caa a22 4500 477046592 CHVBK 20180405111332.0 cr unu---uuuuu 170330e19960401xx s 000 0 eng 10.1007/BF02861452 doi (NATIONALLICENCE)springer-10.1007/BF02861452 Physiological studies and determination of chromosome number in Maca, Lepidium Meyenii (Brassicaceae) [Elektronische Daten] [Carlos Quiros, Andrea Epperson, Jinguo Hu, Miguel Holle] Estudios Fisiologicos y Determinacion de Numero Cromosomico de la Maca, Lepidium meyenii (Brassicaceae) Experiments based on four accessions of maca (Lepdium meyenii) disclosed higher developmental rates in plants grown in neutral pH (6.6) soil when compared with those grown in acidic soil (5.3). Photoperiod response studies revealed similar growth rate for plants grown under either long day or short day condition. Plants in the field and growth chambers completed their life cycle in 11 months or less, therefore maca can be considered an annual crop. These results suggest that the range of adaptation of maca is not as narrow as previously believed, and therefore it can be successfully produced outside its natural habitat. Chromosome counts and predominance of bivalents in diakinesis and metaphase I disclosed that maca is a disomic octoploid of 2n=8x=64 chromosomes. Field and growth chamber observations and morphological uniformity of the plants within accessions indicate that maca relies mainly on self-fertilization for its reproduction. The New York Botanical Garden, 1996 Peruvian ginseng nationallicence cruciferae nationallicence Brassicaceae nationallicence photoperiod nationallicence chromosomes nationallicence Quiros Carlos Department of Vegetable Crops, University of California, 95616, Davis, CA aut Epperson Andrea Department of Vegetable Crops, University of California, 95616, Davis, CA aut Hu Jinguo Department of Vegetable Crops, University of California, 95616, Davis, CA aut Holle Miguel Genetic Resources, International Potato Center, Lima, Peru aut Economic Botany Springer-Verlag 50/2(1996-04-01), 216-223 0013-0001 50:2<216 1996 50 12231 https://doi.org/10.1007/BF02861452 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02861452 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Quiros Carlos Department of Vegetable Crops, University of California, 95616, Davis, CA aut NATIONALLICENCE 700 1- Epperson Andrea Department of Vegetable Crops, University of California, 95616, Davis, CA aut NATIONALLICENCE 700 1- Hu Jinguo Department of Vegetable Crops, University of California, 95616, Davis, CA aut NATIONALLICENCE 700 1- Holle Miguel Genetic Resources, International Potato Center, Lima, Peru aut NATIONALLICENCE 773 0- Economic Botany Springer-Verlag 50/2(1996-04-01), 216-223 0013-0001 50:2<216 1996 50 12231 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer