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Genetic Variability and Early Growth Performance of Eucalyptus tereticornis Sm. in Provenance cum Progeny Trials in India

Abstract

Results of provenance cum progeny trials of Eucalyptus tereticornis Sm. laid out in 2002 at three sites viz. FRI Campus (Uttaranchal), Chiryanpur (Uttaranchal) and Midnapore (West Bengal) located in tropical region of India are reported and discussed. Thirteen provenances representing 91 families from Australia and Papua New Guinea (PNG) viz. Oro bay to Emo, PNG; Sirinumu Sogeri Plat, PNG; Warwick, QLD; Yurammie, SF, NSW; Buckenbowra SF, NSW; Selection flat SF559, NSW; Credition SF, QLD; Cardwell, QLD; Mitchell River MT Molloy, QLD; Mill stream archer creek, QLD; Helenvale, QLD; Walsh River, QLD; Burdekin River, QLD were evaluated from nursery stage to field performance (age 21months). As a local seed source open-pollinated seeds collected from selected interspecific Eucalyptus F1 hybrid trees of FRI-4, FRI-5 and Mysore gum (Eucalyptus teretirornis) were used to serve as check material (control). Significant differences between the provenances and families at age 21 months were observed for height, clean stem length, collar diameter and field survival. Significant provenance x site interaction was observed for height. In general the north Queensland provenances performed better and in particular two provenances viz. Walsh River, QLD and Burdekin River, QLD ranked the best in comparison to others at this age. Results indicate that significant genetic differences exist between the families and provenances of E. tereticornis. The growth traits were inter-correlated with each other. Geographic clinal variation pattern was observed in some of the growth traits viz. height, clean stem height and collar diameter. There were fair differences between phenotypic and genotypic coefficient of variability. Heritability (narrow sense) values were fairly good for height and clear stem length in comparison to collar diameter. The relative performance of the provenances was fairly consistent throughout test sites.

Open access
Performance of Maritime Pine Spanish Mediterranean Provenances at Young Ages in a Transitional Region Between Atlantic and Mediterranean Climates in NW Spain

Abstract

Maritime pine (Pinus pinaster Ait.) occurs naturally in a wide variety of sites around SW Europe, from typical Mediterranean climates to areas in Northern Spain and France with a strong oceanic influence. Within its distribution range populations are strongly differentiated, showing local adaptations to environmental conditions that have been widely documented in different provenance trials both in the Atlantic region and in the Mediterranean area. In the present paper, we analyzed the performance of six Mediterranean provenances in three sites in the interior of Galicia (NW Spain), a transitional region between Atlantic and Mediterranean climates where few catalogued materials are available for reforestation. Seven year after planting, provenances coming from the mildest climates grew faster but showed inferior stem form. The provenance x site interaction was weak, although some significant provenance rank changes were observed in the driest site. Among the tested provenances, Serranía de Cuenca showed good early growth in all sites and acceptable stem form, being thus a potential recommended material for using in the area. The Albarracín origin showed also good results, with excellent stem form and acceptable growth, especially in the driest site. A combined spatial analysis allowed us to compare the tested provenances with improved materials from Coastal Galicia (NW Spain) and Western Australia planted in adjacent progeny trials. Although the differences were small, the Atlantic material of both breeding programs performed slightly better than the Mediterranean provenances, and represents another alternative material for use in reforestation in this transitional climate region.

Open access