"Fugenmaru", a new potato variety

A new potato variety "Fugenmaru"m registered as Norin No.39, was developed from the cross between "Atlantic" and "P-7" in 1997. The crossing was carried out in autumn cropping of 1989 at the Aino Potato Branch of Nagasaki Agricultural and Forestry Experiment Station. The female parent is a U.S. variety used to make potato chips with high quality and resistance to golden nematode (Globodera rostochiensis: pathotype Rol). The male parent is an introduced strain from C.I.P. with resistance to bacterial wilt. After repeated evaluation of the disease and insect pest resistance, productivity and cooking quality from 1990 at the Aino Potato Branch, a promising strain. "Saikai No.26" was selected in 1994. Based on the results of the regional adaptability test conducted at other prefectural experimental stations and at farmer's fields, the strain was found to be superior and was recognized as a new variety for table use, having good appearance, delicious taste and resistance to golden nematode. The strain has been adopted as an admitted variety in Nagasaki prefecture. Main charactersitics of "Fugenmaru" are as follows: 1) Early sprouting, tuber formation and tuber growth for spring cropping, as early as "Dejima" for autumn cropping. 2) Earlier maturity than "Dejima". Short stem legnth. Rare bloossom and white flowrs. 3) Round shape tubers with shallow eyes. Yellow color of the skin and flesh. Littlesecondary growth anmd cracking in tubers. 4) High tuber yield of early harvest and equal in spring cropping, but lower yield in autumn cropping, compared with "Dejima". 5) Good cooking quality as "Dejima". No disintegration during boiling, little enzymatic discoloration after peeling and less darkening after being cooked. High content of starch in spring cropping. 6) Resistant to golden nematode, the first resistant variety for warmer region of Japan