Contrasts showing the individual effect of the w501 mtDNA on longevity in two nuclear backgrounds and all diet conditions.

Significance codes: 0 ‘***’, 0.001 ‘**’, 0.01 ‘*’, 0.05 ‘†’.显著性标记规则：0 对应‘***’，0.001 对应‘**’，0.01 对应‘*’，0.05 对应‘†’。