Lynn M. Moore1
(Partners: New Brunswick Seed Potato Growers Association and New Brunswick Potato Agency)
Abstract: Century Russet was compared with an early maturing clone of the same variety in field trials in New Brunswick during 1997 and 1998. Although yield differences were not significant, the regular clone tended to out- yield the early clone in Total yield, Canada No.1, Interprovincial and size categories less than 2.75". The early clone tended to out-yield the regular one for greater than 2.75" tubers including the Chef and Large size categories . Tuber number also did not differ greatly. The early clone produced significantly fewer tubers than the regular clone in the Canada No.1, Interprovincial and 2.25-2.75" size categories during one of the two years. This did not result in a difference in average tuber weight. No differences were noted between the clones concerning roughs, knobs, sunburn, hollow heart or growth cracks. Both clones had a specific gravity of 1.074. Both were susceptible to PVY, producing clear mosaic symptoms.
1Potato and Horticulture Branch, NBDARD, Fredericton, NB E3B-5H1