02213nam a2200433 a 450000100080000000500110000800800410001910000190006024500310007926000560011030000150016649000530018152011340023465000190136865000120138765000090139965000140140865000230142265000100144565000100145565000310146565000140149665000100151065300310152065300200155165300150157165300180158665300140160465300160161865300120163465300100164665300220165665300100167870000200168870000170170870000220172570000170174770000150176414042812003-09-24       1963    bl uuuu      00u1 u    #d1 aTIMOTHY, D. H.  aRaces of maize in Ecuador.  aWashington, D.C.: National Academy of Sciencec1963  a147p.cil.  a(National Academy of Science. Publication, 975).  a1.  In this report we recognize 29 races of maize, of which six are "poorly defined". This classification is based on 675 collections, which were studied with respect to ear characteristics and geographical distribution. A provisional arrangement made on this basis was revised by study of plant, tassel, and other characteristics.  2.  General descriptions, tabular data on ears, tassels and other characters, internode diagrams, ear cross-sectional diagrams, and ear photographs and distribution maps ar presented for each race.  3.  The great diversity of Ecuadorian maize is related to the complex geography and history of that country. Races have been introduced from  the north and south; hybridization between races has occurred;  and  geographical isolation haspermitted the development of new forms in cental highland Ecuador. 4. Positions of chromosome knobs were determined for 14 of the 29 races described. The Andean knob pattern, first discovered in the races of highland Bolivia, is extended at least to northern Ecuador. Knob patterns are more variable in lowland races, and total knob number is generally higher.  aclassification  aclimate  acorn  ageography  aindigenous peoples  araces  aClima  aDistribuição Geográfica  aGeografia  aMilho  aCaracterística agronomica  aCaracteristicas  aCharacters  aClassificacao  aDescricao  aDescription  aEquador  aMaize  aPessoas indigenas  aRacas1 aHATHEWAY, W. H.1 aGRANT, U. J.1 aTORRE GROZA C. M.1 aSARRIA V. D.1 aVARELA. D.