Journal ArticleDOI
Responses to Inoculation With Diplodia Pinea in Progenies of Apparently Resistant Trees of Pinus Radiata
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There were some cases of real resistance with an additive genetic basis, although infection response seems to be only weakly heritable at the level of the individual.Abstract:
A glasshouse inoculation trial with Diplodia pinea (Desm) Kickx was carried out on 20 wind-pollinated progenies of Pinus radiata D Don The parents had been selected on a site of very high disease incidence for freedom from Diplodia-associated shoot dieback Compared with two control seed lots the progenies as a whole showed less infection after an inoculation than the controls (697% v 796%), this difference being statistically significant (P <005) in even the most stringent tests The contrast was somewhat less marked in respect of shoot dieback (368% v 444%) The progenies, however, were strongly variable among themselves, ranging from substantially less affected than the controls to marginally more affected This suggests that there were some cases of real resistance with an additive genetic basis, although infection response seems to be only weakly heritable at the level of the individualread more
Citations
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Journal ArticleDOI
Sphaeropsis sapinea, with Special Reference to its Occurrence on Pinus Spp. in South Africa
TL;DR: Sphaeropsis sapinea causes shoot blight, canker, collar rot, root disease and blue stain of Pinus spp.
Journal ArticleDOI
Achievements in forest tree genetic improvement in Australia and New Zealand 10: Pinus radiata in New Zealand
TL;DR: The Pinus radiata is the subject of much the largest and longest-running tree breeding program in New Zealand as discussed by the authors, and very intensive plus-tree selection began in the early 1950s, the first seed orchard planting was in 1958, and the first orchard seed was collected in 1968.
Journal ArticleDOI
Resistance levels of Spanish conifers against Fusarium circinatum and Diplodia pinea
Eugenia Iturritxa,Rebecca J. Ganley,Rosa Raposo,I. García-Serna,Nebai Mesanza,S. C. Kirkpatrick,Thomas R. Gordon +6 more
TL;DR: The findings suggest that selection of appropriate species can greatly reduce the risk of damage from two important canker diseases affecting pine plantations in the Atlantic region of Spain and implies that selection may allow for the enhancement of resistance in otherwise susceptible species.
Journal ArticleDOI
Differences in Aggressiveness of Sphaeropsis sapinea RAPD Marker Group Isolates on Several Conifers
J. T. Blodgett,Glen R. Stanosz +1 more
TL;DR: Based on symptom severity, East Anglia Scot's pine was most susceptible and balsam fir was least susceptible when inoculated with group A isolates, and the pathogen was recovered from both symptomatic and asymptomatic seedlings inoculating with isolates of either group.
References
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Journal ArticleDOI
Estimation of Heritability of Threshold Characters
TL;DR: In this paper, a pseudo-normal distribution was used to test the heritability of parent-offspring correlation and paternal sib correlation, and the results showed that the adjustment from theory was quite satisfactory for the paternal Sib correlation but would lead to substantial overestimates of heritability on the normal scale when p is small and normal heritability is actually large.
Journal Article
A shoot dieback in Pinus radiata caused by Diplodia pinea. 1. Symptoms, disease development, and isolation of pathogen.
TL;DR: A locally occurring dieback, similar to previously reported "red top", "shoot blight", and "tip blight", was investigated during 1971-73 in Pinus radiata in Tarawera Forest and showed every indication that it occurred through intact host tissue.
Journal Article
Stem volume loss due to severe Diplodia infection in a young Pinus radiata stand.
D. Currie,E. Toes +1 more
A shoot dieback in pinus radiata caused by
TL;DR: Inoculation trials confirmed the ability of Diplodia pinea (Desm) Kickx to invade undamaged young green shoots of Pinus radiata D. Don, resulting in dieback, and provide convincing evidence that D. pinea was the primary incitant of leader and shoot dieback in the Putauaki Block of Tarawera Forest.
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