The significance of genic balance to endosperm development in interspecific crosses

Stephen Johnston, T. P M den Nijs, S. J. Peloquin, R. E. Hanneman

Research output: Contribution to journalArticle

385 Citations (Scopus)

Abstract

The endosperm has played a significant role in the evolution of angiosperms because of its physiological and genetic relationships to the embryo. One manifestation of this evolutionary role is its abnormal development in interploidy crosses. It is now established that the endosperm develops abnormally in interploidy-intraspecific crosses when the maternal: paternal genome ratio deviates from 2:1 in the endosperm itself. We propose an Endosperm Balance Number (EBN) hypothesis to explain endosperm development in both interploidy-intraspecific and interspecific crosses. Each species is assigned an EBN on the basis of its crossing behavior to a standard species. It is the EBN which determines the effective ploidy in the endosperm of each species, and it is the EBNs which must be in a 2:1, maternal:paternal ratio. The EBN of a species may be determined by a few genes rather than the whole genome. This hypothesis brings most intraspecific-interploidy and interspecific crossing data under a single concept with respect to endosperm function. The implications of this hypothesis to isolating mechanisms, 2n gametes, the evolution of disomic polyploids, and reciprocal differences in seed development are discussed.

Original languageEnglish (US)
Pages (from-to)5-9
Number of pages5
JournalTheoretical And Applied Genetics
Volume57
Issue number1
DOIs
StatePublished - Jan 1980
Externally publishedYes

Fingerprint

Endosperm
endosperm
Mothers
Genome
Angiosperms
disomics
Polyploidy
genome
Ploidies
abnormal development
seed development
ploidy
Germ Cells
polyploidy
genetic relationships
Angiospermae
germ cells
Seeds
Embryonic Structures

Keywords

  • 2n gametes
  • Endosperm
  • Evolution
  • Interspecific crosses
  • Solanums

ASJC Scopus subject areas

  • Genetics(clinical)
  • Genetics
  • Plant Science
  • Horticulture
  • Agronomy and Crop Science

Cite this

The significance of genic balance to endosperm development in interspecific crosses. / Johnston, Stephen; den Nijs, T. P M; Peloquin, S. J.; Hanneman, R. E.

In: Theoretical And Applied Genetics, Vol. 57, No. 1, 01.1980, p. 5-9.

Research output: Contribution to journalArticle

Johnston, Stephen ; den Nijs, T. P M ; Peloquin, S. J. ; Hanneman, R. E. / The significance of genic balance to endosperm development in interspecific crosses. In: Theoretical And Applied Genetics. 1980 ; Vol. 57, No. 1. pp. 5-9.
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