If the performance of AF1 differs from that of BF1, it may be attributed to the sterile cytoplasm derived from the CMS line as the latter does not involve this.
Rani (2008) also reported that sterile cytoplasm exerted negative impact on head rice recovery in general and all the AF1 hybrids resulted from IR-58025A were found to be inferior to corresponding BF1 hybrids for the trait.
2006) reported that WA cytoplasm in the CMS lines Pusa 3A and IR-58025A did not negatively influence the appearance of cooked kernel as indicated by the non- significant differences between the AF1 (A x R) and BF1 (A x R) hybrids for kernel length/breadth ratio after cooking.
The apparently conflicting effect of overcoming surface stratification at BF1 (Taabinga) and BV3 (Wooroolin), where no benefits of mixing were recorded, and RF3 (Haly Creek-greater K uptake as mixing increased) can be explained when considering the mixing methods employed at the different sites.
1 Endo hypersodic self mulching Grey Vertosol KCl rate x incorporation method Taabinga site BF1 0-0.