. Betalains, conferring yellow-to-red colours, are nitrogen-containing water-soluble compounds derived from tyrosine that are found only in a limited number of plant lineages and are divided into two major structural groups: red-violet betacyanins and yellow betaxanthins (Cai et al., 2005; Tanaka et al., 2008). The length of the stem varies from
0.5 to 2.5 m, depending on the variety and the environment (Risi and Galwey, 1984). Bhargava et al. (2007a) observed about 13-fold difference in the stem length (plant height) of several quinoa accessions cultivated in northern India (Table 6.1) and a considerable amount of variation in stem diameter in different quinoa germplasm lines (unpublished data). The stem of quinoa is profusely branched; branching depending mainly on the variety and plant density. The number of primary branches per plant showed a 4.5-fold variation among quinoa lines tested in northern India (Table 6.1).ั
. Betalains, conferring yellow-to-red colours, are nitrogen-containing water-soluble compounds derived from tyrosine that are found only in a limited number of plant lineages and are divided into two major structural groups: red-violet betacyanins and yellow betaxanthins (Cai et al., 2005; Tanaka et al., 2008). The length of the stem varies from0.5 to 2.5 m, depending on the variety and the environment (Risi and Galwey, 1984). Bhargava et al. (2007a) observed about 13-fold difference in the stem length (plant height) of several quinoa accessions cultivated in northern India (Table 6.1) and a considerable amount of variation in stem diameter in different quinoa germplasm lines (unpublished data). The stem of quinoa is profusely branched; branching depending mainly on the variety and plant density. The number of primary branches per plant showed a 4.5-fold variation among quinoa lines tested in northern India (Table 6.1).ั
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