01850naa a2200277 a 450000100080000000500110000800800410001910000190006024501450007926000090022452010690023365000120130265000080131465300160132265300140133865300150135265300190136765300110138665300180139770000200141570000180143570000220145370000180147570000250149377300540151814904652018-06-06       2006    bl uuuu     u00u1 u    #d1 aPEREIRA, L. K.  aMalate dehydrogenase isozyme patterns in four cycles of half-sib selection from CMS-43 popcorn variety (Zea mays L.).h[electronic resource]  c2006  aMalate dehydrogenase isozyme patterns in CMS-43 popcorn obtained from half-sib selection in four-year cycle (C0-CIV cycles) showed two active sMdh genes in coleoptiles tissues of all CMS-43 samples analysed and that particular physiological conditions seems produce a differential association of subunits coded by sMdh-1 and sMdh-2 loci. The sMDH-1/sMDH-2 heterodimer is always present in all coleoptiles samples while homodimers fluctuate in sMDH-1/sMDH-1 and sMDH-2/sMDH-2 subunit associations. Three mMdh loci containing significant frequencies of null alleles were identified at mMdh-1 and mMdh-2 loci. Null alleles, which result neither in active homodimers nor in heterodimers for mMdh-1 (mMdh-1n/n) and mMdh-2 (mMdb-2n/n) loci, and null alleles which result in inactive homodimers and active heterodimers for mMdh-1 (mMdh-1n/+) and mMdh-2 (mMdh-2n/+) loci, have been detected in CMS-43 coleoptiles. Frequencies of null alleles at mMdh-1 (40.6%) and mMdh-2 (6.2%) loci after four cycles of half-sib selection from CMS-43 popcorn cannot be considered as low..  aPoaceae  aZea  aangiosperms  aCyperales  aeukaryotes  amonocotyledons  aplants  aSpermatophyta1 aMANGOLIN, C. A.1 aSCAPIM, C. A.1 aPACHECO, C. A. P.1 aBONATO, C. M.1 aMACHADO, M. F. P. S.  tMaydica, Bergamogv. 51, n.3-4, p. 561-566, 2006.