caa a22 4500 475795709 CHVBK 20180406123723.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1007/PL00002905 doi (NATIONALLICENCE)springer-10.1007/PL00002905 Predicting hybrid value in bread wheat: biometric modelling based on a ”top-cross” design [Elektronische Daten] [F. -X. Oury, P. Brabant, P. Bérard, P. Pluchard] Abstract : Multi-environmental experimentation made it possible to compare 311 hybrids and their 59 parental lines for five characters: yield, two yield components (number of grains per m2 and 1000-grain weight), height and date of heading. At all three sites, average high-parent heterosis exceeded 6%, and our results confirm that hybrids in general head as early as the earlier parent does and are as high as the taller parent. For the five characters studied ecovalences were significantly lower in the F1 than in the parents, indicating a higher level of homeostasis for hybrids. The experimental model, based on a ”top-cross” design comprised of 55 lines used as females and four testers, made it possible to implement different hybrid-value prediction models. For yield, by far the most important character to predict, the predictor based on the general combining ability and the per se value of the parents, appears to be the most interesting. The prediction remains, however, imperfect as specific combining ability (SCA) has a strong impact for this character. Attempting to take account of SCA in the prediction, by using a multiplicative model for ”male×female” interaction modelling, did not prove convincing. Springer-Verlag Berlin Heidelberg, 2000 Key words Hybrid wheat nationallicence Heterosis nationallicence Combining ability nationallicence Multiplicative model nationallicence Oury F. -X INRA, Station d'amélioration des plantes, domaine de Crouelle, F-63000 Clermont-Ferrand, France e-mail: oury@clermont.inra.fr, Tel.: 04-73-624326, Fax: 04-73-624453, FR aut Brabant P. Station de génétique végétale, Ferme du Moulon, F-91190 Gif-sur-Yvette, France, FR aut Bérard P. INRA, Station d'amélioration des plantes, domaine de Crouelle, F-63000 Clermont-Ferrand, France e-mail: oury@clermont.inra.fr, Tel.: 04-73-624326, Fax: 04-73-624453, FR aut Pluchard P. INRA, Station d'amélioration des plantes, domaine de Brunehaut, F-80200 Estrées-Mons, France, FR aut https://doi.org/10.1007/PL00002905 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00002905 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oury F. -X INRA, Station d'amélioration des plantes, domaine de Crouelle, F-63000 Clermont-Ferrand, France e-mail: oury@clermont.inra.fr, Tel.: 04-73-624326, Fax: 04-73-624453, FR aut NATIONALLICENCE 700 1- Brabant P. Station de génétique végétale, Ferme du Moulon, F-91190 Gif-sur-Yvette, France, FR aut NATIONALLICENCE 700 1- Bérard P. INRA, Station d'amélioration des plantes, domaine de Crouelle, F-63000 Clermont-Ferrand, France e-mail: oury@clermont.inra.fr, Tel.: 04-73-624326, Fax: 04-73-624453, FR aut NATIONALLICENCE 700 1- Pluchard P. INRA, Station d'amélioration des plantes, domaine de Brunehaut, F-80200 Estrées-Mons, France, FR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer