Record Details

Overview of approaches in breeding for host resistance in sugarcane

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Overview of approaches in breeding for host resistance in sugarcane
Not Available
 
Creator Viswanathan, R., P. Padmanaban, M. Balamuralikrishnan, D. Mohanraj and N. Prakasam
 
Subject Sugarcane, resistant, germplasm, red rot, smut, hybrids, pathotypes
 
Description Not Available
Among the different management strategies, cultivation of disease resistant varieties is the most sustainable way of cane cultivation. Resistant varieties were introduced in the past to the regions affected by severe epiphytotics of red rot, smut and wilt and the newly released varieties rescued sugar industries from the threat of their closure. However, the released varieties succumb to the newly emerging pathotypes in a short period of time, which is often referred to as ‘varietal breakdown’ in sugarcane. Also inheritance to red rot and other diseases in sugarcane has not been clearly understood due to genetic complexities of the crop. However, efforts are being made at the institute to identify sources of resistance to red rot and smut from different species of Saccharum, allied genera, foreign hybrids and commercial hybrids housed in the world sugarcane germplasm collections and in other collections. As there is a change in red rot pathogenic flora resistance in sugarcane germplasm to red rot is being updated. Recently red rot resistance in the clones of allied genera Erianthus spp. was identified. Progenies of Erianthus and commercial hybrids have shown promising levels of red rot resistance. The methods used to evaluate red rot under field conditions viz. plug and nodal methods are time consuming, hence a controlled condition testing method was developed to identify red rot resistance in germplasm clones / progenies rapidly. Variability in C. falcatum is enormous. Different isolates were characterized using a set of host differentials and categorized them as pathotypes/races. Further, variability existing among different pathotypes was established using RAPD, ITS sequencing, vegetative compatibility grouping, virulence determinants etc. This information would effectively group the pathogen variation very efficiently. Similarly, variability in Fusarium spp. causing wilt is being assessed by cultural, morphological and molecular tools such as IGS-RFLP, RAPD, SSR and ISSR markers. In molecular breeding approaches, red rot/smut resistant markers are being identified / validated. This effort would hasten breeding for disease resistance and may scale down the period involved in varietal development. Genetic transformation protocols were standardized in sugarcane. Identification of potential anti-fungal genes would pave way for their expression in sugarcane varieties having high agronomic attributes.
Not Available
 
Date 2021-08-13T03:32:55Z
2021-08-13T03:32:55Z
2007-01-01
 
Type Research Paper
 
Identifier Not Available
0971-9393
http://krishi.icar.gov.in/jspui/handle/123456789/55893
 
Language English
 
Relation Not Available;