Table 3.
dsRNA treatment | Average (5 replicates per treatment) | qRT-PCR % knockdown (average 3 replicate reactions) | |||||||
Treatment | R. microplus target BmiGI2 ID | D. mel homologue | Tick survival (days) | Egg output (g) | Egg morphology (see Figure 6) | Days from laying to larval hatch | % larval hatch | Viscera (adult ticks) | Eggs |
dsRNA control (MEGAScript) | NA* | NA* | 16.4 | 0.118 | normal | 26.9 | 69.8 | ||
PBS injection | NA* | NA* | 15.0 | 0.107 | normal | 26.5 | 62.0 | ||
No injection | NA* | NA* | 14.8 | 0.128 | normal | 27.1 | 64.9 | ||
Actin | TC12168 | NA* | 16.2 | 0.134 | normal | 26.3 | 65.8 | ||
Proteasome and ubiquitin | TC6372 | Ubiquitin-63E | 10.0 | 0.010 | deformed | NL± | 0.0 | 95.6 | ND§ |
TC9852 | Proteasome 26S subunit ATPase | 17.0 | 0.116 | deformed | NL± | 0.0 | 98.0 | 76.0 | |
TC10417 | Rpt 1 | 16.4 | 0.130 | normal | 26.2 | 65.1 | 94.0 | ND§ | |
TC13930 | Tat-binding protein-1¶ | 16.4 | 0.127 | slow development | 32.9 | 0.4 | 99.0 | 76.0 | |
Ribosome and protein synthesis | TC5762 | string of perls¶ | 17.6 | 0.129 | deformed | NL± | 0.0 | 99.9 | 100.0 |
TC9037 | Ribosomal Protein L11 | 14.4 | 0.110 | deformed | NL | 0.0 | 21.3 | 98.9 | |
TC12306 | Ribosomal protein L8 | 17.0 | 0.094 | deformed | NL± | 0.0 | 99.2 | ND§ | |
TC12393 | Ribosomal protein S13 | 16.6 | 0.135 | deformed | NL± | 0.0 | 99.0 | ND§ | |
DNA binding | TC6116 | Histone H3.3A | 15.8 | 0.114 | slow development | 30.7 | 3.1 | 97.6 | 100.0 |
TC12182 | Histone H3.3A | 16.4 | 0.121 | normal | 27.8 | 35.2 | 99.2 | 94.7 | |
#LSD (P = 0.05) | 2.1 | 0.029 | 1.3 | 17.7 |
*NA (not applicable) – control injections (no dsRNA treatment and R. microplus actin control)
± NL (no larvae) indicates no larvae hatched
§ ND (not done) indicates insufficient total RNA to undertake RT-PCR due to poor egg output.
¶ Tat-binding protein 1 had a nil z score in the D. melanogaster study and string of perls had a z score <3 [43]
#LSD = least significant difference values