Dakota Diamond

Rio Grande Russet

Developed By: Colorado State University and USDA-ARS, Aberdeen, ID

Parentage: Butte x A8469-5; seedling AC89536-5RU

Plant Variety Protection: Application in progress

Years in Wisconsin Trial: 2005, 2002, 2001

Overall Tuber Appearance: FAIR to GOOD

General Comments: very nice appearance at Hancock site

Tuber Appearance, 2005:

Skin Color and Texture:

medium brown color with medium to heavy russet; color can be slightly variable; russet can be slightly to moderately variable

Shape:

oblong/long to long in length; oblong to oblong/flattened in cross section; tapered to tapered/blocky ends; shape can be moderately variable

Tuber Texture:

eyes are shallow; bud and stem ends are smooth; overall tuber texture is smooth to slightly rough

External Tuber Defects, 2005:

Antigo:

none noteworthy

Hancock:

minor stolons attached

Spooner:

minor stolons attached; moderate surface scab

Internal Defects, 2005:

Antigo:

none noteworthy (50% hollow heart in 2002)

Hancock:

30% hollow heart (50% hollow heart in 2002; 10% hollow heart in 2001)

Spooner:

10% hollow heart (25% hollow heart in 2002; 65% hollow heart in 2001)