                                                                 ! ! ! ! "#$% "#$% "#$% "#$% Álvaro Júlio Pereira 1 , Sandra Aparecida de Oliveira Collet 1 , Pedro Soares Vidigal Filho 2 and Maria de Fátima Pires da Silva Machado 1 * 1 Departamento de Biologia Celular e Genética, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, Maringá, Paraná, Brasil. 2 Departamento de Agronomia, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, Maringá, Paraná, Brasil. *Author for correspondence.     !"" #    #   $% &’()"* + " (( " ""# # ##" # #( &,-’* .(  + " (( (   )" " ( #  ""  # # "   +( ( )     .( #(   )"  ( " # &/0)1 /02# 31 /3 "  $1 /4"(1 /5$1 /5$61 " /5$1* (+"  #" )  !##  ( /02# 31 # +(  ## +(  76 8, #   +  # "   #    # " +( ( ) ,-’ ""  "  8  ( ) ( 76 8,    ) "   ## 8  ( /02# 31 #    #  ,-’  )# )#( &$33*       !! "#$ % &$’!  !%$!( )*&! !%!(   !%+ ,-.$!!/  9 " #( : ; !"" "  # " "   $% &’()"*  "  )#( 2 " 2 " #  # " ##"  ""# # " <" &,-’*  =>   # "; " 9 )"    ?"" #  #( " # "   "  ; " # )2    @ "; #2 " 9 !9" " # " &/0)1 /02# 31 /3 "  $1 /4"(1 /5$1 /5$61 " /5$1*   )"" #9"   ## " &76 8,* !#   # /02# 31  => " 9  #( " # "   " # )2    "  2 " ,-’ ; " " 9 #"    " =;   =; 2 76 8, "  "  " ## " # /02# 31 !&!’!-!’ # " " 9 ,-’ A  " & & & & $ &  $%*  ( (   )("   (   (     " % &3##   777* $   # "     "  # " ( " $ # ( # ) #"      ( "B " #  &#%   77* 4  ( ) (  " "  &C 77D @# " (# 777* .(   "    ) )  #  # " )# " # +(( " " "  #"  ( !    .( # # # "  ( #    )# )#( &    ,* ( ) " &4"   77*