597 potato varieties or lines from 6 provinces of China were tested over 4 years for their resist-mace to soft rot(Erwinia spp.).The hypothesis that there are two independent types of resistance in potatotubers to soft rot,one to wound infection,the other to lenticel invasion,is confirmed.And furthermore,theresistance to lenticel infection is divided into two parts,i.e.resistance to invasion and to spread.Some varie-ties with two types of resistance e.g.Murlur,Diamant,Jnongtvia,Gaoyuan 4,and so on,have been...
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