GENETIC-ANALYSIS OF ANTHER-CULTURE RESPONSE IN 6X TRITICALE

A quantitative genetic analysis was conducted to determine the inherit ance of androgenetic response in hexaploid triticale. One highly-respo nsive genotype (Do 1 triticale) and three low-responding advanced CIMM YT lines (Rhino, Juanillo 97 and Ira Drira) were used as parents to pr oduce a complete set of reciprocal F-1, F-2 and backcross generations. Estimates for genetic effects were determined using a generation-mean analysis following the method of Mather and Jinks. Both embryo induct ion and plant regeneration potential fitted well with the simple three -parameter additive-dominance (AD) model indicating the absence of any significant epistatic effects. Highly significant additive effects we re detected for embryo induction, suggesting that breeding and selecti on can be effective in improving the induction response of triticale. The high [d]/[h] ratio indicates dominance of the alleles causing high embryo induction. The production of regenerant plants from embryos ap peared to be a more complex trait because of its high sensitivity to e nvironmental factors.