{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T18:23:10Z","timestamp":1785435790503,"version":"3.56.0"},"reference-count":88,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2026,5,23]],"date-time":"2026-05-23T00:00:00Z","timestamp":1779494400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Research, Innovation and Digitization, CNCS\/CCCDI\u2014UEFISCDI","award":["PN-IV-P8-8.1-PRE-HE-ORG-2025-0276"],"award-info":[{"award-number":["PN-IV-P8-8.1-PRE-HE-ORG-2025-0276"]}]},{"name":"National Institute for Research and Development in Forestry \u201cMarin Dr\u0103cea\u201d","award":["FORCLIMSOC-PN23090303"],"award-info":[{"award-number":["FORCLIMSOC-PN23090303"]}]},{"award":["FORCLIMSOC-PN23090303"],"award-info":[{"award-number":["FORCLIMSOC-PN23090303"]}],"id":[{"id":"https:\/\/ror.org\/016mz1226","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Plants"],"abstract":"<jats:p>The genetic parameters at 6, 9 and 12 years were studied in two progeny trials (one half-sib and one full-sib) of silver fir (Abies alba Mill.) in Romania, in order to establish an appropriate breeding strategy for advancing second-generation seed orchards. The half-sib trial (HS) consists of 60 open-pollinated families of plus trees from four first-generation seed orchards, while the full-sib trial (FS) consists of 51 half-diallel crosses of 11 plus trees from one seed orchard. Tree height and diameter were found to be under moderate to strong genetic control at both the family and individual levels. Total height showed a higher percentage of additive genetic variance than diameter in both types of progenies. Additive genetic variances increased with age for the diameter (from 12% to 36%), while for the total height, it decreased (from 76% to 35%). In the HS trial, family heritability was higher than individual heritability for both traits. The highest values of heritability were obtained for total height, both at the individual (0.76\u20130.35) and family levels (0.88\u20130.63). In FS progenies, the estimates of the narrow-sense individual heritability were lower than those at the family level and remained almost constant over time. The additive age-age genetic correlations and genetic correlations among growth traits were more stable and stronger in FS progeny than in HS progenies. Expected genetic gains were calculated at individual and family levels for different breeding strategies. The highest genetic gain will be obtained through selection of the best parents. Genetic gain slightly varied over age and for progeny tests. The level of genetic diversity, calculated for selected parents based on the breeding values, was high, while the inbreeding coefficient reduced. Combining the backward selection strategy with SSR analyses allows optimization for seed orchard design in order to mitigate inbreeding depression risks and enhance genetic diversity in the next breeding generation.<\/jats:p>","DOI":"10.3390\/plants15111603","type":"journal-article","created":{"date-parts":[[2026,5,25]],"date-time":"2026-05-25T00:30:33Z","timestamp":1779669033000},"page":"1603","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Advanced Generation Seed Orchard of Abies alba Mill. in Romania Combining Genetic Gain and Diversity"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3751-8412","authenticated-orcid":false,"given":"Georgeta","family":"Mihai","sequence":"first","affiliation":[{"name":"Department of Forest Genetics and Tree Breeding, \u201cMarin Dr\u0103cea\u201d National Institute for Research and Development in Forestry, 077190 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2437-1610","authenticated-orcid":false,"given":"Alin-Madalin","family":"Alexandru","sequence":"additional","affiliation":[{"name":"Department of Forest Genetics and Tree Breeding, \u201cMarin Dr\u0103cea\u201d National Institute for Research and Development in Forestry, 077190 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Teodosiu","sequence":"additional","affiliation":[{"name":"\u201cMarin Dr\u0103cea\u201d National Institute for Research and Development in Forestry, C\u00e2mpulung Moldovenesc Station, 73 bis, Calea Bucovinei, 725100 C\u00e2mpulung Moldovenesc, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emanuel","family":"Stoica","sequence":"additional","affiliation":[{"name":"Department of Forest Genetics and Tree Breeding, \u201cMarin Dr\u0103cea\u201d National Institute for Research and Development in Forestry, 077190 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paula","family":"Garbacea","sequence":"additional","affiliation":[{"name":"Department of Forest Genetics and Tree Breeding, \u201cMarin Dr\u0103cea\u201d National Institute for Research and Development in Forestry, 077190 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lavinia","family":"Ifrim","sequence":"additional","affiliation":[{"name":"Department of Forest Genetics and Tree Breeding, \u201cMarin Dr\u0103cea\u201d National Institute for Research and Development in Forestry, 077190 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,23]]},"reference":[{"key":"ref_1","unstructured":"Wolf, H. 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