Stability of expression and concentration of ascorbic acid in North American potato germplasm

被引:28
作者
Love, SL [1 ]
Salaiz, T
Shafii, B
Price, WJ
Mosley, AR
Thornton, RE
机构
[1] Univ Idaho, R&D Ctr, Aberdeen 83210, Scotland
[2] Univ Idaho, Stat Program, Moscow, ID 83844 USA
[3] Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA
[4] Washington State Univ, Dept Hort & Landscape Architecture, Pullman, WA 99164 USA
关键词
Solanum tuberosum; vitamin C; biplot analysis;
D O I
10.21273/HORTSCI.39.1.156
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
Ascorbic acid (vitamin C) is an essential nutrient in the human diet and potatoes are a valuable source. As a first step in breeding for potatoes (Solanum tuberosum L.) with higher levels of ascorbic acid, 75 clones from 12 North American potato-breeding programs were evaluated for concentration, and 10 of those for stability of expression. Trials were grown in Idaho, Oregon, and Washington in 1999 and 2000, tubers sampled, and ascorbic acid quantified. There were significant differences among clones and clone by environment interaction was also significant. Concentration of ascorbic acid of the clones was continuously distributed over a range of 11.5 to 29.8 mg/100 g. A subgroup of 10 clones was analyzed using an additive main effects and multiplicative interaction (AMMI) model, to diagnose interaction patterns and measure clone stability. The first two principal component axes accounted for over 80% of the variability. Bi-plot analysis showed 'Ranger Russet' to be highly unstable across the environments tested. A plot of Tai's stability statistics found six of the 10 clones to be stable for ascorbic acid expression. Appropriate evaluation methods for ascorbic acid concentration must involve multi-year testing.
引用
收藏
页码:156 / 160
页数:5
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