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Science 30 July 1982:
Vol. 217. no. 4558, pp. 446 - 448
DOI: 10.1126/science.217.4558.446
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Articles

Manipulations of Endosperm Balance Number Overcome Crossing Barriers Between Diploid Solanum Species

S. A. JOHNSTON 1 and R. E. HANNEMAN JR. 2

1 Department of Horticulture, University of Wisconsin, Madison 53706
2 Agricultural Research Service and Department of Horticulture, University of Wisconsin

Abortion of the hybrid endosperm is the basis for the inability to hybridize many angiosperm species. This has made it nearly impossible to incorporate the valuable characteristics from several wild, diploid Solanum species into the cultivated potato Solanum tuberosum. But some wild species have "endosperm balance numbers" different from those of most Solanum diploid species, and these numbers or "effective ploidies" can be manipulated to create new hybrids.

Submitted on November 23, 1981
Revised on April 5, 1982


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Endosperm balance number manipulation for direct in vivo germplasm introgression to potato from a sexually isolated relative (Solanum commersonii Dun.).
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