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Although the potato is a crop that was introduced in India, it has become a staple food and is grown in both the hills and plains. Potato breeding started in India in the 1950 s and has contributed significantly to improving production. However, it is important to ascertain genetic progress in terms of changes in its yield over time. This study used the ‘Era trial’ methodology, wherein 22 potato varieties released in different decades ranging from 1968 to 2012 were evaluated in replicated multi-location trials for three consecutive years (2014–15, 2015–16 and 2016–17) in four potato growing zones of the country. The traits recorded were total tuber yield, marketable tuber yield and tuber dry matter content. Mixed model REML analysis showed significant differences among varieties, environments and variety × environment interaction. Tuber dry matter content showed the least variation among varieties. The highest tuber …