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Inbreeding depression in Eucalyptus tereticornis Sm. due to cleistogamous flowering

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Abstract

A provenance cum progeny trial comprising 13 provenances and 91 families of Eucalyptus tereticornis Sm. of Australian and Papua New Guinean (PNG) origin was laid out in India in 2002. In one family emanating from CSIRO seed lot no. 13418, (tree no. DS000141) Sirinumu Sogeri Plat, PNG cleistogamy was observed earlier. This trait appears to be under genetic control, and presumably results in obligate selfing. In the present study, the effect of forced selfing, was examined in this family after 48 months of field planting. Severely depressed seed set, germination percent, field growth and survival in relative comparison to other out crossing families was noticed. Inbreeding depression was noticed in growth traits viz. height, clean stem height, DBH, branching and survival per cent, which increased with age. High coefficient of variation was observed in family bearing cleistogamous flowers than the other predominantly out-crossed families.

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Acknowledgments

The author is grateful to Dr. Chris Harwood, Australian Seed Center, CSIRO, Canberra, Australia for providing seed lots of Eucalyptus tereticornis for conducting the experiments.

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  1. Division of Genetics and Tree Propagation, Forest Research Institute, P.O. IPE Kaulagarh Road, Dehradun, 248195, Uttarakhand, India

    H. S. Ginwal

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  1. H. S. Ginwal
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Correspondence to H. S. Ginwal.

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Ginwal, H.S. Inbreeding depression in Eucalyptus tereticornis Sm. due to cleistogamous flowering. New Forests 40, 205–212 (2010). https://doi.org/10.1007/s11056-010-9194-z

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