Abstract
1In north-western and west-central sub-tropical plains of India, frost is known to influence the potato productivity by 10-50% depending upon intensity of frost and crop age. Information on frost tolerance is limited in sub-topical plains (Kang et al. 2007, Luthra et al. 2007) and association of frost injury with tuber yield components is lacking in potato. The tuber yield being complex polygenic trait is determined by interactions among various genetic as well as environmental factors. The genetic parameter gives an idea of the genetic advance to be expected from selection for a character (Johnson et al. 1955). Association among different characters helps in selection of better plant type.
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