The research carried out in 2014 on the genetic analysis of the ear mutants of barley has been very intensive. From one hand new mutants have been morphologically described, and from the hand molecular characterization and regulation of gene expression have been analyzed. In this report four new ear mutants individuated in the nurseries of the field trials of The “Italian” Barley Genetics Mutant Collection in Fiorenzuola will be shortly described. In a population of double haploid of the Oregon Wolfe Barley, developed by Pat Hayes, grown at Fiorenzuola, several ear mutants and double mutants have been identified. One has been considered as very interesting because at heading all plants in the small plots showed a complete head” (Fig. 1). Crosses will be performed to study the genetics of this “white mutant. Fig.1- head” in OWB (photo Alberici, Pagani) “White In a progeny few plants showed spikes partially modified, characterized by “Leafy-Lemma” several spikelets (Fig.2 ). The remaining spikelets were Is “lemma-less” “Leafy-Lemma”. a new mutation? A progeny test of single seed will be grown in pots in the “Lemma-less” glasshouse to confirm the mutation. Fig. 2 - Spikelets ( Photo Alberici, Pagani) “Lemma-less” By evaluating an F2 population derived from a cross glumes on the lateral 1 (mgl1) x “many elongated outer glumes 1 (eog1)” few plants showed a small spike with reduced number of internodes and spikelets (fig 3, 4, 5). We have proposed to name this mutant “reduced number of internode rachis” or number of spikelets”. This mutant will be “reduced morphologically characterized in detail and used for crosses to perform genetic analysis.
The research carried out in 2014 on the genetic analysis of the ear mutants of barley has been very intensive. From one hand new mutants have been morphologically described, and from the hand molecular characterization and regulation of gene expression have been analyzed. In this report four new ear mutants individuated in the nurseries of the field trials of The “Italian” Barley Genetics Mutant Collection in Fiorenzuola will be shortly described. In a population of double haploid of the Oregon Wolfe Barley, developed by Pat Hayes, grown at Fiorenzuola, several ear mutants and double mutants have been identified. One has been considered as very interesting because at heading all plants in the small plots showed a complete “white head” (Fig. 1). Crosses will be performed to study the genetics of this mutant. Fig.1- “White head” in OWB (photo Alberici, Pagani) In a progeny “Leafy-Lemma” few plants showed spikes partially modified, characterized by several spikelets “lemma-less” (Fig.2 ). The remaining spikelets were “Leafy-Lemma”. Is “Lemma-less” a new mutation? A progeny test of single seed will be grown in pots in the glasshouse to confirm the mutation. Fig. 2 - “Lemma-less” Spikelets ( Photo Alberici, Pagani) By evaluating an F2 population derived from a cross “many glumes on the lateral 1 (mgl1) x elongated outer glumes 1 (eog1)” few plants showed a small spike with reduced number of internodes and spikelets (fig 3, 4, 5). We have proposed to name this mutant “reduced number of internode rachis” or “reduced number of spikelets”. This mutant will be morphologically characterized in detail and used for crosses to perform genetic analysis.