Gibberellic Acid and 2,4D Treatments for Wheat Barley Hybridization Using Detached Spikes Academic Article uri icon

abstract

  • Wide hybridization is a complementary alternative for transferring desirable traits between wheat (Triticum aestivum L.) and barley (Hordeum vulgare Lo). Direct hybridization procedures have proven ineffectual because of genetic dissimilarities between diverse gene pools. Progress has been made by applying growth hormones prior to and after pollination. Using crossable lines has also contributed to successful hybridization. Detached spikes were used to evaluate the effect of 2,4dichlorophenoxyacetic acid (2,4D) and gibberellic acid (GA3) on crossing success between Fukuhokomugi (Fukuho) wheat and Luther barley. Seed set was best when Fukuho was the maternal parent. More embryos were obtained by adding high concentrations of 2,4D to the detachedspike culture medium (up to 225 mol kgl). This synthetic hormone had no effect on embryo formation when barley was used as the female parent. Gibberellic acid (8.3 to 29.8 mol kg1) did not affect embryo formation, regardless of the cross direction. The 2,4Dinduced increase in embryo set is presumably attributed to enhanced embryo survivability.

published proceedings

  • Crop Science

author list (cited authors)

  • RieraLizarazu, O., Dewey, W. G., & Carman, J. G.

citation count

  • 3

complete list of authors

  • Riera‐Lizarazu, Oscar||Dewey, Wade G||Carman, John G

publication date

  • January 1992

publisher