NDLI: Genetic variation in resistance to Phytophthora cinnamomi in seedlings of two Turkish Abies species

Content Provider	Springer Nature Link
Author	Frampton, John Isik, Fikret Benson, D. Michael
Copyright Year	2012
Abstract	Genetic variation in resistance to Phytophthora cinnamomi was investigated for two fir species endemic to the Republic of Turkey. Open-pollinated families of seedlings of Trojan fir (Abies equi-trojani) and Turkish fir (Abies bornmuelleriana) were grown from seed in a greenhouse for approximately 15 months, inoculated with rice grains colonized with P. cinnamomi, and subsequent mortality assessed biweekly for 16 weeks. Final seedling mortality was higher in Trojan fir (56.4 %) compared to Turkish fir (32.9 %). Mortality in both species varied by geographic origin, decreasing from west (59.8 %, ) to east (21.4 %, Karabük). As mortality increased following inoculation, both narrow-sense individual-tree $$ \left( {h_i^2} \right) $$ and family mean $$ ( {h_f^2} ) $$ heritabilities increased, plateauing at 0.62 ± 0.162 and 0.97 ± 0.011 for Trojan fir and 0.50 ± 0.102 and 0.96 ± 0.01 for Turkish fir, respectively. Terminal and lateral branch bud break assessed under greenhouse conditions were also under strong genetic control. For terminal bud break, individual-tree heritabilities for Trojan and Turkish fir were 0.49 ± 0.146 and 0.45 ± 0.099, respectively, while family mean heritabilities were 0.88 ± 0.035 and 0.88 ± 0.027, respectively. The family mean correlation between bud break and final disease mortality was not significant for lateral buds but positive and significant for terminal buds (r = 0.32) suggesting that selection for resistance would either not alter, or slightly reduce, early bud break. These are encouraging results for ongoing tree improvement efforts in North America and Europe to develop planting stock for the Christmas tree industry.
Starting Page	53
Ending Page	63
Page Count	11
File Format	PDF
ISSN	16142942
Journal	Tree Genetics & Genomes
Volume Number	9
Issue Number	1
e-ISSN	16142950
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Abies bornmuelleriana Abies equi-trojani Christmas trees Root rot Trojan fir Turkish fir Forestry Plant Genetics & Genomics Plant Breeding/Biotechnology Tree Biology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Horticulture Forestry

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