CHARACTERIZATION OF HYBRIDS BETWEEN H. annuus L. AND THE SUBSPECIES Subrhomboideus (Rydberg) Heiser OF PERENNIAL HEXAPLOID H. pauciflorus / CARACTERIZACIÓN DE LOS HÍBRIDOS ENTRE H. annuus L. Y LA SUBESPECIE Subrhomboideus (Rydberg) Heiser DE LA ESPECIE HEXAPLOIDE PERENNE H. pauciflorus / CARACTÉRISATION DE L’HYBRIDE OBTENU PAR LE CROISEMENT DE H. annuus L. ET DE LA SOUS-ESPÈCE subrhomboideus (Rydberg) Heiser DE L’ESPÈCE HEXAPLOÏDE VIVACE H. pauciflorus
2014
Hristova-Cherbadzi, M. | Atanasova, R. | Batchvarova, R. | Christov, M. | Ivanova, I.
The subspecies Subrhomboideus (Rydberg) Heiser of the perennial hexaploid species Helianthus pauciflorus (rigidus) was crossed with the cultivated sunflower H. annuus L. The crossability rate was high. Seeds and hybrid plants were obtained in both directions of crossing. The F₁ plants had an intermediate type of heritability, but they strongly resembled the wild parent in most important biomorphological characters. All plants were with the perennial cycle of growth. During the second and third years, a large number of plantlets emerged from sleeping buds on the root system of F₁ materials. The hybrid nature of the F₁ plants was confirmed through cytological, RAPD and electrophoretic analyses of seed storage proteins. Polymorphism of H. annuus, H. pauciflorus ssp. subrhomboideus and theirs F₁ hybrids was studied by RAPD. The results showed introgression of the subspecies Subrhomboideus in the hybrid progeny. It was established that the subspecies carried Rf genes for cms Pet-1. As a result of self-pollination, sib-pollination and back-crossing to cultivated sunflower, F₂, F₃, F₄ and BC₁ progenies were obtained. Some of the obtained hybrids were included in a program of development of lines for heterosis breeding in sunflower.
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