GrainGenes Reference Report: TAG-90-430
Reference
TAG-90-430
Title
The cytogenetics of a Triticum turgidum X Psathyrostachys juncea hybrid and its backcross derivatives
Journal
Theoretical and Applied Genetics
Year
1995
Volume
90
Pages
430-437
Author
Mujebb-Kazi A Cortes A Riera-Lizarazu O
Abstract
Psathyrostachys juncea (2n = 2x = 14, NN), a source of barley yellow dwarf (BYDV) virus resistance with tolerance to drought and salinity, has been successfully hybridized in its autotetraploid form (2n = 4x = 28, NNNN) as the pollen parent to durum wheat (Triticum turgidum L. The 2n = 4x = 28 (ABNN) F1 hybrid has a mean meiotic metaphase-I configuration of 20.29 univalents + 0.29 ring bivalents + 3.36 rod bivalents + 0.14 trivalents. Spike length, internode length, glume awn length and lemma awn length, as well as the general spike morphology of the F1 hybrid, are intermediate with those of the two parents. Pollinating the ABNN F1 hybrid has given backcross (BC)-I derivatives of an amphiploid (AABBNN) that expresses limited self-fertility. BC-2 derivatives have been obtained from these plants. Direct transfers of useful genes from Ps. juncea to wheat would require substantial genetic manipulation strategies. Both conventional and novel methodologies, which may complement each other, and so facilitate reaching an agricultural objective end point, are addressed.
Keyword
backcrossing
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: TAG-90-430
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||