Claim · model-written summary
Broom frequency varied widely among clones, from 22 to 100%.
Theobroma cacaoNot reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resistance to witches' broom disease (WB) in cocoa”
e1“Seedling BF was approximately 100%, whereas this parameter varied widely for clones (22 to 100%)”
Title
Surendra Surujdeo-Maharaj; Pathmanathan Umaharan; Albertus Eskes; et al. Agritrop (Cirad) 2009
Other claims from this paper (18)
- Observation Clones and seedling progenies differed significantly in incubation period and broombase diameter.
- Observation Average infection frequency and broom frequency were high in the agar-droplet test.
- Observation Seedling broom frequency was approximately 100%.
- Association Broombase diameter was negatively correlated with incubation period among clones (r = -0.68).
- Association Broombase diameter was positively correlated with infection frequency among clones (r = 0.62).
- Association Infection frequency and incubation period were not significantly correlated (r = -0.22).
- Association Broombase diameter was correlated with field levels of resistance (r = 0.71) for 14 clones in screen houses.
- Association The correlation between infection frequency and field resistance was lower (r = 0.42) but still significant.
- Association Incubation period was not correlated with field results (r = -0.16) for 14 clones.
- Association Mid-parental values showed a strong linear relationship with progeny means for broombase diameter (r2 = 0.85).
- Association Mid-parental values showed a strong linear relationship with progeny means for incubation period (r2 = 0.78).
- Observation Additive effects were confirmed in the combined NCII design analyses.
- Observation The effect of dominance was not significant in the combined NCII design analyses.
- Observation Variation for IP and BBD within cross progenies was continuous and normally distributed.
- Mechanism Resistance in vegetative tissue to witches' broom is polygenic in nature.
- Observation Transgressive segregation is present within many seedling families.
- Recommendation Individual plant selection within crosses among resistant parents is suggested to accumulate resistance genes.
- Recommendation Broombase diameter is an important trait for selection for witches' broom resistance.