01503naa a2200229 a 450000100080000000500110000800800410001910000220006024501080008226000090019052008040019965000160100365000110101965000180103065000140104865300270106265300240108965300250111370000230113870000220116177300900118310489852010-12-01       2006    bl uuuu     u00u1 u    #d1 aLAMBERT, E. de S.  aPotato improvement for tropical conditionsbII. Selection indices and efficiency of indirect selection.  c2006  aThis study evaluated the efficiency of selection indices that can contribute to potato clone selection under favorable and stressful conditions as well as the possibility of indirect selection for heat tolerance. Among the selection indices, the arithmetic and geometric means and index 4 were the most appropriate. The susceptibility index and percentage of yield reduction indicate only specifically adapted clones. Indirect selection for heat tolerance is not suitable in view of the law correlation coefficient among clone means in the environments. Selection based on the overall environment mean is more fit to select broadly adapted genotypes, in spite of low perfomance means under favorable conditions. Well-adapted genotypes to both stress and favorable conditions can however be selected.  aAgricultura  aBatata  aBiotecnologia  aGenética  aMelhoramento genético  aSolanum tuberosum L  aTolerância ao calor1 aPINTO, C. A. B. P.1 aMENEZES, C. B. de  tCrop Breeding and Applied Biotechnology, Londrinagv. 6, n. 3, p. 185-193, June 2006.