Heritability for resistance to Puccinia psidii Winter rust in Eucalyptus grandis Hill ex Maiden in Southwestern Brazil

Miranda, Alice; Moraes, Mário Luiz Teixeira de; Tambarussi, Evandro Vagner; Furtado, Edson Luiz; Mori, Édson Seizo; Silva, Paulo Roberto Arbex; Sebbenn, Alexandre Magno

doi:10.1007/s11295-012-0572-x

Cited by 26 publications

(27 citation statements)

References 18 publications

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“…The high CV gi values show possibilities for selection in breeding programs. Miranda et al (2013) found very similar CV gi values (11.7% -36.7%) for Eucapyptus grandis by nine different locations.…”

Section: Resultsmentioning

confidence: 60%

Genetic variability in progenies of Eucalyptus dunnii Maiden for resistance to Puccinia psidii

Pinto

Costa

Moraes

et al. 2014

Crop Breed. Appl. Biotechnol.

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Section: Resultsmentioning

confidence: 60%

Genetic variability in progenies of Eucalyptus dunnii Maiden for resistance to Puccinia psidii

Pinto

Costa

Moraes

et al. 2014

Crop Breed. Appl. Biotechnol.

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“…The field data were collected in September of 2003 when plants were two years old. A variance analysis was performed by converting data into (MIRANDA et al, 2013), in which x is the score of a plant. The data normality was tested by the Shapiro-Wilk's W test (SAS, 1999), which showed a normal distribution (W = 0.9479, P = 0.0016).…”

Section: Field Methodology and Disease Evaluationmentioning

confidence: 99%

“…On the other hand, even if and decreased after adjusting additive variance with mating system parameters, the adjusted values would continue to support a high genetic control of the resistance trait and a potential population improvement by mass selection. On the other hand, Miranda et al (2013) detected a low genetic control by means of individual heritability ( ranging from 0.06 to 0.46, with a mean of 0.24) and within progeny ( ranging from 0.04 to 0.34, with a mean of 0.16), studying nine E. grandis populations through progeny testing in Brazil. In another study, Pinto et al (2014) found moderate (heritability at the individual level) and high (among progenies heritability) heritability for rust resistance in E. dunni under controlled and field conditions.…”

Section: Genetic Control Of Rust Resistancementioning

confidence: 99%

“…The differences between the above-cited studies and ours are because the heritability is a parameter that interacts with the environment. Additionally, Miranda et al (2013) corrected the additive genetic variance using the relatedness coefficient, which was not calculated for each individual population but on the basis of mean outcrossing rate, selfing correlation ( ) and parental correlation ( ) from five different eucalyptus species (E. camaldulensis, E. globulus, E. morrisbyi, E. rameliana and E. marginata).…”

Section: Genetic Control Of Rust Resistancementioning

confidence: 99%

“…ex Maiden is a timber species occurring naturally in Australia and has a rapid growth under tropical and subtropical conditions. Its wood has good quality for pulp and paper, sawmill, and hardboard industries (MIRANDA et al, 2013). In Brazil, however, a lot of species of the genus Eucalyptus have been damaged by diseases such as rust (Puccinia psidii Winter), which represents today one of the most harmful diseases affecting them (PINTO et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Rust resistance and mating system in Eucalyptus grandis Hill ex Maiden progenies

Bertoncini¹,

Tambarussi²,

Sebbenn³

et al. 2017

Sci. For.

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ResumoPopulações de Eucalyptus grandis foram introduzidas no Brasil a partir de Queensland e New South Wales, Austrália. No entanto, no Brasil, estas plantas têm sido severamente prejudicadas pela ferrugem (Puccinia psidii Winter). Portanto, objetivamos estimar os parâmetros do sistema de reprodução e a herdabilidade para resistência a ferrugem em E. grandis por meio de um teste de progênies. Nós avaliamos a resistência a ferrugem em vinte e cinco progênies de polinização aberta, que foram severamente afetadas por P. psidii, utilizando quatro marcadores de microssatélites. A taxa de cruzamento foi significativamente menor do que a unidade ( = 0.782) e a diferença entre as taxas multilocus e unilocus foi significativamente maior do que zero ( = 0.077). Esses resultados mostram que algumas sementes eram endogâmicas como confirmado pelo índice de fixação ( = 0,144, P< 0,05). Além disso, a correlação de paternidade ( = 0,102) indicou um pequeno número de irmãos-completos dentro de progênies. O coeficiente de parentesco estimado dentro de progênies ( ) foi significativamente maior (0,421) do que o esperado para meios--irmãos (0,25). O coeficiente de herdabilidade entre progênies ( = 0,956), bem como em nível individual ( = 0,634) e dentro de progênies ( = 0,515) foram elevados. Nossos resultados evidenciaram forte controle genético para o caráter resistência à ferrugem, indicando que o melhoramento dessas populações pode ser feito pela seleção massal ou pela seleção simultânea entre e dentro de progênies.Palavras-chave: Parâmetros genéticos; teste de progênie; Puccinia psidii; sistema de reprodução. AbstractPopulations of Eucalyptus grandis were introduced into Brazil from Queensland and New South Wales, Australia. However, in Brazil, these plants have been severely injured by rust (Puccinia psidii Winter). Therefore, we aimed at estimating mating system parameters and heritability of rust resistance in E. grandis through progeny testing. We evaluated rust resistance in twenty-five open-pollinated progenies severely affected by P. psidii using four microsatellite markers. Outcrossing rate was significantly lower than unity ( = 0.782), and the difference between multilocus and single-locus was significantly higher than zero ( = 0.077). These findings highlight that a few seeds are inbred lines as confirmed by the fixation index ( = 0.144, P< 0.05). Furthermore, the paternity correlation ( = 0.102) indicated a small number of full-sibs within progenies. The estimated relatedness coefficient within progenies ( ) was significantly higher (0.421) than that expected for half-sibs (0.25). The mean heritability coefficient among progenies ( = 0.956), as well as at the individual level ( = 0.634) and within a progeny ( = 0.515) were high. Given that, our results indicated a strong genetic control on rust resistance and the feasibility in improving the populations by mass selection for both among and within progenies.

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Genetics and Tropical Forests

Деген¹,

Sebbenn

2014

Tropical Forestry Handbook

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Heritability for resistance to Puccinia psidii Winter rust in Eucalyptus grandis Hill ex Maiden in Southwestern Brazil

Cited by 26 publications

References 18 publications

Genetic variability in progenies of Eucalyptus dunnii Maiden for resistance to Puccinia psidii

Genetic variability in progenies of Eucalyptus dunnii Maiden for resistance to Puccinia psidii

Rust resistance and mating system in Eucalyptus grandis Hill ex Maiden progenies

Genetics and Tropical Forests

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