Table 1.

Year wise total variance for all the three traits (±s.e.).

Year	Number of breeding lines	Total variance
		Total tuber yield	Marketable tuber yield	Late blight resistance (AUDPC)
2000	18	2355.56 ± 8.68	2873.88 ± 6.97	-
2001	19	2867.65 ± 9.91	2203.17 ± 7.96	-
2002	35	4638.53 ± 11.51	5141.23 ± 12.12	-
2003	21	2747.53 ± 11.44	2148.03 ± 10.11	16671.08 ± 28.18
2004	31	6570.35 ± 14.56	5654.12 ± 13.51	29828.01 ± 31.02
2005	29	3249.40 ± 10.59	2761.95 ± 7.79	109018.88 ± 61.31
2006	32	2820.61 ± 7.54	2196.34 ± 6.11	38800.84 ± 34.82
2007	31	2806.20 ± 7.63	2607.38 ± 7.20	17759.80 ± 23.94
2008	31	2870.62 ± 2.46	2162.30 ± 2.29	40949.78 ± 36.34
2009	46	4236.64 ± 9.60	2600.10 ± 7.52	-
2010	53	3109.14 ± 7.66	2439.46 ± 5.21	43550.97 ± 28.67
2011	23	2168.61 ± 7.13	2392.98 ± 4.13	32082.35 ± 37.35
2012	24	2852.65 ± 6.62	2557.59 ± 4.82	303460.62 ± 112.45
2013	32	2278.95 ± 8.44	2136.77 ± 5.96	90855.46 ± 53.29
2014	34	2624.60 ± 6.91	6486.56 ± 7.90	92913.52 ± 52.28
2015	56	2707.42 ± 5.52	2605.67 ± 3.29	61739.91 ± 33.20
2016	35	4238.75 ± 11.00	2800.66 ± 8.95	244382.98 ± 83.56
2017	35	4546.55 ± 11.40	2254.00 ± 8.02	256896.56 ± 85.67
2018	34	4514.90 ± 11.52	4045.33 ± 10.91	88932.38 ± 51.14