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This book describes the development of genetic resources in
amaranths, with a major focus on genomics, reverse, and forward
genetics tools and strategies that have been developed for crop
improvement. Amaranth is an ancient crop native to the New World.
Interest in amaranths is being renewed, due to their adaptability,
stress tolerance, and nutritional value. There are about 65 species
in the genus, including Amaranthus caudatus L., A. cruentus L., and
A. hypochondriacus L., which are primarily grown as protein-rich
grains or pseudocereals. The genus also includes major noxious
weeds (e.g., A. palmeri). The amaranths are within the
Caryophyllales order and thus many species (e.g., A. tricolor)
produce red (betacyanin) or yellow (betaxanthin) betalain pigments,
which are chemically distinct from the anthocyanins responsible for
red pigmentation in other plants. A. hypochondriacus, which shows
disomic inheritance (2n = 32; n= 466 Mb), has been sequenced and
annotated with 23,059 protein-coding genes. Additional members of
the genus are now also been sequenced including weedy amaranths,
other grain amaranths, and their putative progenitors.
This book describes the development of genetic resources in
amaranths, with a major focus on genomics, reverse, and forward
genetics tools and strategies that have been developed for crop
improvement. Amaranth is an ancient crop native to the New World.
Interest in amaranths is being renewed, due to their adaptability,
stress tolerance, and nutritional value. There are about 65 species
in the genus, including Amaranthus caudatus L., A. cruentus L., and
A. hypochondriacus L., which are primarily grown as protein-rich
grains or pseudocereals. The genus also includes major noxious
weeds (e.g., A. palmeri). The amaranths are within the
Caryophyllales order and thus many species (e.g., A. tricolor)
produce red (betacyanin) or yellow (betaxanthin) betalain pigments,
which are chemically distinct from the anthocyanins responsible for
red pigmentation in other plants. A. hypochondriacus, which shows
disomic inheritance (2n = 32; n= 466 Mb), has been sequenced and
annotated with 23,059 protein-coding genes. Additional members of
the genus are now also been sequenced including weedy amaranths,
other grain amaranths, and their putative progenitors.
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