TABLE 3

Estimated number of chromosomal rearrangements and approximate divergence times for various taxa

Species/generaDivergence
time (million yr)
Number of
rearrangementsa
B. rapa-B. oleracea1b5h
B. nigra-B. rapa20b10h
B. nigra-B. oleracea20b12h
A. thaliana-B. nigra35b90i
Lycopersicon-Solanum10c5j
Lycopersicon-Capsicum40c14k
Oryza-Zea66d35l
Sorghum-Zea24e15m
Gossypium spp.10f9n
Homo-Sus93g35o
Sus-Mus114g77o
Homo-Mus114g144p
  • a Estimates based on the method presented by Nadeau and Taylor (1984), except Lycopersicon-Solanum and Gossypium A/D genome comparisons, which were direct counts from published data (Tanksley et al. 1992; Reinisch et al. 1994). Recalculations from original publications were performed on some data (Whitkus et al. 1992; Ahn et al. 1993; Prince et al. 1993; Lagercrantz and Lydiate 1996).

  • b R. Price (personal communication).

  • c Paterson et al. (1996).

  • d E. Kellogg, (personal communication).

  • e Gaut and Doebley (1997).

  • f Wendel (1989).

  • g Janke et al. (1994).

  • h Lagercrantz and Lydiate (1996).

  • i This study.

  • j Tanksley et al. (1992).

  • k Prince et al. (1993).

  • l Ahn et al. (1993).

  • m Whitkus et al. (1992).

  • n Reinisch et al. (1994).

  • o Johansson et al. (1995).

  • p Copeland et al. (1993).