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Annals of Botany 77: 539-542, 1996
© 1996 Annals of Botany Company

Nature of ‘Pollinator’ Effect in Potato (Solanum tuberosum L.) Haploid Production

STANLEY J. PELOQUIN, AUGUST C. GABERT and RODOMIRO ORTIZ+

Departments of Horticulture and Genetics, University Wisconsin Madison, 1575 Linden Drive, Madison, WI, USA

July 31, 1995 ; December 13, 1995

Haploids (2n =24) of the common tetraploid (2n=48) potato (Solanum tuberosumL.) provide promising material for attacking many problems concerned with the genetics, cytogenetics and breeding of this species. Interspecific 4xx2xcrosses betweenSolanum tuberosumgp.Andigenaor gp.Tuberosumcultivars as pistillate parents andSolanum tuberosumgp.Phurejaas source of pollen (hereafter ‘pollinator’) have been used to produce maternally derived haploids through parthenogenesis. This paper discusses the nature of the ‘pollinator’ effect in haploid extraction. The ‘pollinator’ had a significant effect on haploid frequencies following 4xx2xcrosses. The ‘pollinator’ effect seems to operate via the endosperm, in which haploid (n=2x) embryos are associated with hexaploid endosperm. A superior ‘pollinator’ appears to have its effect by contributing two haploid (n) gametes to the central cell.

2n pollen; double fertilization; endosperm; ploidy manipulations; Solanum tuberosum


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Ploidy manipulation of the gametophyte, endosperm and sporophyte in nature and for crop improvement: a tribute to Professor Stanley J. Peloquin (1921-2008)
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