1405-3195 1405-3195 S1405-31952007000400417 Mexico Mexico 00 06 2007 00 06 2007 41 4 417 423

1966 8 115-8 1995 172 117-22 1997 95 325-36 2005 162 970-6 2002 53 473-81 CIAT (International Center for Tropical Agriculture) 1987 48-52 2000 156 640-4 1998 133 139-44 2002 116 293-8 1990 93 1219-25 1990 181 399-405 1997 35 227-39 1997 48 75-91 1997 48 1461-8 1998 116 91-9 2000 160 1-13 2001 237 225-37 1991 30 1165-71 1995 889 2001 52 329-39 2004 38 131-9 2001 52 1083-91 1996 47 185-214 1993 31 223-31 1994 79 663-7 1991 95 1089-95