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Combining Ability of A, B, R & Hybrids for T. Aman, 2009

Anowara Akter
Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Dr. Md. Jamil hasan
Principal Scientific Officer
Head Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Abstract/ Executive Summary:

Combining ability on grain yield and its components from line x tester analysis of thirty rice hybrids produced by crossing five CMS lines and six testers of local and exotic origin were studied. The analysis revealed higher sca variance than gca variance for all the traits indicating the prevalence of non-additive gene action. The combining ability studies of the parents provide information which helps in the selection of better parents for effective breeding. Combining ability analysis also provides information on additive and dominance variance. Among the 30 crosses, the combination GuiA/BRRI12R produced the highest grain yield per plant (18.02 g) followed by GuiA/NewR4 (17.92 g) and GuiA/BRRI13R (17.52 g) which were showed average over parents and checks. These crosses could be used for next year yield trial.

Keywords: Combining ability, Heterosis, GCA, SCA

Location: BRRI HQ, Gazipur

Start Date: 07-03-2009

End Date: 31-10-2009

Program Area: Variety and Species

Commodity: Rice

Objectives:

To select best combiner (s) in respect of grain yield and yield components

Methodology:

Five (BRRI12R, BRRI13R, BRRI14R, New R₄_, New R₆) restorer lines were crossed with six testers (BRRI9A, BRRI10A, II32A, D.ShanA, WanA, GuiA) to generate 30 rice hybrids during T. Aman 2009. All the parents and their 30 hybrids and three checks were raised in the randomized complete block design with three replications during T. Aman season 2009. Twenty one days old seedlings were transplanted in 2m² plot sized using single seedling per hill at a spacing of 20 cm x 15 cm. Fertilizers were applied @ of 150:100:70:60:10 kg/ha Urea, TSP, MP, gypsum and ZnSO₄ respectively.

Source of Information: BRRI Annual Report 2009-2010, page no.10,11 & 12, BRRI,Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 50000/-

Total Budget (Tk.) : 50000/-

Achievement/Findings:

Among the 30 crosses, the combination GuiA/BRRI12R produced the highest grain yield per plant (18.02 g) followed by GuiA/NewR4 (17.92 g) and GuiA/BRRI13R (17.52 g) which were showed average over parents and checks. These crosses could be used for next year yield trial.

Knowledge Management: Report/Proceedings