Cold and heat tolerances of hybrids for restoration of the endangered Juglans cinerea L

Table 2 F_V/F_M and standard error (SE) measured on excised leaflets across Juglans cinerea provenances (USDA plant hardiness zones) and Juglans species/hybrids following control temperature (°C) water baths

Species	Temperature	F_V/F_M	SE
Juglans cinerea	30	0.800	0.001
Hardiness zone 4	30	0.800	0.002
Hardiness zone 5	30	0.797	0.004
Hardiness zone 6	30	0.803	0.002
Hardiness zone 7	30	0.800	0.000
Juglans cinerea	42	0.745	0.006
Hardiness zone 4	42	0.731	0.021
Hardiness zone 5	42	0.754	0.012
Hardiness zone 6	42	0.751	0.005
Hardiness zone 7	42	0.738	0.008
Backcross-Jc hybrids	30	0.799	0.004
Backcross-Jc hybrids	42	0.758	0.006
F1 hybrids	30	0.801	0.003
F1 hybrids	42	0.729	0.016
Juglans ailantifolia	30	0.801	0.002
Juglans ailantifolia	42	0.746	0.016

ISSN: 1297-966X