NEW SELECTION TECHNIQUES TO DETECT SOURCES OF RESISTANCE AGAINST STRIPE RUST IN WHEAT

Abstract

Stripe rust is the most important biotic constraint in wheat production. Deployment of resistant wheat cultivars is the most practical way to decrease yield losses attributed to stripe rust. Usage of wild germplasm of wheat is the best technique to detect new resistant genes for the evolution of new varieties and mainstream of these hold capacity for disease resistance. Traditional procedures of gene identification by using conventional screening through diversified races do not generate accurate data. In conventional breeding, transferring desired traits, for instance, stripe rust resistance, from a donor parent is offered into a genotype of interest, typically high yielding. Identification of the sources of resistance by conventional screening through diversified races and backcross breeding is time-consuming which could be avoided through the usage of DNA markers. Marker-assisted selection (MAS) is practiced for the improvement of a variety of traits in wheat around the world through introgression of disease resistance against diseases including stripe rust, which may in any case partially support in providing the anticipated result. MAS has been valuable for the development of quite a lot of significant traits such as resistance against diseases. Marker-assisted backcrossing, forward breeding, and MAS involving doubled haploid technology have been effectively used for this objective. Novel skills based on high throughput genotyping related with new marker systems (e.g., Diversity arrays technology DArT and as Single Nucleotide Polymorphism SNP), and new selection strategies such as (Advanced backcross QTL AB-QTL), mapping-as-you-go, marker-assisted recurrent selection, and genome-wide selection will have to be tried in future for upgrading of compound multigenic traits. The improvement made in all these features of marker-assisted wheat breeding, and the restrictions and future scenarios of this incipient technology have been reviewed in this article.