleção indireta não promoveu ganhos simultâneos para produção por planta a partir dos componentes primários número de frutos e massa de frutos, o que dificulta a obtenção de cultivares de goiabeira com alta produção, número de frutos e massa de fruto. As características vegetativas apresentaram pouca influência na produção, no número de frutos e na massa de frutos.Termos para indexação: Psidium guajava, correlações, análise de trilha, REML/Blup.

show abstract

“…The parents used for the crosses were selected based on the study on genetic diversity via molecular markers (Pessanha et al 2011). Since they were originated from parents with considerable degree of heterozygosity, the seeds from these crosses generated an S 0 population with large genetic variability.…”

Section: Plant Materialsmentioning

confidence: 99%

Genetic gain estimated by different selection criteria in guava progenies

et al. 2016

Self Cite

View full text Add to dashboard Cite

Guava plays an important role in Brazilian agribusiness.Among other goals, guava breeding programs aim to achieve more productive cultivars and improved fruit quality. Thus, the present study aimed to investigate genetic variability in full-sib progenies of Psidium guajava (guava) and estimate the genetic progress obtained from different selection criteria in order to select the most promising genotypes. This is the first work that uses these criteria of selection to guava. The experiment was conducted in randomized block design with 2 replicates, and 10 progenies were Received: Oct. 8, 2015 -Accepted: Feb. 17, 2016 predicting the genetic gain between and within progenies. The 5 best progenies among those analyzed and 4 plants within the progenies were selected. Direct selection provided higher gains for number of fruits, and indirect selection generated small gains for the other traits. When the trial values were used as economic weight, the classic index was the selection criterion that showed the best results for gains in fruit number and fruit weight, being indicated as the most appropriate selection strategy for genetic breeding in the studied population.

show abstract

Avaliação da diversidade genética em acessos de Psidum spp. via marcadores RAPD

Cited by 33 publications

References 14 publications

Allelic database and divergence among Psidium accessions by using microsatellite markers

Allelic database and divergence among Psidium accessions by using microsatellite markers

Associations between vegetative and production traits in guava tree full-sib progenies

Genetic gain estimated by different selection criteria in guava progenies

Contact Info

Product

Resources

About