New almond selections with high tocopherol concentration
We investigated the tocopherol (vitamin E) content in almonds from the Australian almond breeding program and compared them to the standard cultivar 'Nonpareil' over two seasons. The results showed that as the trees matured from one year to the next, the vitamin E concentration increased. The total average vitamin E concentration was 53.34 mg 100 g-1 in 2014, which was significantly higher than that of 47.82 mg 100 g-1 in 2013. The year variation may be caused by the age difference of the almond trees because the growing conditions in the two years were not significantly different, in terms of water supply and solar exposure. The variation between selections was large: the highest concentration was found in 'AusiD5' (59.90 mg 100 g-1 in 2013 and 67.48 mg 100 g-1 in 2014), the lowest concentration was found in 'AusiD4' (31.71 mg 100 g-1 in 2013 and 33.19 mg 100 g-1 in 2014). The current common commercial cultivar 'Nonpareil' ranked in the middle (47.16 mg 100 g-1 in 2013 and 52.67 mg 100 g-1 in 2014), which was significantly lower than four new selections ('AusiD5', 'AusiD1', 'AusiD3' and 'AusiD7').
Zhu, Y., Lim, Y.Ch. and Wirthensohn, M. (2016). New almond selections with high tocopherol concentration. Acta Hortic. 1109, 165-168
almond oil, vitamin E, Prunus dulcis