Table 3 Percentage mortality (± standard error, SE) observed in progenies from different crosses when exposed to 800 µg/ml of V-ATPase subunit A dsRNA in 20-day leaf-feeding bioassays. These mortalities were used to determine the genetics of resistance in CEAS 300.

From: Selection for high levels of resistance to double-stranded RNA (dsRNA) in Colorado potato beetle (Leptinotarsa decemlineata Say) using non-transgenic foliar delivery

Test

Na

Control mortality (%) ± SE

Corrected treatment mortality (%) ± SE

F1 bioassay 1—GC and CEAS 300

GC (♀) × GC (♂)

4

1.7 ± 1.7

56.6 ± 10.0

GC (♀) × CEAS 300 (♂)

4

1.7 ± 1.7

31.7 ± 5.7

CEAS 300 (♀) × GC (♂)

4

1.7 ± 1.7

40.0 ± 7.7

CEAS 300 (♀) × CEAS 300 (♂)

4

1.7 ± 1.7

1.7 ± 1.7

F1 bioassay 2—METT and CEAS 300

METT (♀) × METT (♂)

8

11.7 ± 4.8

100.0 ± 0.0

METT (♀) × CEAS 300 (♂)

4

23.4 ± 1.9

95.6 ± 3.3

CEAS 300 (♀) × METT (♂)

8

8.3 ± 2.1

94.0 ± 2.1

CEAS 300 (♀) × CEAS 300 (♂)

8

4.2 ± 1.7

7.7 ± 1.7

Backcross bioassay—METT, CEAS 300 and F1

METT (♀) × METT (♂)

8

6.6 ± 4.2

98.0 ± 1.7

METT (♀) × F1b (♂)

8

10.8 ± 4.5

73.7 ± 7.2

F1 (♀) × METT (♂)

4

6.7 ± 2.7

96.4 ± 1.9

CEAS 300 (♀) × F1 (♂)

4

0.0 ± 0.0

36.6 ± 4.3

CEAS 300 (♀) × CEAS 300 (♂)

4

5.0 ± 3.2

13.3 ± 9.4

  1. aNumber of biological replicates performed, each consisting of 15 randomly selected larvae.
  2. bF1 generation resulting from crossing METT and CEAS 300.