SciELO - Scientific Electronic Library Online

 
vol.62 issue4Trap attributes influencing capture of Diabrotica speciosa (Coleoptera: Chrysomelidae) on common bean fieldsGenetic diversity of cultivated Coffea arabica inbred lines assessed by RAPD, AFLP and SSR marker systems author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Scientia Agricola

On-line version ISSN 1678-992X

Abstract

BENIN, Giovani et al. Early generation selection strategy for yield and yield components in white oat. Sci. agric. (Piracicaba, Braz.) [online]. 2005, vol.62, n.4, pp.357-365. ISSN 1678-992X.  https://doi.org/10.1590/S0103-90162005000400009.

Several studies have searched for higher efficiency on plant selection in generations bearing high frequency of heterozygotes. This work aims to compare the response of direct selection for grain yield, indirect selection through average grain weight and combined selection for higher yield potential and average grain weight of oat plants (Avena sativa L.), using the honeycomb breeding method. These strategies were applied in the growing seasons of 2001 and 2002 in F3 and F4 populations, respectively, in the crosses UPF 18 CTC 5, OR 2 ´ UPF 7 and OR 2 ´ UPF 18. The ten best genetic combinations obtained for each cross and selection strategy were evaluated in greenhouse yield trials. Selection of plants with higher yield and average grain weight might be performed on early generations with high levels of heterozygosis. The direct selection for grain yield and indirect selection for average grain weight enabled to increase the average of characters under selection. However, genotypes obtained through direct selection presented lower average grain weight and those obtained through the indirect selection presented lower yield potential. Selection strategies must be run simultaneously to combine in only one genotype high yield potential and large grain weight, enabling maximum genetic gain for both characters.

Keywords : selection method; heritability; single plant selection.

        · abstract in Portuguese     · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License