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TILL-D: An Aegilops tauschii TILLING Resource for Wheat Improvement.
- Source :
- Frontiers in Plant Science; 11/14/2018, pN.PAG-N.PAG, 9p
- Publication Year :
- 2018
-
Abstract
- Aegilops tauschii (2n = 2x = 14, genome DD), also known as Tausch's goatgrass, is the D genome donor of bread or hexaploid wheat Triticum aestivum (2n = 2x = 42, AABBDD genome). It is a rich reservoir of useful genes for biotic and abiotic stress tolerance for wheat improvement. We developed a TILLING (Targeting Induced Local Lesions In Genomes) resource for Ae. tauschii for discovery and validation of useful genes in the D genome of wheat. The population, referred to as TILL-D, was developed with ethyl methanesulfonate (EMS) mutagen. The survival rate in M<subscript>1</subscript> generation was 73%, out of which 22% plants were sterile. In the M<subscript>2</subscript> generation 25% of the planted seeds showed phenotypic mutations such as albinos, chlorinas, no germination, variegated, sterile and partially fertile events, and 2,656 produced fertile M<subscript>2</subscript> plants. The waxy gene was used to calculate the mutation frequency (1/70 kb) of the developed population, which was found to be higher than known mutation frequencies for diploid plants (1/89–1/1000 kb), but lower than that for a polyploid species (1/24–1/51 kb). The TILL-D resource, together with the newly published Ae. tauschii reference genome sequence, will facilitate gene discoveries and validations of agronomically important traits and their eventual fine transfer in bread wheat. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1664462X
- Database :
- Complementary Index
- Journal :
- Frontiers in Plant Science
- Publication Type :
- Academic Journal
- Accession number :
- 133013646
- Full Text :
- https://doi.org/10.3389/fpls.2018.01665