SciELO - Scientific Electronic Library Online

 
vol.20 número3First description of microchromosome in the Anostomidae fish Schizodon nasutus from ArgentinaGenetic variability in salt tolerance during germination of Stylosanthes humilis H.B.K. and association between salt tolerance and isozymes índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Brazilian Journal of Genetics

versión impresa ISSN 0100-8455

Resumen

SANTOS, Patrícia Guimarães; SOARES, Antônio Alves  y  RAMALHO, Magno A.P.. Estimates of genetic and phenotypic parameters in a segregant population of rice irrigated by continuous flooding. Braz. J. Genet. [online]. 1997, vol.20, n.3 ISSN 0100-8455.  http://dx.doi.org/10.1590/S0100-84551997000300013.

Estimates of genetic and phenotypic parameters were obtained by using data from families of a recurrent selection program in rice. An experiment using population CNA-IRAT 4ME/1/1 was conducted at two locations (Lambari and Cambuquira) in the State of Minas Gerais, Brazil. At Lambari, families S0:2 and S0:3 were assessed during crop seasons 1992/1993 and 1993/1994, respectively. In the Cambuquira trial, only S0:3 families were tested in 1993/1994. The experimental design was a 10 x 10 lattice with three replications. The following traits were assessed: grain yield (GY), mean number of days to flowering (FL), plant height (PH), and the incidence of neck blast (NB) caused by Pyricularia grisea and grain staining (GS) caused by Drechslera oryzae. This population proved to be promising for recurrent selection, as it had high average yield and genetic variability. Heritability estimates obtained using variance components were generally greater than estimates of realized heritability, and heritability obtained by parent-offspring regression

        · resumen en Portugués     · texto en Inglés