TAILIEUCHUNG - Báo cáo khoa học: "Intra- and interpopulational genetic variation in juvenile populations of Quercus robur L and Quercus petraea Lieb"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Intra- and interpopulational genetic variation in juvenile populations of Quercus robur L and Quercus petraea Liebl. | Ann Sci For 1993 50 Suppl 1 233s-244s Elsevier INRA 233s Original article Intra- and interpopulational genetic variation in juvenile populations of Quercus robur L and Quercus petraea Liebl G Muller-Starck 1 2 s Herzog 1 HH Hattemer1 Institut fur Forstgenetik und Forstpflanzenzuchtung der Universităt Gottingen 3400 Gottingen-Weende Germany 2 Eidgenõss Forschungsanstalt fur Wald Schnee und Landschaft Zurcherstrasse 111 8903 Birmensdorf Switzerland Summary In each of 5 2-year-old populations of Quercus robur and Q petraea single and multipopulation samples genetic variation was quantified with respect to 13 polymorphic enzyme coding gene loci. Genetic control and inheritance of isoenzymes was verified beforehand by means of analyses of full-sib families. The observed average heterozygosities were o robur and for Q petraea conditional heterozygosities of and respectively . The mean number of alleles per locus is for Q robur and for Q petraea. The relatively small genetic diversities indicate minor polymorphisms. The genetic distances between pairs of samples indicate remarkable differences between populations. Most of the single population samples could be proven to share a smaller proportion of the entire gene pool than each of the multipopulation samples. There is a strong genetic similarity between Q robur and Q petraea in terms of common alleles. It is concluded that more than in other species large genetic variation must be incorporated into oak population in order to maintain the ability of these species to adapt to heterogeneous environments. Quercus robur Q petraea I alloenzymes heterozygosity diversity genetic distahce genetic differentiation Resume Variabilité génétique intra- et interpopulation dans de jeunes populations de Quer-cus robur L et de Quercus petraea Liebl. La variablité générique a été estimée dans 5 populations de Quercus robur et 5 populations de Q petraea à partir de 13 loci polymorphes contròlant expression d .

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