منابع مشابه
Species Concepts and Relationships in Wild and Cultivated Potatoes
Wild and cultivated potatoes (Solanum section Petota) present challenges to taxonomists arising from lack of clearly defined morphological character differences among many species, phenotypic plasticity, a range of ploidy levels from diploid to hexaploid, and hybrid speciation and introgression. Taxonomic treatments of the group have differed greatly regarding numbers of species and hypotheses ...
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An average of 14(7-34) plants each for 61 different collections of Zea (maize and its wild relatives, the teosintes) were studied for 12 enzyme systems coded for by 21 loci. Principal component and cluster analyses based on allele frequencies showed Zea can be divided into two major groups: 1) sect. Luxuriantes, including Z. perennis, Z. diploperennis, and Z. luxurians; and 2) sect. Zea (in par...
متن کاملDNA barcoding will frequently fail in complicated groups: An example in wild potatoes.
DNA barcoding ("barcoding") has been proposed as a rapid and practical molecular method to identify species via diagnostic variation in short orthologous DNA sequences from one or a few universal genomic regions. It seeks to address in a rapid and simple way the "taxonomic impediment" of a greater need for taxonomic identifications than can be supplied by taxonomists. Using a complicated plant ...
متن کاملGeographical and environmental range expansion through polyploidy in wild potatoes ( Solanum section Petota )
Aim To assess evidence for geographical and environmental range expansion through polyploidy in wild potatoes ( Solanum sect. Petota ). There are diploids, triploids, tetraploids, pentaploids and hexaploids in this group. Location Wild potatoes occur from the south-western USA (Utah and Colorado), throughout the tropical highlands of Mexico, Central America and the Andes, to Argentina, Chile an...
متن کاملExploring Folate Diversity in Wild and Primitive Potatoes for Modern Crop Improvement
Malnutrition is one of the world's largest health concerns. Folate (also known as vitamin B₉) is essential in the human diet, and without adequate folate intake, several serious health concerns, such as congenital birth defects and an increased risk of stroke and heart disease, can occur. Most people's folate intake remains sub-optimal, even in countries that have a folic acid food fortificatio...
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ژورنال
عنوان ژورنال: Pesquisa Agropecuária Brasileira
سال: 2001
ISSN: 0100-204X
DOI: 10.1590/s0100-204x2001000500008