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GrainGenes Reference Report: PBR-118-85

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Reference	PBR-118-85
Title	Control of ear emergence time by chromosome 3A of wheat.
Journal	Plant Breeding
Year	1999
Volume	118
Pages	85-87
Author	Miura H Nakagawa M Worland AJ
Abstract	Chromosome 3A wheat is known to carry earliness per se genes. To determine the number of genes and their arm location, ear emergence time under a controlled environment was investigated using ditelosomic lines and homozygous recombinant substitution lines developed between chromosome 3A homologues from 'Timstein' and 'Chinese Spring' (CS) in a CS genetic background. Because the ear emergence distribution was discontinuous and two separate modes were produced, the 86 recombinant lines could be divided into 21 lines as the early 'Tinstein' 3A type and 65 lines as the late CS type. This agrees with the 1:3 independent segregation of two genes both located on chromosome 3A. Therefore, two hypotheses can be proposed, either CS ('Timstein' 3A) carries two genes and both are necessary to give early ear emergence, or one gene for early emergence is present on 'Timstein' 3A, but a suppressor is on CS 3A. The behavior of ditelosomic 3AL and 3AS lines, with an ear emergence time identical to that of CS, suggested that one gene is located on the long arm and the other is on the short arm.
External Databases	https://doi.org/10.1046/j.1439-0523.1999.118001085.x
Gene	Eps-A1a (Triticum) Eps-A1b (Triticum)
Gene Class	Earliness per se (Triticum)
Keyword	crop growth stage [ Show all 8 ]

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