High morphological diversity of Amaranthus cruentus (Amaranthaceae) and its putative wild ancestor revealed by pistillate floral characterization in the proposed domestication center of origin
Por:
Solis-Fernandez, Karen Z., Aguilera-Cauich, Erick A., Cifuentes-Velasquez, Rolando, Flores-Olvera, Hilda, Andueza-Noh, Ruben H., Sanchez-Del Pino, Ivonne
Publicada:
20 abr 2020
Resumen:
Amaranthus (Amaranthaceae) is a widespread genus that includes noxious
weeds, economically important species for food, forage, medicinals and
ornamentals. Three species of Amaranthus have been cultivated for their
grain in the world, i.e. A. hypochondriacus, A. caudatus, and A.
cruentus. It has been postulated that A. cruentus was domesticated from
the probable wild progenitor A. hybridus, and that the domestication
event occurred between southern Mexico and Guatemala, the region where
the Mayan civilization flourished. Morphological variation in this grain
amaranth and its putative wild progenitor has been poorly documented,
even though this area is a possible center of domestication of A.
cruentus. Samples of A. cruentus, A. hybridus, hybrids between these two
species and aberrant morphotypes collected were studied morphologically
using multivariate statistical methods on pistillate floral characters
to (1) assess the diversity of grain amaranth A. cruentus and its
postulated wild progenitor A. hybridus in the proposed domestication
center of origin, (2) test the hypothesis that some hybrids and aberrant
morphotypes found in the region can be morphologically differentiated
from A. hybridus and A. cruentus based on statistical analyses, and (3)
test and review the diagnostic characters traditionally used for
assessing species circumscription. Our results showed high morphological
diversity for these two species in the study region, indicating
differentiation of both species, apparently based primarily on
hybridization. Morphological variants on flower, bract, sepal, seed, and
fruit characters were significant for confirming and circumscribing
species.
Filiaciones:
Solis-Fernandez, Karen Z.:
Ctr Invest Cient Yucatan AC, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico
Aguilera-Cauich, Erick A.:
Ctr Invest Cient Yucatan AC, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico
Cifuentes-Velasquez, Rolando:
Univ Valle Guatemala, Ctr Estudios Agr & Alimentarios, 18 Av 11-95 Zona 15 Vista Hermosa 3, Guatemala City 01015, Guatemala
Flores-Olvera, Hilda:
Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Apdo Postal 70-367, Ciudad De Mexico 04510, Mexico
Andueza-Noh, Ruben H.:
Inst Tecnol Conkal, Ave Tecnol S-N Conkal, Merida 97345, Yucatan, Mexico
Sanchez-Del Pino, Ivonne:
Ctr Invest Cient Yucatan AC, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico
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