Agronomic species

   Body weight in cattle

65

   Milk yield in cattle

35

   Back-fat thickness in pig

70

   Litter size in pig

  5

   Body weight in chicken

55

   Egg weight in chicken

50

Natural species

   Bill length in Darwin’s finch

65

   Flight duration in milkweed bug

20

   Plant height in jewelweed

  8

   Fecundity in red deer

46

   Life span in collared flycatchers

15

Source: D. F. Falconer and T. F. C. Mackay, Introduction to Quantitative Genetics, Longman, 1996; J. C. Conner and D. L. Hartl, A Primer in Ecological Genetics, Sinauer, 2004.