SciELO - Scientific Electronic Library Online

 
vol.26 issue1Planting date and cultivar influence on the total yield of garlic (Allium sativum L.) in Santa Maria, RSDetection of the mode of reproduction in molasses grass (Melinis minutiflora Beauv.) by enzyme patterns author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Ciência Rural

Print version ISSN 0103-8478

Abstract

AMARAL, Adriane Leite do et al. Heritability estimatives for the oat adaptative traits heading date and plant height. Cienc. Rural [online]. 1996, vol.26, n.1, pp. 33-37. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84781996000100007.

Field experiments were conducted in 1993 and 1994 in Eldorado do Sul, RS aiming to increment the efficiency of artificial selection in oat for the adaptative traits heading date and plantheight. The heritability (h2) was estimated for 19 segregating populations conducted by the pedigree method and using linear regression as proposed by LUSH (1940). Measurements were taken weekly for heading date from 10 plants in each F3 segregant population during five subsequent weeks in 1993. Plant height was mesured 15 days after anthesis. In 1994, the F4 populations were measured for plant height and heading date. Different h2 values were obtained for each trait from the different segregating populations. The heritability values were from 0.19 to 0.59 for heading date and from 0.43 to 0.92 for plant height. The high h2 estimates as obtained for these two adaptative traits indicate that artificial selection can be succefully done in early generations.

Keywords : oat; heritability; genetic gain.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese