02231naa a2200265 a 450000100080000000500110000800800410001910000250006024500850008526000090017050001490017952013350032865000170166365000180168065000230169865300180172165300190173965300160175870000200177470000200179470000200181470000190183470000230185377300890187610955012019-06-28       1999    bl uuuu     u00u1 u    #d1 aGONÇALVES, P. de S.  aPhenotypic stability and genetic gains in six-year girth growth of hevea clones.  c1999  aTítulo em português: Estabilidade fenotípica e ganhos genéticos de seis anos de avaliação do perímetro do caule em clones de seringueira.  aRubber tree (Hevea brasiliensis (Willd.ex Adr. de Juss.) Muell. arg.) budgrafts of seven were evaluated on five constrasting sites in the plateau region of the Sao Paulo State, Brazil. The objective of this work was to study the phenotypic stability for girth growth. The experimental design was a randomized block design with three replications and seven treatments. Analysis of variance of girth at six-year plant growth indicated a highly significant colone x site interaction. Only linear sites and clone x site components of clone x year interaction were significant, indicating that the performance of clones over sites for this trait could be predicted. The clones GT 1 and PB 235 showed the greatest stability in relation to girth growth, with foreseen responses to change, introduced in the sites. The clones PB 234 and IAN 873 showed significative difference in relation to regression coefficient, representing clones with specific adaptability on favorable and unfavorable sites respectiverly. The clone GT 1 became the most promissory one in the study of stability and adaptability even showing low girth growth. Expected genetic gains from planting sites, along with estimates of clonal variance and repeatability of clonal means are generally greatest or close to the greates when selection is done at the same site.  aheritability  arepeatability  aHevea Brasiliensis  aHerdabilidade  aRepetibilidade  aRubber tree1 aFUJIHARA, A. K.1 aORTOLANI, A. A.1 aBATAGLIA, O. C.1 aBORTOLETTO, N.1 aSEGNINI JUNIOR, I.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 34, n. 7, p. 1223-32, jul. 1999