Báo cáo lâm nghiệp: "Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii × P caribaea hybrid families" pptx

... effect of decapitation and heavy pruning of ortets on the subsequent rooting of cuttings of Pinus caribaea var. hondurensis, in: Gibson G.L., Griffin A.R., Matheson A.C. (Eds.), Breeding Tropical ... 10.1051/forest:2005036 Original article Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii × P. caribaea hybrid fami...

Ngày tải lên: 08/08/2014, 00:22

... selection intensity of one in ten, genetic gains of up to 10% per breeding cycle are possi- ble. These gains can be interpreted as the change in population mean that could be achieved by selection in ... in practice the selection method may be different, these gains provide some indication of the change possible in the population, from a selection intensity of only 10%. Pre-...

Ngày tải lên: 07/08/2014, 16:20

... based on comparing the composition of herb species within three groups of relevés. e groups are created with reference to the proportion of Picea abies in tree layers on the sampling plot. ... calculations and graphical interpre- tation in STATISTICA 7.1 (StatSoft Inc. 2005). RESULTS AND DISCUSSION Comparison of designed spruce proportion relevé groups using fidelity yield...

Ngày tải lên: 07/08/2014, 10:21

... found positive on plot M only. Fig. 5 illustrates the in uence of cutting on changes in the species composition of natural regeneration in comparison with the parent stand. e more inten- sive ... shelterwood cuttings (plots L, M, H), one plot was clear-cut (CC), and one was left without intervention – as a control (C). e number of one-year-old seedlings decreased propor...

Ngày tải lên: 07/08/2014, 10:22

... branch inclination, petiole length, leaf phyllotaxy, size and shape) that in uence light interception and foliage clumping in dense two- year-old monoclonal poplar (Populus spp.) coppice crops were ... with previous work re- porting that productive poplar plants in wide spacings produce more growth later in the season than did those in dense spac- ings as a result of a larger prop...

Ngày tải lên: 07/08/2014, 16:21

... selecting the clones to be recombined to produce the next generation population can be made on the basis of the clone effect estimations reported in the present pa- per. The determination of the ... the species is now increasingly planted in Europe, both in afforestation of abandoned farmland and enrichment of forests [26]. In Gali- cia (NW Spain) a long term breeding program...

Ngày tải lên: 07/08/2014, 16:20

... oscillation is most of the time synchronized with FXc drop. Their duration, linked to the damping system, is depending on cutting con- ditions (cutting speed, clearance angle value) and on device mechanical ... considered as an interrupted process, with each crack propagation phase constituting an excitation of the system. As it was suggested by Franz [8] concerning routing (modelized...

Ngày tải lên: 07/08/2014, 16:21

... were observed only in the upper semi-arid. The percentage of polymorphic loci per primer (P r ) ranged from 66.67 (OPJ08) to 100% (OPJ04 and OPJ20). Average polymorphisms within populations ranged ... and population structure in order to avoid wrong conclusions for rational use of species [28,46]. In this paper, we investigate the genetic variation of six nat- ural Tunisian myrtl...

Ngày tải lên: 07/08/2014, 16:21

... the proportion of latewood for radiata pine was less than 20%, which would not have any marked influence on papermaking properties. Zonel and Jett [41] reported that the proportion of latewood in ... families (full- and half-sibs) or genotypes (clones) will systematically increase in the future. Site preparation, pruning, and thinning are part of currently and intensively applied...

Ngày tải lên: 08/08/2014, 00:21

... (Coleoptera: Curculionidae) on Pinus pinaster Ait. was evaluated in a fertilization × progeny test in Galicia (NW Spain) to determine the genetic variation among families and the possibility to include ... pre- sented in a companion paper [51]. The objectives of this study were (i) to determine the level of genetic variation in the susceptibility to pine weevil damage in...

Ngày tải lên: 08/08/2014, 00:22