Table 1 Yield advantage over checks of some of the new varieties from the four successful cross combinations under local farming conditions
From: Plant breeding can be made more efficient by having fewer, better crosses
Country and cross number (see Table4) | Comparison made: new variety versuscheck | Yield advantage on-farma | Yield advantage on-farm over local varietiesb |
|---|---|---|---|
Nepal (cross 1) | Barkhe 3004 versus Mansuli | 2003 to 2005: 19% more: 0.65 ± 0.46 t ha-1 (n=18) [5] | 2005: 44% more: 1.5 ± 0.20 t ha-1 (n=23) [5], Additional file 1] |
India (cross 1) | Ashoka 200F, Ashoka 228 versus Birsa Gora 102 | 2000 to 2001: 54% more: 0.5 ± 0.1 t ha-1 (n=40) [6] | 2001: 35% more: 0.41 ± 0.15 t ha-1 (n=198) [6] |
Bangladesh (cross 2) | Judi 582 versus Swarna, BRRIdhan 32, BRRIdhan 39 | 2002 to 2004: 44% more: 1.0 ± 0.2 t ha-1 (n=22) [7] | 2003 to 2005: 21% more: 0.49 ± 0.14 t ha-1 (n=61) [7] |
Nepal (cross 3) | Sunaulo Sugandha (aromatic) versus Mansuli (non aromatic) | 2002 to 2004: 6% more: 0.16 t ha-1 (n.s.) (n=36). 1.07 t ha-1 more than aromatic varieties (n = 9) [8] | 2004 to 2006: 15% more: 0.54 t ha-1 (n = 101) [8], Additional file 2] |
India (cross 3) | Sugandha 1 versus IR64 | 2003 to 2007: 14% more: 0.42 ± 0.14 t ha-1 (n=69) | 2007: 26% more: 1.1 ± 0.14 t ha-1 (n=4) |
Nepal (cross 5) | Madhyam Dhan 0742 versus Mansuli | 2008 to 2011: 26% more: 1.0 ± 0.2 t ha-1 (n=101) | Data not yet available |