as a botanical source, variability in chia seed composition could be expected between growing locations, and between years within a location, due to genotype and environment effects as well genetic x environment’s interactions. The objective of the present study was to determine the location effect on the growing cycle length, and seed’s protein content, lipid content, and fatty acid profiles, of a single chia genotype. Seeds of chia genotype Tzotzol grown on eight sites in five different ecosystems were tested. One site was in Argentina, in the Semi-Arid Chaco ecosystem (T
5); one was in Bolivia, in the Sub-Humid Chaco ecosystem (T
4); and six in Ecuador, one in the Coastal Desert (T
3), two on the Tropical Rain Forest (T
2), and three in the Inter-Andean Dry Valley ecosystem (T
1). Seeds from plants grown in T
4 and in T
3 contained significantly (
P <0.05) more protein percentage than did seeds from the other three ecosystems. No significant (
P <0.05) differences in protein content were found between T
3 and T
4, and between T
1, T
2, and T
5. Seeds from T
1 and T
5 ecosystems, with 33.5 and 32.2%, respectively, were the numerically highest oil content producers, but their results were only significantly (
P <0.05) higher when compared with the T
2 seeds. Significant (
P <0.05) differences in palmitic, stearic, oleic, linoleic and α-linolenic fatty acids between oils from seeds grown in different ecosystems were detected, however. Oil of seeds grown in the T
3 ecosystem had the palmitic, stearic and oleic fatty acids’ highest contents. Palmitic and oleic fatty acid levels were significantly (
P <0.05) higher when were compared to that of seeds grown in the T
1 ecosystem, and stearic when was compared to that of seeds grown in the T
5 ecosystem; ω-6 linoleic fatty acid content was significantly (
P <0.05) lower in oils of seeds produced in T
1, and T
2 than in those produced in T
3, T
4, and T
5 ecosystems; ω-3 α-linolenic fatty acid content was significantly (
P <0.05) higher in seeds produced in T
1, than in those produced in T
3, T
4, and T
5, but not in those produced in T
2.
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