Effect of pollinator on haploid production in durum wheat crossed with maize and pearl millet

The aim of this work was to analyse the influence of the male parent on the production of embryos and haploid plants in durum wheat crossed with maize and pearl millet, to find a proper trait to identify the most efficient pollinators and to evaluate the mixtures of pollen. Two genotypes of durum wheat, low and high responding, were crossed with eight pollen samples: (i) three maize hybrids, (ii) three pearl millet inbred lines, (iii) a mixture of maize pollen and (iv) another mixture of pearl millet pollen. No significant differences on embryos and haploid plant production were observed among the four samples of maize pollen, but there were clear genotypic differences for the production of haploids between genotypes of pearl millet. The best pearl millet genotype produced significantly more haploid plants than the other two and the mixture of pollen. There was no correlation between the production of embryos and haploid plants. Therefore, the production of haploid plants must be the criterion to identify superior pollinators. In addition, a mixture of pollen is inappropriate except when using genotypes previously identified as good pollinators.