| Somaclonal variation for disease resistance in wheat and production of dihaploids through wheat x maize hybrids | |
Abstract/OtherAbstract
:
|
Seven wheat cultivars having some degree of resistance to Bipolaris sorokiniana, Magnaporthe grisea or Xanthomonas campestris pv. undulosa (Xcu) provided somaclonal variation for disease resistance. Callus induction varied from 69.4 to 100% across the cultivars, whereas regeneration frequency of R1 plants (regenerated plants of first generation) varied between 2.7 and 23.1%. Resistance variation in the R2-regenerated second generation plants was observed for B. sorokiniana and M. grisea but not for Xcu. Attempts were made to fix the resistance characteristics of R3-regenerated third generation somaclones through wheat x maize hybrids. Wheat and maize hybridization of seven wheat somaclones yielded 81 embryos. A total of 11,624 somaclone florets were pollinated, of which 8.4% produced haploid embryos across the seven wheat genotypes. Hybrid embryo production varied between 0 and 25%. The somaclones had a constant chromosome number as observed in their original hexaploid wheat genotypes (2n = 6x = 42) whereas the haploid plants had n = 21. Hybrid embryo production and haploid and dihaploid plant production were affected by 2,4-D concentration, but not by the wheat genotype. |
Authors
:
|
Mehta Yeshwant R., Angra Dilma C. |
Contributors
:
|
- |
Publication Detail
:
|
Publisher : Sociedade Brasileira de Genética Type : - Format : - |
Date Detail
:
|
2000 |
Subject
:
|
- |
Coverage
:
|
- |
Relation
:
|
- |
Source
:
|
Genetics and Molecular Biology |
Copyright Information
:
|
- |
Other Details
:
|
Languages : - |
Export Citation
:
|
APA/MLA Format Download EndNote Download BibTex |
Previous Document: Analysis of the synaptonemal complex of the nine-banded armadillo, Dasypus novemcinctus
Next Document: A comparison of three certification systems with the 2005 McDonald-Dunn Forest plan revision