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ISOZYMATIC VARIATION IN GUATEMALAN RACES OF MAIZE.

Abstract：

:Isozymatic data taken from 67 Guatemalan collections of maize were subjected to numerical taxonomic analyses to elucidate systematic relationships among the 19 maize races and subraces described for Guatemala by Wellhausen et al. As with Bolivian and Mexican races, isozymatic variation in Guatemalan maize was strongly associated with altitude. Guatemalan lowland races were in general isozymatically distinct from races of higher elevations. Two middle elevation Guatemalan races proved difficult to place taxonomically. As a group, Guatemalan highland races were isozymatically more diverse than races from lower elevations, and were rather weakly differentiated from Mexican highland races. Notably, variational patterns evident from phenetic analyses of isozyme data were generally congruent with those apparent in phylogenetic analyses. The data reported here, and in earlier studies, suggested that divergent combinations of isozymatic, karyotypic, and morphological features have evolved in local maize races from Mexico, Guatemala, and Bolivia, perhaps as the result of the different selective regimens indigenous cultivators have imposed on different regional phylogenetic lineages.

journal_name

Am J Bot

journal_title

American journal of botany

authors

Bretting PK,Goodman MM,Stuber CW

doi

10.1002/j.1537-2197.1990.tb13547.x

subject

Has Abstract

pub_date

1990-02-01 00:00:00

pages

211-225

issue

2

eissn

0002-9122

issn

1537-2197

journal_volume

77

pub_type

杂志文章

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