Unexpected disproportion observed in species composition between oak mixed stands and their progeny populations

Dering, Monika; Lewandowski, Andrzej

doi:10.1051/forest:2007018

Cited by 4 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the estimates were larger in this study than in many other studies of similar character. Dering and Lewandowski (2007) studied the species composition in two Polish mixed stands of Q. petraea and Q. robur and in seven plantations with material originating from these two stands. Natural regeneration in the stands was also assessed.…”

Section: Markersmentioning

confidence: 99%

Quercus petraea and Quercus robur: recent genetic research

Eriksson¹

2015

View full text Add to dashboard Cite

for Agricultural Sciences (SLU), Uppsala, since 1971. His responsibilities included teaching-related tasks in forest genetics and tree breeding as part of the bachelor's, master's and doctoral programmes at the faculty. He has supervised 23 PhDs and served on the selection committee for the appointment of eight professors, two of them in Sweden. Besides domestic teaching duties, he was one of four main lecturers for international courses on forest tree gene conservation organized by EUFORGEN and the Federal Forest Research Centre in Austria, and has been an invited guest lecturer in most western European countries as well as Canada, China, Japan, and the USA. He is still an active member of the

show abstract

Section: Markersmentioning

confidence: 99%

Quercus petraea and Quercus robur: recent genetic research

Eriksson¹

2015

View full text Add to dashboard Cite

show abstract

“…In practice, this can diminish the effect of hybridization. Dering and Lewandowski (2007) have demonstrated that species structure can be dramatically altered between Q. robur and Q. petraea depending on fitness and postzygotic selection of seeds and plants. Tendency towards closed forest canopy will promote survival of Q. petraea seedlings whereas large open forest gaps will promote the survival of Q. robur seedlings.…”

Section: Hybridizationmentioning

confidence: 99%

Hybridization between Quercus robur and Q. petraea in a mixed oak stand in Denmark

Jensen¹,

Larsen²,

Nielsen³

et al. 2009

Ann. For. Sci.

View full text Add to dashboard Cite

Abstract• Hybridization and mating pattern between Quercus robur and Q. petraea was studied in a 5.8 ha mixed forest stand in Jutland, Denmark which comprises in total 135 Quercus robur and 230 Q. petraea trees. Classification of the oak trees into species was performed using canonical discriminant analysis of a range of leaf morphological traits. Adult trees (365) and offspring (582) were genotyped with eight microsatellite markers. Seedlings were sampled in 2003 and acorns were collected in 2004.• Mating patterns of Q. robur and Q. petraea are expected to be different in the northern range of the distribution area and a larger hybridization rate is expected. It is further expected, that pollination from outside sources will be relatively less in small fragmented forest management systems compared to large scale oak forest. The conclusions should be verified through repeated year to year analysis of the mating pattern.• Phenological studies revealed that there was no difference in flowering time between species. Data for the adult trees revealed no significant departures from Hardy-Weinberg proportions and there was weak, but significant spatial genetic structure, which supports the idea that the stand is of natural origin. Spatial genetic structure in the first distance class is stronger for Q. petraea. The genetic composition of the offspring was remarkably consistent from year to year. Paternity analysis revealed that, on average, 85% pollination came from fathers within the stand. The direction of the pollen flow varied from year to year. Inter-specific hybridization was high and ranged from 15-17% and from 48-55% for Q. petraea and Q. robur mothers respectively. Paternity analysis revealed that the population was basically outcrossing and only 3.7% of the analysed progeny were the product of selfing. Over the two years of study, approximately 200 trees contributed to the paternity of the next generations.• The study confirms earlier studies with a greater tendency for Q. robur mothers to produce hybrid seeds than Q. petraea mothers. The rate of hybridization is higher in this Danish stand than in comparable studies elsewhere in Europe. Gene flow from outside sources are relatively low. • Des études phénologiques montrent qu'il n'y a pas de différence entre les espèces pour la période de floraison. Les données sur arbres adultes ne révèlent aucun écart significatif par rapport aux proportions attendues de la loi de Hardy-Weinberg. Une structuration spatiale faible mais significative a été mise en évidence, qui suggère l'idée que le peuplement est d'origine naturelle. Cette structuration est plus forte pour Q. petraea. La composition génétique des descendances est remarquablement stable d'une année sur l'autre. Les analyses de paternité révèlent qu'en moyenne 85 % de la pollinisation provient de pères du peuplement. Le sens de pollinisation varie d'une année sur l'autre. Le taux d'hybrides interspécifiques est élevé et varie de 15-17 % et de 48-55 % respectivement pour Q. petraea et Q. robur. Les études de p...

show abstract