%0 Journal Article
%T Responses of Maize Landrace Seedlings to Inoculations of Fusarium spp.
%A Dolores Briones-Reyes
%A Fernando Castillo-Gonz¨¢lez
%A Carlos de Le¨®n-Garc¨ªa-de-Alba
%A Antonio Ram¨ªrez-Hern¨¢ndez
%A V¨ªctor Heber Aguilar-Rinc¨®n
%A Jos¨¦ Luis Ch¨¢vez-Servia
%J Open Access Library Journal
%V 4
%N 6
%P 1-14
%@ 2333-9721
%D 2017
%I Open Access Library
%R 10.4236/oalib.1103687
%X
To assess the reaction of
maize landrace seedlings to inoculations of Fusarium spp. derived from different geographic origins, inoculations were performed to
substrates in which seeds were germinated, and the severity of damage and the
degree of resistance and/or tolerance at the seedling stage were later
evaluated. In this study, 57 populations of maize were collected in the states
of Oaxaca, Puebla, Tlaxcala, Guerrero and Estado de Mexico, Mexico, and at same
time five sources of Fusarium spp.
inoculum were obtained. The maize collection and inocula were then evaluated in
a bi-factorial arrangement of treatments in a randomized complete block design
with four replications. Significant differences were observed in the virulence
of the isolates from each geographic region (p < 0.01). The inoculum consisting of isolates from Estado de
Mexico proved to be the most virulent, whereas the inoculum from the state of
Guerrero caused the least amount of damage to maize seedlings. The length of
the roots and aerial portions of the seedlings were reduced due to the effect
of the pathogen in comparison with seedlings that emerged in the substrate
without inocula. The maize populations responded differently to the pathogen
depending on its geographic origin, as the maize plants expressed different
amounts of damage caused by the various inocula to which they were subjected.
No direct relationship was observed between the virulence of the inoculum and
the resistance/tolerance to the disease of populations from the same origin; in
some cases, such as that of Tlaxcala, pathogens of the same origin caused more
damage to maize from that region.
%K Zea mays L.
%K Fusarium spp.
%K Virulence
%K Resistance
%K Pathosystem
%U http://www.oalib.com/paper/5286755