Search Results

61 - 70 of 203 items :

  • Biotechnology x
  • Life Sciences x
Clear All
Stem breakage and forking in low and high elevation Pinus tecunumanii

References B irks , J. S. and R. D. B arnes (1995): Provenance variation in Pinus caribaea , P. oocarpa and P. patula ssp. tecunumanii . Tropical Forestry Papers. 21 : 40p. C osta , E. S. J and G. L ars (2008): Evaluation of an international series of Pinus kesiya provenance trials for growth and wood quality traits. Forest Ecology and Management 255 : 3477–3488. C rockford , K. J., A. J. D unsdon , W. B. H. B aylis , J. S. B irks and R. D. B arnes (1990): Evaluation of tropical pine provenance and progeny tests. ODA Research

Open access
Variation in Eucalyptus globulus LABILL. and E. nitens DEAN and MAIDEN in Susceptibility of Adult Foliage to Disease Caused by Mycosphaerella cryptica (COOKE) HANSF

diseases of juvenile foliage in a eucalypt species and provenance trial in Victoria, Australia. Aust. For. 61: 190-194. CARNEGIE, A. J., I. G. JOHNSON and M. HENSON (2004): Variation among provenances and families of blackbutt (Eucalyptus pilularis) in early growth and susceptibility to damage from leaf spot fungi. Can. J. For. Res. 34: 2314-2326. CARNEGIE, A. J. and P. K. KEANE (2003): Variation in severity of target spot, caused by Aulographina eucalypti, in a eucalypt species and provenance trial in Victoria. Aust. Plant. Path. 32: 393

Open access
Genetic parameter estimates and parental selection in Eucalyptus longirostrata and Corymbia henryi populations tested in South Africa

growth and stem straightness in provenance-family trial on saltland in Pakistan. Forest Ecology and Management 176 : 405–416. N amkoong , G. (1979): Introduction to Quantitative Genetics in Forestry. U.S. Department of Agriculture. Technical Bulletin No.1588. N dlovu , Z. T. L. (2009): Breeding of advanced generation of Eucalyptus macarthurii – growth parameters and development of a non-destructive near infrared (NIR) calibration model for screening of pulping properties. MSc Thesis, University of KwaZulu-Natal, Pietermaritzburg. SAS INSTITUTE

Open access
Influence of Plum Rootstocks on the Content of Reducing Sugars in the Annual Shoots of Cultivar ‘Kubanskaya Kometa’

. Morin, X., Ameglio, T. & Ahas, R. (2007). Variation in cold hardiness and carbohydrate concentration from dormancy induction to bud burst provenances of three European oak species. Tree physiology, 27, 817 - 825. 11. Pleshkov, B. P. (1976). Практикум по биохимии растений ( Practical guide of plant biochemistry). Moscow. Kolos. (in Russian). 12. Rozpara, E., Glowacka, A. & Grzyb, Z. S. (2010). The growth and yields of eight plum cultivars grafted on two rootstocks in central Poland. Acta Horticulturae, 874, 255 - 259. 13

Open access
Influence of Meteorological Factors on Needle Cast Damage in Young Scots Pine Stands

ietekmes uz Lophodermium seditiosum micēlija attīstību in vitro novērtējums. (Coniferous Tree Bark Extract’s Influence on Lophodermium seditiousum Mycelium Development In Vitro Assessment) Mežzinātne , 26 (59), 167.-181. 14. Kļaviņš, M., Blumberga, D., Bruņiniece, I., Briede, A., Grišule, G., Andrušaitis, A., Āboliņa, K. (2008). Klimata mainība un globālā sasilšana. (Climate Changeability and Global Warming) Rīga: LU Akadēmiskais apgāds, 176. 15. Liesebach, M., Stephan, B.R. (1996). Results of the IUFRO 1982 Scots pine ( Pinus sylvestris L.) provenance

Open access
Influence of altitude on seed and seedling characteristics in Quercus leucotrichophora A. Camus. ex. Bahadur

References AMRI, E., H. V. M. LYARUU, A. S. NYOMORAL and Z. KAN - YEKA (2008): Effect of timing of seed collection and provenance on seed viability and germination of Dalbergia melanoxylon. Botany Research Journal 1: 82-88. ANDERSEN, U. S., J. P. P. CORDOVA, U. B. NIELSEN and J. KOLLMANN (2008): Provenance variation in germination and seedling growth of Abies guatemalensis Rehder. Forest Ecology and Management 255: 1831-1840. BARTZ, A. E. (1988): One-way Analysis of Variance. In: Basic Statistical Concepts, 3rd

Open access
Genetic parameters and prediction of breeding values in Castanopsis hystrix A.DC. for growth and form traits

on the seedling growth rhythm of Castanopsis hystrix among provenance in Chinese. Forestry science and technology. 26(3): 24-28. ISIK, F., B. LI, B. GOLDFARB and S. MCKEAND (2008): Prediction of wood density breeding values of Pinus taeda elite parents from unbalanced data: A method f or adjustment of site and age effects using common checklots. Ann. For. Sci. 65: 406-418. IWATA, H., T. HAYASHI and Y. TSUMURA (2011): Prospects for genomic select ion in conifer breeding: a simulation study of Cryptomeria japonica. Tree Genet. Genomes

Open access
The Effect of Inbreeding on Early Growth of Acacia mangium in Vietnam

.: Genetic variation in growth of outcrossed, selfed and open-pollinated progenies of Eucalyptus regnans and some implications for breeding strategy. Silvae Genetica 37: 124-131 (1988) HARWOOD, C. E. and WILLIAMS, E. R.: A review of provenance variation in the growth of Acacia mangium. Pp. 22-30 in CARRON, L. T. and AKEN, K. eds.: Breeding Technologies for Tropical Acacias. ACIAR Proceedings No. 37. Canberra: ACIAR (1992) HODGSON, L. M.: Some aspects of flowering and reproductive behaviour of Eucalyptus grandis (Hill) Maiden at J.D.M. Keet

Open access
Seed Source Variation in Cone, Seed and Seedling Characteristic Across the Natural Distribution of Himalayan Low Level Pine Pinus roxburghii Sarg

References ALDHOUS, J. R. (1962): Provenance of Sitka spruce: an account of nursery stage of experiments sown in 1958. In: UK For. Comm. Rep. For. Res., 1960/61, pp. 147-154. ANDERSON, E. (1965): Cone and seed studies in Norway spruce (Picea abies (L.) Karst.) Stud. For. Suecica, No. 23. BACON, G. J., HAWKINS, P. J. and JERMYN, D. (1977): Morphological grading studies with 1-0 slash pine seedlings. Aust. For. 40 (4): 293-303. BAGCHI, S. K., JOSHI, D. N. and RAWAT, D. S. (1990): Variation in seed

Open access
Evaluation of Clonal Variability in Shoot Coppicing Ability and in vitro Responses of Dalbergia sissoo Roxb

Summary

Clonal variations were observed amongst 12 clones of Dalbergia sissoo belonging to four states (U.P, Uttaranchal, Haryana and Rajasthan) of India, representing four different geographical zones in respect of ex vitro shoot coppicing ability and in vitro responses. Coppicing ability of shoot hedges of clones exhibited significant variation which ranged from average of 13.81 coppiced shoots (Clone 40, Uttar Pradesh) to 9.29 (Clone 64, Haryana). Comparative analysis of clones from different regions in respect to their coppicing ability revealed that clones from U.P had higher coppicing ability whereas those from Haryana proved to be least coppicers. Regional variations were also exhibited in the in vitro multiple bud induction ability on nodal explants excised from shoot hedges of clones (mean number of buds induced and percentage of cultures forming multiple buds). Regional as well as inter clonal variations were recorded in the shoot proliferation efficiency as well as rootability of microshoots of these clones as well as their optimal plant growth regulator requirements. BAP alone (2.5 μM) was sufficient for inducing multiple buds on cultured nodal explants of Uttaranchal and Uttar Pradesh region clones. On the contrary, clones from Rajasthan and Haryana had higher optimal requirement of BAP and in addition, they required media to be supplemented with auxin (NAA) for induction of multiple buds on explants. Correlation analysis between shoot coppicing ability of clones and in vitro performances of explants of these clones cultured on 2.5 μM BAP indicates a positive correlation. Observation lays credence to our view that these characters are genetically controlled and shoot coppicing can be used as a marker character in optimizing in vitro performance of clones. Using the information generated by this paper in vitro production of elite planting material can be maximized by ameliorating plant growth regulator requirement in the medium.

Open access