Total genomic DNA was extracted from four sources: pollen
grains from CSSV-infected Amelonado cocoa trees (T2 and T4),
CSSV-free Amelonado cocoa tree (H), component parts of seeds
from cocoa trees (testa, cotyledon and embryo) and needle leaves
from cocoa seedlings. A slightly modified DNeasy TM 96 Plant kit
(Qiagen Ltd., UK) protocol was used. Buffer AP1 (400l) preheated
to 65 ◦C to dissolve and 2l of RNase was added to the Eppendorf
tubes containing the experimental materials and shaken with
a tungsten pellet on a Retsch disrupter for 1.4min×2 at 25 cycles
per second.DNAextraction quality fromthe experimentalmaterials
was checked on an ethidium bromide-stained agarose gel.