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The Amphiploid Hordeum chilense × Triticum aestivum ssp. sphacrocoecum. Variability in Octoploid Tritordeum
Author(s) -
Martin A.,
Padjlla J. A.,
FernandezEscobar J.
Publication year - 1987
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1987.tb01192.x
Subject(s) - biology , hybrid , pollen , hordeum , botany , poaceae , chromosome pairing , agronomy , ploidy , hordeum vulgare , genetics , gene
In order to increase variability in the octopioid tritordeum a new octoploid tritordeum has been synthesized after colchicine doubling of the chromosomes of the Hordeum chilense × Triticum aestivum ssp. sphaerococcum hybrid. The amphiploid showed full pairing in 30 % of the pollen mother cells, The fertility was higher than in previous tritordeums (1.65 grains per spikelet and 43.00 grains per spike). Hybrids between the octoploid tritorceums were sterile. However, hexaploid × octopiold trhordeum hybrids were fertile and secondary tritordeums were extracted with increased fertility.