Sexual asymmetry in Scots pine seed orchards

• Autorzy: Danusevicius J
• Języki publikacji: EN

Abstrakty

EN

In seed orchards of Scots pine Pinus sylvestris L., the reproductive process is affected by the variation among the clones in fertility and abundance of male and female flowering. There were significant differences between the clones in relative proportion of male and female strobili as well as in seed yield. Thus, clones in Scots pine seed orchards may differentiate into "seed" and "pollen" clones. The least fertile clone produce 4.6 times less pollen than the most fertile clone, while cone yield of the least yielding clones was 5.5 times smaller than that of the most yielding clones. Amount of the pollen dispersed at the upper part of the crowns was two times greater than at the base of the crowns. The minimum amount of pollen needed for successful fertilization of an ovule was 1500 grains per cm2. There was no significant relationship between sexual asymmetry of the parental clones and height growth of their progeny.

Słowa kluczowe

EN

Scotch pine; pollen; reproductive process; flowering process; orchard; Pinus sylvestris; sexual asymmetry; seed

• Wydawca: -
• Czasopismo: Dendrobiology
• Rocznik: 2002
• Tom: 47 Supplement
• Opis fizyczny: p.83-88,fig.,ref.

Twórcy

autor

Danusevicius J

• Lithuanian Forest Research Institute, Girionys 1, LT-4312 Kaunas reg., Lithuania

Bibliografia

• Abaturova M.P. 1988. Difrencijacija populiacij sosny v kontrastych uslovyjach proizrostanija [Differentiation of Scots pine population under different growth conditions]. Lesovedinije 1: 10–16 (In Russian).
• Adams G.W. and Kunze H.A. 1996. Clonal variation in cone and seed production in black and white spruce seed orchards and management implications. For. Chron. 72: 475–480.
• Burczyk J. and Chalupka V. 1997. Flowering and cone production variability and its effect on parental balance in a Scots pine clonal seed orchard. Ann. Sci. For. 54: 128–144.
• Chaisurisri K. and El-Kassaby Y.A. 1993. Estimation of clonal contribution to cone and seed crops in a Stika spruce seed orchard. Ann. Sci. For. 50: 461–467.
• Efimov J.P. 1982. Izmenchivost sosny obyknovenoj po tipu seksualizacii i ee znachenije dla lesnovo selmenovotstva [Scots pine variation in sex type and its importance to forest seed management]. Geneticheskyje osnovy lesnoj selekcii i semenovodstva [Genetic basis for forest tree breeding and seed management]. Voronez, pp. 66–75(In Russian).
• El-Kassaby Y.A. and Askew G.R. 1991. The relation between reproductive phenology and reproductive output in determining the gametic pool profile in a Douglas-fir seed orchard. For. Sci. 37: 827–835.
• Gregorius H.R. und Ross M.D. 1981. Selection in pine populations of effectively infinite size: 1. Realized fitness. Maht. Biosc. 4: 295–307.
• Griffin A.R. 1982. Clonal variation in radiata pine seed orchards II. Flowering phonology. Aust. For. Res. 14: 271–281.
• Hoekstra P.B. 1965. A simple inexpensive pollen trap. US Forest service research note SE – 40, February 1965.
• Kang K.S. 2000. Clonal and annual variation of flower production and composition of gamete gene pool in a clonal seed orchard of Pinus denciflora. Can. J. For. Res. 30: 1275–1280.
• Kang K. 2001. Genetic gain and gene diversity of seed orchard crops. Ph.D thesis, Swedish University of Agricultural Sciences, ISSN 1401–6230, pp. 8–77.
• Kang K.S. and Lindgren D. 1998. Fertility variation and its effect on the relatedness of seeds in Pinus denciflora, Pinus thunbergii and Pinus koraiensis clonal seed orchards. Silvae Genet. 6: 191–200.
• Korcagin A.A. 1960. Metody utchota semenonoshenija drevesnych porod i lesnych soobchestv [Methods for assessment of seed yield of forest trees]. “Polovaja geobotanika”, USSR Academy of Sciences, pp. 41–132 (In Russian).
• Matziris D. 1994. Genetic variation in the phenology of flowering in Black pine. Silvae Genet. 43: 321–328.
• Muller-Stark G. and Ziehe M. 1984. Reproductive systems in conifer seed orchard. 3. Female and male fitness of individual clones realized in seed orchards of Pinus sylvestris L. Theor. Appl. Genet. 69: 173–177.
• Nekrasova T.P. 1960. Plodonoshenyje sosny v zapandoj Sibiri [Seed yield of Scots pine in western Siberia]. “Nauka”, Novosibirsk, 131 p. (In Russian).
• Pravdin L.F. 1950. Polovoj dimorfizm sosny obyknovenoj (Pinus sylvestris L.) [Sexual asymmetry in Scots pine]. Reports of Forest Research Institute of Academy of Science, Moscow USSR No. 3 (In Russian).
• Schoen D.J. and Stewart S.C. 1987. Variation in male fertilities and pairwise mating probabilities in Picea glauca. Genetics 116: 141–152.
• Wareing 1958. Reproductive development in Pinus sylvestris. The Physiology of Forest Trees. Ed. K.V. Thiman Ronald press. N.Y. pp. 643–654.
• Ziehe M. 1982. Sexually asymmetric selection and partial self – fertilization. Population genetic impact on the zygotic genotypic structure. Silva Fennica (16) 2: 22–31.