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Heterosis for tuber yields and total solids content in 4x x 2x FDR-CO crosses

Published online by Cambridge University Press:  05 March 2012

M.F. Masson
Affiliation:
Germicopa Research & Creation
S.J. Peloquin
Affiliation:
University of Wisconsin
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Summary

INTRODUCTION

Peloquin (1982) proposed five breeding schemes for the utilization of primitive cultivars and wild relatives of the potato, Solanum tuberosum ssp. tuberosum (Tuberosum) (2n = 4x = 48). Of these breeding schemes, 4x x 2x crosses (unilateral sexual tetraploidization), using diploids which produce 2n gametes, allow the breeder to obtain almost entirely 4x progenies, due to the strong triploid block existing in potato and its wild relatives (Johnston et. al. 1980).

Tetraploid offspring with high tuber yields, good vine vigour and significant heterosis have been reported from 4x x 2x crosses (Hanneman & Peloquin 1969; Mok & Peloquin 1975; Kidane-Mariam & Peloquin 1974; 1975; Mendiburu & Peloquin 1977; De Jong & Tai 1977; De Jong et al. 1981; McHale & Lauer 1981; Schroeder 1983). In their crosses the 2x clones, used as males, produced 2n pollen by first division restitution (FDR).

This paper presents results obtained from 4x progenies of 4x x 2x FDR crosses. The experiment was carried out in France during 1983 and three major economic traits were studied: total tuber yield, marketable tuber yield and total solids.

MATERIALS AND METHODS

During the spring of 1981, 4x x 2x crosses were made in the glasshouses of the GIE Germicopa Recherche et Création, at Chateauneuf du Faou, France. Six European cultivars (2n = 4x = 48) - Claustar, Spunta, BF 15, Sirtema, Charlotte and Desiree - were used as seed parents. US-W 5295.7 and five progeny clones of US-W 5295.7 x US-W 5337.3 from the University of Wisconsin potato programme were used as male parents.

Type
Chapter
Information
The Production of New Potato Varieties
Technological Advances
, pp. 213 - 217
Publisher: Cambridge University Press
Print publication year: 1987

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