Titre du document / Document title

Variation for reproductive and agronomic traits among T. repens x T. nigrescens third generation backcross hybrids in the field: Reproductive and agronomic traits among BC3 hybrids of T. repens x T. nigrescens

Auteur(s) / Author(s)

MARSHALL A. H. ⁽¹⁾ ; MICHAELSON-YEATES T. P. T. ⁽¹⁾ ; ABBERTON M. T. ⁽¹⁾ ; WILLIAMS A. ⁽¹⁾ ; POWEL H. G. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion SY23 3EB, ROYAUME-UNI

Résumé / Abstract

Interspecific hybridisation with Trifolium nigrescens Viv. is a possible strategy to improve the reproductive potential of white clover (Trifolium repens L.). Following the development of a fertile Fl hybrid, three generations of backcrossing have been carried out using T. repens as the recurrent parent. Vegetative characteristics, stolon growth and seed yield components of the backcross (BC) 2 and 3 generations, as well as the parental species were measured on spaced plants grown in the field. Leaf size and plant spread of the BC2 and BC3 generations were less than T. repens but there was no difference in plant fresh weight. Numbers of inflorescences per plant and florets per inflorescence of the backcrosses were greater than T. repens however this was not reflected in differences in seed yield per plant as T. repens had more seeds per floret and per plant than the backcrosses. Differences in stolon length, the proportion of flowering nodes and the pattern of axillary bud development were observed between T. repens and the backcrosses. Significant variation among the BC 3 generation for vegetative and reproductive traits was observed. Individual plants among the BC 3 generation were identified that combine high forage yield, substantial inflorescence production and good fertility, and these will form the basis of further selection.

Revue / Journal Title

Euphytica   ISSN 0014-2336   CODEN EUPHAA 

Source / Source

2002, vol. 126, n^o2, pp. 195-201 (11 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Dordrecht, PAYS-BAS  (1952) (Revue)

Mots-clés anglais / English Keywords

Bud ; Fodder crop ; Europe ; Spermatophyta ; Angiospermae ; Dicotyledones ; Leguminosae ; Axillary bud ; Fodder ; Biological productivity ; Fecundity ; Yield component ; United Kingdom ; Trifolium repens ; Stolon ; Growth ; Interspecific hybridization ; Sexual reproduction ; Agronomic character ; Genetic variability ; Field experiment ; Hybrid variety ; Intraspecific comparison ;

Mots-clés français / French Keywords

Bourgeon ; Plante fourragère ; Europe ; Spermatophyta ; Angiospermae ; Dicotyledones ; Leguminosae ; Bourgeon axillaire ; Trifolium nigrescens ; Fourrage ; Productivité biologique ; Fécondité ; Composante rendement ; Royaume Uni ; Trifolium repens ; Stolon ; Croissance ; Hybridation interspécifique ; Reproduction sexuée ; Caractère agronomique ; Variabilité génétique ; Essai en champ ; Variété hybride ; Comparaison intraspécifique ;

Mots-clés espagnols / Spanish Keywords

Yema ; Planta forrajera ; Europa ; Spermatophyta ; Angiospermae ; Dicotyledones ; Leguminosae ; Yema axilar ; Forraje ; Productividad biológica ; Fecundidad ; Componente rendimiento ; Reino Unido ; Trifolium repens ; Estolón ; Crecimiento ; Hibridación interespecífica ; Reproducción sexuada ; Carácter agronómico ; Variabilidad genética ; Ensayo en campo ; Variedad híbrida ; Comparación intraespecífica ;

Localisation / Location

INIST-CNRS, Cote INIST : 8245, 35400010466911.0060