Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii x P. caribaea hybrid familiesPlumX View Altmetrics View AltmetricsTools Shepherd, M., Mellick, R., Toon, P., Dale, G. and Dieters, M. J. (2005) Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii x P. caribaea hybrid families. Annals of Forest Science, 62 (5). pp. 403-412. ISSN 1286-4560
Article Link: https://doi.org/10.1051/forest:2005036 AbstractGenetic control of adventitious rooting was characterised in two unrelated Pinus elliottii × P. caribaea families, an outbred F1 (n = 287) and an inbred F2 (n = 357). Rooting percentage was assessed in three settings and root biomass was measured on a sub-set of clones (n = 50) from each family in the third setting. On average, clones in the outbred F1 had a higher rooting percentage (mean ± SE; 59 ± 1.9%) and biomass (mean ± SD; 0.41 ± 0.24 g) than clones in the inbred F2 family (mean ± SE; 48 ± 1.8% and mean ± SD; 0.19 ± 0.13 g). Genetic determination for rooting percentage was strong in both families, as indicated by high individual setting clonal repeatabilities (e.g. Setting 3; outbred F1 0.62 ± 0.03 and inbred F2 0.68 ± 0.02 (H2 ± SE)) and the moderate-to- high genetic correlations amongst the three settings. For root biomass, clonal repeatabilities for both families were lower (outbred F1 0.35 ± 0.09 and inbred F2 0.44 ± 0.10 (H2 ± SE)). Weak positive genetic correlations between rooting percentage and root biomass in both families suggested a concomitant gain in root biomass would be insignificant when selecting solely on the more easily assessable rooting percentage.
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