Table 1.
CIP potato programs breeding populations utilized in the study, the main breeding objective of the populations, and the number of genotypes derived from each population and subpopulation
| Breeding population (subpopulation) | Genotypes evaluated | Years of crosses made | Main breeding objective |
|---|---|---|---|
| A | 13 | 1974, 1977, 1980, 1981, 1984, 1987, 1991 | Late blight resistance, adaptation to highlands |
| B1 | 11 | 1999 | |
| B3 (B3C0, B3C1, B3C2) | 100 (2, 51, 47) | 1987, 1989, 1991, 1992, 1993, 1995, 1996 | |
| LB-HT | 37 | 1998 | Late blight resistance, heat tolerance, adaptation to mid-elevation |
| B3-LTVR (intermediate-LT-LB, XY-LB) | 25 (12, 13) | 1996, 2001 | Hybrid population combining late blight resistance, heat tolerance, virus resistance |
| LTVR (LTVR, BW) | 186 (171, 15) | 1979, 1980, 1985, 1988, 1989–2000, 2002–2004, 2009 | Virus resistance, heat tolerance, drought tolerance, salinity tolerance, adaptation to lowlands, bacterial wilt resistance |
| PREBRED | 2 | 1994 | Late blight resistance |
| VARIETY | 6 | NA | Varied |
| Grand total | 380 |