Stability and Broad-Sense Heritability of Mineral Content in Potato: Calcium and Magnesium
2012
Brown, C. R. | Haynes, K. G. | Moore, M. | Pavek, M. J. | Hane, D. C. | Love, S. L. | Novy, R. G. | Miller Jr., J. C.
Calcium and magnesium are two minerals that play prominent roles in animal and plant metabolism. The purpose of this study was to determine if genetic variation exists among advanced potato breeding clones for tuber calcium and magnesium content and the extent of genotype x environment interactions on these two traits. Ten, 13, and 13 clones were evaluated in the Tri-State, Western Regional, and Western Regional Red/Specialty Trials, respectively. Tuber calcium content ranged from 266 to 944 μg-g−1 DW; magnesium from 787 to 1,089 μg-g−1 DW. Genotype x environment interactions were significant in all trials. However, only the Tri-State for calcium and the Western Regional Red/Specialty trials for both minerals displayed a significant source of variation for genotypes. Broad-sense heritabilities for tuber calcium content were 0.65, 0.37 and 0 in the Tri-State, Western Regional, and Western Regional Red/Specialty Trials, respectively. Broad-sense heritabilities for tuber magnesium content were 0.57, 0, and 0.72 in the Tri-State, Western Regional, and Western Regional Red/ Specialty Trials, respectively. Potato is not a rich source of either calcium or magnesium for the human diet, but genetic variation exists among potato clones that might be useful for plant health.
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