IBAM   22618
INSTITUTO DE BIOLOGIA AGRICOLA DE MENDOZA
Unidad Ejecutora - UE
artículos
Título:
Genetic analysis of a garlic (Allium sativum L.) germplasm collection from Argentina.
Autor/es:
GARCÍA LAMPASONA, SC; ASPRELLI, PD; BURBA, JL
Revista:
SCIENTIA HORTICULTURAE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 p. 183 - 189
ISSN:
0304-4238
Resumen:
Although garlic spreads asexually, it shows a wide diversity for physiologic, morphologic and agronomic
characters, due to the accumulation of mutations. Our objective was to examine the genetic diversity
of a collection of 43 national and foreign introductions using fluorescent Amplified Fragment Length
Polymorphism (fAFLP) markers for characterizing previously phenotypical. 351 bands were obtained, of
those 251 were polymorphic. The obtained genotypes were analyzed by means of the program Structure
v2.2 according to a mixture model of frequencies correlated by allelic population. Twenty simulations of
55,000 steps defaulting from two to eight different genetic populations were carried out. The solutions
with more likelihood were obtained by conforming five groups of clones. Most of the individuals showed
compound genotypes for portions of two or more populations and duplications were identified. If the
phenotypical classifications are correct, the phenotype can respond to different genetic origins, including
individuals genetically atypical in a uniformly phenotypical population. Some clones were isolated
after multiple selections on populations of garlic, what is not surprising, is that some are more genetically
related than others. The genetic relationships found in the collection of garlic belong together with
the classification of the ecophysiological groups, although not in a definitive way, additional analysis
being necessary. The conservation of the genetic diversity is of vital importance because it guarantees a
broader background with which to practice artificial selection assuring the success of future programs of
improvement.