02100naa a2200253 a 450000100080000000500110000800800410001902400410006010000190010124501170012026000090023752013240024665000210157065000130159165300240160465300200162865300210164870000180166970000200168770000310170770000220173870000130176077300730177314914072018-05-24       2008    bl uuuu     u00u1 u    #d7 a10.2225/vol11-issue1-fulltext-22DOI1 aPEREIRA, L. K.  aHeterozygosity following half-sib recurrent selection in popcorn using isoenzyme markers.h[electronic resource]  c2008  alsozyme biochemical marker may be useful tool for genomic analysis of maize populations undergoing recurrent selection. Thus, isozymes markers was utillzed for assess tbe changes in tbe genetic variability and distance in a BraziUan composite population of popcorn following four cyeles of recurrent selection for yield. Qne hundred and ninety-six half-sib families were evaluated from each cyele and tbe ten highest-yielding families (5.2%) were recombined to produce the next cyele. lsozyme analysis considered 80 seedlings per cyele. Simple linear regression equations were estimated among tbe allele frequencies in each locus in function of tbe selection cyeles, the genetic distances among the cyeles and tbe average heterozygosity per locus for each cyele. Regression analysis did not reveal any common trend for changes in aUele frequencies presumably due to selection. The estimates of tbe number of polymorphic locus, of tbe mean of aUele per locus and tbe mean heterozygosity did not reveal any reduction in variability. lt was concluded tbat four selection cyeles did not cause relevant changes in tbe variability or genetic distance among the selection cyeles of CMS-43 popcorn population. lsozymes markers analysis showed that tbe number of recombined half-sib families in recurrent selection was suitable.  agenetic distance  aZea mays  aAllozymes frequency  aMilho de pipoca  aSelection cycles1 aSCAPIM, C. A.1 aMANGOLIN, C. A.1 aMACHADO, M. de F. P. da S.1 aPACHECO, C. A. P.1 aMORA, F.  tElectronic Journal of Biotechnologygv. 11, n. 1, p. 107-115 , 2008.