Identification and characterization of resistance to yellow rust and powdery mildew in wild emmer wheat and their transfer to bread wheat

In wild emmer wheat three different kinds of genes for resistance to yellow rust were found, namely genes causing overall resistance, genes causing adult-plant resistance and genes which induce resistance detectable at higher temperatures. At least eleven different and probably novel major genes for overall resistance to yellow rust were detected. The inheritance of overall resistance genes and temperature-sensitive genes was found to be mainly dominant, while the latter showed an additive gene action as well. Several new sources of resistance to powdery mildew were found. These include overall resistance, true seedling resistance, adult- plant resistance and partial resistance. There proved to be no serious crossing barrier between tetraploid wild emmer and hexaploid bread wheat. It was shown that genes for resistance as well as other positive traits are readily transferable to bread wheat, while the negative traits of wild emmer can be easily removed. Two or three consecutive crosses with bread wheat appeared to be optimal for developing wild emmer-derived germplasm or varieties.

Bibliographic Details

Main Author:	van Silfhout, C.H.
Other Authors:	Parlevliet, J.E.
Format:	Doctoral thesis biblioteca
Language:	English
Published:	Landbouwuniversiteit Wageningen
Subjects:	disease resistance, hexaploidy, hybrids, interspecific hybridization, pest resistance, plant breeding, plant pathogenic fungi, puccinia, puccinia striiformis, somatic hybridization, triticum aestivum, wheat, hexaploïdie, hybriden, plaagresistentie, plantenveredeling, plantenziekteverwekkende schimmels, somatische hybridisatie, soortkruising, tarwe, ziekteresistentie,
Online Access:	https://research.wur.nl/en/publications/identification-and-characterization-of-resistance-to-yellow-rust-
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