Interspecific hybrids between asparagus schoberioides kunth and A. officinalis L.

T. Ochiai, A. Kanno, T. Kameya, T. Sonoda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)

Abstract

Interspecific hybrids are very important breeding materials to introduce new genes from wild species into crop plants. In this study, A. officinalis (2n=2x=20) cv. Mary Washington 500W was crossed with A. schoberioides (2n=4x=40), which is a dioecious species distributed in China, Korea and Japan. We obtained putative interspecific hybrid plants from reciprocal crosses between these two species. Five F1 progenies (A. schoberioides × A. officinalis) were used for cytological and RFLP analyses. The chromosome number of all F1 progenies was 2n=3x=30. The RFLP patterns of chloroplast DNA in the progenies were the same as the pattern of maternal parent, A. schoberioides. Additionally, the RFLP patterns of ribosomal DNA in the progenies shared the fragments specific for both parents. These results suggest that the cytoplasm of putative hybrid plants was derived from the maternal parent and that nuclear DNA of the plant was derived from both parents, showing that these progenies were interspecific hybrids between A. schoberioides and A. officinalis. The morphological characters of five hybrid plants appeared to be mixtures of both parents. Out of five plants, three plants flowered; one was male and two were females. This indicates that these two species seem to have the same mechanism of sex determination.

Original languageEnglish
Title of host publicationX International Asparagus Symposium
PublisherInternational Society for Horticultural Science
Pages225-229
Number of pages5
ISBN (Print)9789066057968
DOIs
Publication statusPublished - 2002 Jan 1

Publication series

NameActa Horticulturae
Volume589
ISSN (Print)0567-7572

Keywords

  • Asparagus officinalis
  • Asparagus schoberioides
  • Interspecific hybrids
  • Mechanism of sex determination
  • Reciprocal cross

ASJC Scopus subject areas

  • Horticulture

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