caa a22 4500 477133886 CHVBK 20180405111712.0 cr unu---uuuuu 170330e19970101xx s 000 0 eng 10.1023/A:1002978405500 doi (NATIONALLICENCE)springer-10.1023/A:1002978405500 Increasing 2n gamete production in diploid alfalfa by cycles of phenotypic recurrent selection [Elektronische Daten] [O. Calderini, A. Mariani] Two cycles of selection (3rd and 4th) were carried out in a diploid population of alfalfa to improve the frequency of 2n gametes. All the plants produced unreduced gametes, except one in the 2n egg population. The average seed set, used as a measure of 2n gametes production, increased significantly in the 2n pollen selection. Conversely, the increase was not significant in the case of 2n eggs. The improvement in 2n pollen production was confirmed cytologically. These results, like those of the first two cycles of selection, suggest that 2n pollen production is controlled by few major genes while 2n egg production is controlled by one recessive major gene and influenced by minor genes. The mutants selected have been utilized for producing heterotic tetraploid progenies through Bilateral Sexual Polyploidization (BSP). Kluwer Academic Publishers, 1997 alfalfa nationallicence bilateral sexual polyploidization nationallicence Medicago sativa nationallicence phenotypic recurrent selection nationallicence 2n gametes nationallicence Calderini O. Istituto di Ricerche sul Miglioramento Genetico delle Piante Foraggere, C.N.R., via della Madonna Alta 130, 06128, Perugia, Italy aut Mariani A. Istituto di Ricerche sul Miglioramento Genetico delle Piante Foraggere, C.N.R., via della Madonna Alta 130, 06128, Perugia, Italy aut Euphytica Kluwer Academic Publishers 93/1(1997-01-01), 113-118 0014-2336 93:1<113 1997 93 10681 https://doi.org/10.1023/A:1002978405500 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002978405500 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Calderini O. Istituto di Ricerche sul Miglioramento Genetico delle Piante Foraggere, C.N.R., via della Madonna Alta 130, 06128, Perugia, Italy aut NATIONALLICENCE 700 1- Mariani A. Istituto di Ricerche sul Miglioramento Genetico delle Piante Foraggere, C.N.R., via della Madonna Alta 130, 06128, Perugia, Italy aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 93/1(1997-01-01), 113-118 0014-2336 93:1<113 1997 93 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer