Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii x P-caribaea hybrid families
Data(s) |
01/01/2005
|
---|---|
Resumo |
Genetic control of adventitious rooting was characterised in two unrelated Pinus elliottii x P. caribaea families, an outbred F-1 (n = 287) and an inbred F-2 ( 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 F-1 had a higher rooting percentage (mean +/- SE; 59 +/- 1.9%) and biomass (mean +/- SD; 0.41 +/- 0.24 g) than clones in the inbred F-2 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 F-1 0.62 +/- 0.03 and inbred F-2 0.68 +/- 0.02 (H-2 +/- SE)) and the moderate-to-high genetic correlations amongst the three settings. For root biomass, clonal repeatabilities for both families were lower (outbred F-1 0.35 +/- 0.09 and inbred F-2 0.44 +/- 0.10 (H-2 +/- 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. |
Identificador | |
Idioma(s) |
eng |
Publicador |
EDP Sciences |
Palavras-Chave | #Forestry #Genetic Variation #Clonal Repeatability #Rooted Cutting #Rooting Percentage #Biomass #Forest Tree #Growth #Heritability #Populus #Ability #Traits #C1 #300602 Tree Improvement (Selection, Breeding and Genetic Engineering) #620302 Softwood plantations |
Tipo |
Journal Article |