Host resistance for managing soilborne diseases in strawberry production

Transcription

1 Host resistance for managing soilborne diseases in strawberry production Kelly Ivors Horticulture & Crop Science Cal Poly Strawberry Center & Gerald Holmes Cal Poly Strawberry Center 1

2 NEXT GENERATION DISEASE RESISTANCE BREEDING 1 = highest priority; 2 = medium priority; 3 = lowest priority; N = non-priority. SD = short-day, DN = day-neutral, and NP = nursery production. R-gene = resistance gene, QTL = large-effect quantitative trait locus, complex = polygenic, complex genetics, and? = unknown or hypothesized. 2

3 Fields infested on the campus of Cal Poly: Macrophomina phaseolina Verticillium dahliae 3

4 Field infested at the Monterey Bay Academy: Fusarium oxysporum f.sp. fragariae 4

5 Cal Poly Trials 6 breeding programs 90 genotypes 30 cultivars 60 elite selections 5

6 Fields infested on the campus of Cal Poly: Macrophomina phaseolina 6

7 MACROPHOMINA TRIAL March 1,

8 MACROPHOMINA TRIAL August 1,

9 MACROPHOMINA CROWN ROT SUSCEPTIBILITY 9

10 MACROPHOMINA CROWN ROT SUSCEPTIBILITY Monterey: 69% dead 10

11 MACROPHOMINA CROWN ROT SUSCEPTIBILITY Albion: 52% dead 11

12 MACROPHOMINA CROWN ROT SUSCEPTIBILITY Portola: 40% dead 12

13 MACROPHOMINA CROWN ROT SUSCEPTIBILITY San Andreas: 27% dead 13

14 MACROPHOMINA CROWN ROT SUSCEPTIBILITY UF UC PS PL LC DR 14

15 Fields infested on the campus of Cal Poly: Macrophomina phaseolina Verticillium dahliae 15

16 VERTICILLIUM TRIAL March 21,

17 VERTICILLIUM TRIAL July 15,

18 VERTICILLIUM WILT SUSCEPTIBILITY 18

19 VERTICILLIUM WILT SUSCEPTIBILITY Monterey: 26% dead 19

20 VERTICILLIUM WILT SUSCEPTIBILITY Albion 10% dead 20

21 VERTICILLIUM WILT SUSCEPTIBILITY San Andreas: 8% dead 21

22 VERTICILLIUM WILT SUSCEPTIBILITY UF UC PS PL LC DR 22

23 VERTICILLIUM TRIAL 2015 San Andreas Albion Portola Monterey 23

24 Field infested at the Monterey Bay Academy: Fusarium oxysporum f.sp. fragariae 24

25 FUSARIUM TRIAL

26 FUSARIUM TRIAL

27 FUSARIUM TRIAL 2015 March 20, 2015 This is a map of Rep I in the MBA variety trial, where the soilborne fungus Fusarium oxysporum f. sp. fragariae is established. Each area surrounded by black lines represents one bed of a different strawberry cultivar (cultivar name listed at the top of each bed). Light orange color = leaf necrosis; burnt orange color = dead strawberry plant. 27

28 FUSARIUM TRIAL 2015 May 15, 2015 This is a map of Rep I in the MBA variety trial, where the soilborne fungus Fusarium oxysporum f. sp. fragariae is established. Each area surrounded by black lines represents one bed of a different strawberry cultivar (cultivar name listed at the top of each bed). Light orange color = leaf necrosis; burnt orange color = dead strawberry plant. 28

29 FUSARIUM TRIAL 2015 July 23, 2015 This is a map of Rep I in the MBA variety trial, where the soilborne fungus Fusarium oxysporum f. sp. fragariae is established. Each area surrounded by black lines represents one bed of a different strawberry cultivar (cultivar name listed at the top of each bed). Light orange color = leaf necrosis; burnt orange color = dead strawberry plant. 29

30 FUSARIUM TRIAL 2015 Percent Mortality on July 23, 2015 Sweet Ann Monterey Radiance Albion Sabrina Grenada Sensation Winterstar Ventana San Andreas Festival Portola Safari Fronteras Petaluma

31 FUSARIUM TRIAL 2015 Percent Mortality on July 23, 2015 Sweet Ann Monterey Radiance Albion Sabrina Grenada Sensation Winterstar Ventana San Andreas Festival Portola Safari Fronteras Petaluma Monterey: 75% dead

32 FUSARIUM TRIAL 2015 Percent Mortality on July 23, 2015 Sweet Ann Monterey Radiance Albion Sabrina Grenada Sensation Winterstar Ventana San Andreas Festival Portola Safari Fronteras Petaluma Albion: 53% dead

33 FUSARIUM TRIAL 2015 Percent Mortality on July 23, 2015 Sweet Ann Monterey Radiance Albion Sabrina Grenada Sensation Winterstar Ventana San Andreas Festival Portola Safari Fronteras Petaluma San Andreas: 4% dead

34 FUSARIUM TRIAL 2015 Percent Mortality on July 23, 2015 Sweet Ann Monterey Radiance Albion Sabrina Grenada Sensation Winterstar Ventana San Andreas Festival Portola Safari Fronteras Petaluma Portola: 2% dead

35 CULTIVAR EVALUATION TABLE 35

36 CONCLUSIONS High levels of resistance Wide range of susceptibility in germplasm Strawberry Center to continue host resistance screening for additional diseases 36

37 THANKS TO 37