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Abstract Detail



Economic Botany Section

Pratt, Donald B. [1], Adhikary, Dinesh [2].

Morphological Analysis of the Cultivated Grain Amaranths and their Wild and Weedy Relatives.

Three species of grain amaranth were anciently cultivated in the New World: A. hypochondriacus L. in central Mexico, A. cruentus L. in southern Mexico and Guatemala, and A. caudatus L. in Andean Ecuador, Peru, and Bolivia.  Amaranthus hybridus L. is a widespread weedy species found natively throughout the Americas and is now a cosmopolitan weed.  Amaranthus quitensis H.B.K. is a South American endemic.  Both species are thought to have played a roll as a progenitor species of the grain amaranth species.  We analyzed 41 specimens of from the five species, including eleven specimens of A. hybridus and thirteen specimens of A. quitensis morphologically for 33 three continuous pistillate and staminate floral characters and three qualitative floral characters.  The results indicate that the species split into two groups as follows: A. cruentus, A. caudatus, A. hybridus p.p., and A. quitensis form one group; and A. hypochondriacus and A. hybridus p.p. split into a second group.  The segregation of A. hybridus into two separate grouping is consistent with finding from SSR data and confirms Sauer’s 1950 hypothesis that A. hybridus should be split into two races: a “Northern race” and a “Tropcial race”.


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1 - Stephen F. Austin State University, Box 13003 SFA Station, Nacogdoches, TX, 75962, USA
2 - University of Alberta, Biological Sciences, 5-1066 ccis, Edmonton, AB, Canada

Keywords:
Grain Amaranths
Amaranthus
Morphological Analysis.

Presentation Type: Oral Paper:Papers for Sections
Session: 5
Location: River Fork/Grove
Date: Monday, July 28th, 2014
Time: 10:15 AM
Number: 5007
Abstract ID:298
Candidate for Awards:None


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