Table 1

Yield advantage over checks of some of the new varieties from the four successful cross combinations under local farming conditions
Country and cross number (see Table4) Comparison made: new variety versus check 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

aIn multiple-entry trials where each on-farm trial is a replicate of a randomized complete block design (plot size > 10 m2) and n = number of trials. All differences are significant from ANOVA except Sunaulo Sugandha versus non-aromatic controls.

bIn single-intervention trials i.e., paired plots with one new variety versus farmer’s best check (plot size > 50 m2) where n=number of trials. All yield differences are significant from ANOVA.

± = standard error.

Witcombe et al.

Witcombe et al. BMC Plant Biology 2013 13:22   doi:10.1186/1471-2229-13-22

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