Table 2.
Diagnosis of CLas infection and evaluation of severity level of HLB disease among control varieties and F1 progenies.
| Hamlin | Navel | Argentina | Flying-dragon | Large-flower | Pomeroy | Rich 16-6 | Rubidoux | Volkamer | Progenies | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sweet orange | Sweet orange | Trifoliate orange | Trifoliate orange | Trifoliate orange | Trifoliate orange | Trifoliate orange | Trifoliate orange | Rootstock | Hybrids | ||
| CLas | 2015 | 83.3% | 89.3% | 25.0% | 8.3% | 15.6% | 22.9% | 8.3% | 25.0% | 78.1% | 79.8% |
| infectiona | 2016 | 94.4% | 100.0% | 15.0% | 7.6% | 27.9% | 33.5% | 12.9% | 25.0% | 80.0% | 87.4% |
| Foliar | 2015 | 4.1 ± 0.1 | 3.9 ± 0.1 | 1.1 ± 0.1 | 1.7 ± 0.3 | 1.6 ± 0.2 | 1.2 ± 0.1 | 1.4 ± 0.1 | 1.3 ± 0.1 | 2.9 ± 0.1 | 3.3 ± 0.1 |
| symptomb | 2016 | 3.8 ± 0.3 | 3.6 ± 0.2 | 1.4 ± 0.2 | 1.9 ± 0.1 | 1.4 ± 0.1 | 1.4 ± 0.1 | 1.2 ± 0.1 | 1.4 ± 0.1 | 2.3 ± 0.1 | 3.0 ± 0.1 |
| Canopy | 2015 | 3.8 ± 0.3 | 4.5 ± 0.3 | 1.3 ± 0.2 | 2.0 ± 0.3 | 1.3 ± 0.1 | 1.3 ± 0.2 | 1.4 ± 0.1 | 1.5 ± 0.2 | 1.2 ± 0.1 | 2.7 ± 0.1 |
| damageb | 2016 | 3.7 ± 0.3 | 4.4 ± 0.3 | 1.1 ± 0.1 | 2.0 ± 0.3 | 1.3 ± 0.1 | 1.0 ± 0.1 | 1.1 ± 0.1 | 1.1 ± 0.1 | 1.1 ± 0.1 | 2.6 ± 0.1 |
aThe status of CLas infection for all control varieties, indicated with the percentage of HLB-positive trees diagnosed by the TaqMan label-based real-time qPCR, were based on results of replicate trees; but for F1 progenies, were the averaged results of 86 individuals. bThe rating scores and variations for all control varieties, shown as Mean ± SE (n = 8), were based on scores of replicate trees; but for F1 progenies, were the averaged means and variations of 86 individuals.