Genetic control of Eucalyptus urophylla and E. grandis resistance to canker caused by Chrysoporthe cubensis

Guimarães, Lúcio Mauro da Silva; Resende, Marcos Deon Vilela de; Lau, Douglas; Rosse, Leonardo Novaes; Alves, Alexandre Alonso; Alfenas, Acelino C.

doi:10.1590/s1415-47572010005000069

Cited by 22 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The genetic variability for resistance has been observed for several other diseases in eucalypt (Carvalho et al 1998;Zauza et al 2004;Guimarães et al 2010). The present study corroborates these results and confirms the existence of variability for resistance to E. psidii in eucalypt, what makes possible selection of resistant genotypes for commercial planting or for research purposes.…”

Section: Discussionsupporting

confidence: 90%

“…Unlike what occurs in the E. psidii 9 P. guajava pathosystem (Marques et al 2007), the variation in resistance of eucalypt clones and species to E. psidii was observed by artificial inoculations of the pathogen and confirmed observations of the disease under natural infection in the field. The genetic variability for resistance has been observed for several other diseases in eucalypt (Carvalho et al 1998;Zauza et al 2004;Guimarães et al 2010). The present study corroborates these results and confirms the existence of variability for resistance to E. psidii in eucalypt, what makes possible selection of resistant genotypes for commercial planting or for research purposes.…”

Section: Discussionsupporting

confidence: 90%

See 1 more Smart Citation

Methods of inoculation and evaluation of Erwinia psidii in eucalypt

et al. 2015

View full text Add to dashboard Cite

The dieback and wilting caused by Erwinia psidii are emerging eucalypt diseases that have been observed since 2014 in the south and central-south regions of Brazil. Field observations have shown variability in disease severity resistance among Eucalyptus spp. clones and species. It is hypothesized that this variability is due to genetic resistance. To confirm this hypothesis, inoculations in genetically distinct eucalypt plants are necessary. However, lack of an inoculation method and disease assessment makes difficult to select resistant genotypes for use in commercial plantations or genetic breeding programmes. Three inoculation methods were tested on eight clones of Eucalyptus spp. Among them, inoculum deposition with bacteria-impregnated toothpick on the axillary buds was the simplest and most effective, capable to reproduce the disease symptoms observed under conditions of natural infection. We also developed a rating scale for disease assessment. Among eight clones tested, only Clone 1 (Eucalyptus saligna) and Clone 2 (Eucalyptus urophylla) were resistant.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 90%

Methods of inoculation and evaluation of Erwinia psidii in eucalypt

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Due to the large difference between the two heritability values, it can also be inferred that the character has high allelic dominance and, or epistasis. Discrepant heritability estimates in the broad and narrow sense were also reported by Guimarães et al (2010b) in the pathosystem Eucalyptus-canker (Chrysoporthe cubensis) in E. grandis x E. urophylla hybrid progeny inoculated under field conditions.…”

Section: Resultsmentioning

confidence: 57%

Resistance of Eucalyptus pellita to rust (Puccinia psidii)

Santos

Guimarães

Resende

et al. 2014

Crop Breed. Appl. Biotechnol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Host resistance was based on lesion length, which is an appropriate estimate of relative host resistance in this and other canker and heart rot systems (Blodgett, Eyles, & Bonello, 2007;Brawner et al, 2015;Guimaraes et al, 2010). Trees were destructively harvested 23 days after inoculation with three C. manginecans isolates.…”

Section: Lesion Length Assessmentmentioning

confidence: 99%

Screening for host responses in Acacia to a canker and wilt pathogen, Ceratocystis manginecans

et al. 2017

View full text Add to dashboard Cite

Summary 13In Vietnam, the productivity of Acacia hybrid (Acacia mangium x A. auriculiformis) 14 plantations is being threatened by an aggressive canker pathogen, Ceratocystis manginecans 15 and selection for tolerance is the main control strategy. A pot trial was established in Binh 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 56Silvicultural practices required to produce solid wood from Acacia include singling, pruning 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 Table 2). The identities of C. manginecans were determined from DNA sequence 98 data of the rDNA ITS and β-tubulin genes. DNA fragments were amplified using primers daily with 3 L of water using an automatic irrigation water system. 117The experiment was set up as a randomised complete block design, with five fungal The diameters (at 1.3 m tree height above pot surface) and heights of trees were measured 124 once, just prior to inoculation. All trees of each of the genotypes were of similar diameter 125(3.76 ± 0.11 cm; mean ± standard error) and height (491 ± 8 cm). In August 2014, 14-month-old trees were inoculated with a fungal isolate on the stem 50 cm 130 above the soil. In brief, the bark was removed with a sterile borer (10 mm diameter) and a 10 An 80-cm length of stem centered on the inoculation site was cut from the main seedling. 148This stem length was halved longitudinally through the inoculation wound with a blade (Fig. 149 1). A cordless drill was used to obtain shavings of sapwood from the following locations: 150• in inoculated treatment -the infected region (Fig. 1), 151• in wounded control treatment -adjacent to (above) the inoculation site, 152• in unwounded control treatment -healthy sapwood adjacent to (above) at a similar 153 height to the other treatments. Lesion length was significantly influenced by Acacia genotype (Fig. 3 and Table 3). The clones, the lesion length of BV10 was most similar to that of AA1. 226Lesion length was significantly affected by fungal isolate (Table 3). Lesion length of isolate 227 C3 was significantly higher by 93.1% and 36.6% than that of isolate C2 and C1, respectively. 228Lesion length of isolate C2 was significantly longer by 41.4% than that of isolate C1 (Fig. 4a). 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 With the exceptions...

show abstract

Genetic control of Eucalyptus urophylla and E. grandis resistance to canker caused by Chrysoporthe cubensis

Cited by 22 publications

References 15 publications

Methods of inoculation and evaluation of Erwinia psidii in eucalypt

Methods of inoculation and evaluation of Erwinia psidii in eucalypt

Resistance of Eucalyptus pellita to rust (Puccinia psidii)

Screening for host responses in Acacia to a canker and wilt pathogen, Ceratocystis manginecans

Contact Info

Product

Resources

About