IngentaConnect Comparison of doubled haploid lines and their mid-generation prog...

Abstract:

A doubled haploid method (DH) has been used to rapidly advance generations in triticale, and selections then made for high yielding homozygous lines. This study aimed at comparing the forage performance of DH populations produced from the BC₁F₁, TC₁F₁ and F₂ generations with superior mid-generation progenies (BC_{1}F_{3}, TC₁F₃ and F₄) derived from field selection. One hundred and sixty eight DH lines derived from anther culture of eight populations were used. The results of analysis of variance for plant weight (PW), and dry matter yield (DM) of triticale lines developed by the method of doubled haploidy and field selections showed that the differences between the two methods were not significant. Differences among the three type crosses (BC₁F₃, TC₁F₃, F₄/ BCF, TCF and F), method × cross interaction, and among populations within methods × cross were significant for PW and DM. Unlike forage characters, no significant differences were obtained for grain yield (GY) in all sources of variations. However, DH lines generally had wider ranges for PW, DM, GY and total biomass (TB) than lines derived from field selections. The observations of higher forage and grain performances of several DH lines compared to their corresponding field-derived populations show that the forage and dual-purpose breeding of triticale DH lines by means of hydroponics and anther culture of individual-plant selections in early generation under greenhouse conditions is highly beneficial.

Keywords: doubled-haploid (DH); early generation; forage; hydroponics; selection; triticale

Language: English

Document Type: Research article

Affiliations: 1: Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan-84156, Iran 2: University of Sydney, Plant Breeding Institute, Cobbitty, Private Bag 11, Camden NSW 2570, Australia

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Comparison of doubled haploid lines and their mid-generation progenitors in forage and dual-purpose triticales under greenhouse hydroponic conditions