Title: VARIATION IN FERTILITY AND ITS IMPACT ON GENE DIVERSITY IN A SEEDLING SEED ORCHARD OF <i>EUCALYPTUS TERETICORNIS</i>
Abstract: Eucalyptus Plantations, pp. 111-127 (2003) No AccessVARIATION IN FERTILITY AND ITS IMPACT ON GENE DIVERSITY IN A SEEDLING SEED ORCHARD OF EUCALYPTUS TERETICORNISMOHAN VARGHESE, NAMASIVAYAM RAVI, SEOG-GU SON, and DAG LINDGRENMOHAN VARGHESEDepartment of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE 901 83, Umea, SwedenInstitute of Forest Genetics and Tree Breeding, Coimbatore - 641002, India, NAMASIVAYAM RAVIInstitute of Forest Genetics and Tree Breeding, Coimbatore - 641002, India, SEOG-GU SONDepartment of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE 901 83, Umea, SwedenKorea Forest Research Institute, Cheongryangri 2-207, Seoul, Korea, and DAG LINDGRENDepartment of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE 901 83, Umea, Swedenhttps://doi.org/10.1142/9789812704504_0010Cited by:3 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Abstract: Impact of fertility variation in a progeny trial of Eucalyptus tereticornis in south India was studied at four years of age with the intention to convert it to a seedling seed orchard. A hypothetical phenotypic selection of 200 trees for tree height resulted in only 18% fertile trees. There was tremendous variation in fertility (sibling coefficient, A=17.4). This would cause excessive representation of the 12 most fertile trees resulting in high genetic drift, inbreeding and low status number (Ns=8.5). Collection of equal quantities of seed per tree would reduce sibling coefficient and almost double the status number in seed crop. Much of the diversity loss occurs in the first generation as indicated by 65% decline in relative status number in the first generation compared to six advanced generations. Retaining 35 additional pollen parents would increase status number and variance effective population size by 100% in the first generation, but reduce gain by 2% compared to the trees selected for genetic merit. Both strategies would reduce inbreeding coefficient in the second generation. Combination of the two - retaining trees for pollination only and limiting the number of seeds harvested from individual trees would reduce impact of fertility variation in seedling seed orchards and be useful as management strategies in domesticating tropical eucalypts. FiguresReferencesRelatedDetailsCited By 3Impact of fertility variation on genetic diversity and phenotypic traits in second generation seed production areas and clonal seed orchards of Eucalyptus camaldulensisP.G. Suraj, K. Nagabhushana, R. Kamalakannan and M. Varghese9 April 2019 | Silvae Genetica, Vol. 68, No. 1Changes in growth performance and fecundity of Eucalyptus camaldulensis and E. tereticornis during domestication in southern IndiaM. Varghese, R. Kamalakannan, C. E. Harwood, D. Lindgren and M. W. McDonald15 May 2009 | Tree Genetics & Genomes, Vol. 5, No. 4Genetic Gain and Gene Diversity Following Thinning in a Half-Sib PlantationA. Fedorkov, D. Lindgren and A. David19 October 2017 | Silvae Genetica, Vol. 54, No. 1-6 Eucalyptus PlantationsMetrics History PDF download
Publication Year: 2003
Publication Date: 2003-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 8
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