Identification and Characterization of Slow Rusting Components in Pea (Pisum sativum L.)

Abstract

Three hundred and forty five accessions of pea of diverse origin, height, leaf types and disease reaction were screened for rust disease severity and area under disease progress curve (AUDPC). The frequency of slow rusting types in the tall, dwarf, early and late groups appeared comparable. Of the 345 accessions, forty-four genotypes were evaluated for disease intensity, which was converted into AUDPC, number of pustules/leaf and pustule size. Wide range of variation was found for these traits. The slow rusting attribute of 16 genotypes was further confirmed by testing these under unprotected (inoculated) and protected (fungicidal spray) conditions for two successive years for disease intensity by assessing the AUDPC, seed yield/plot, and 100-seed weight. The fast rusting genotypes exhibited lower AUDPC, accompanied with increased seed yield and seed weight when grown under the protected condition, as compared to those raised under the unprotected condition. The genotypes Pant P 11, FC 1, HUDP 16, JPBB 3 and HUP 14 appeared as slow rusting genotypes.

Establishing an association between molecular markers and sheath blight (Rhizoctonia solani Kuhn) resistance in rice

“…The genotypes with higher AUDPC and PDI values are more susceptible to sheath blight than those with lower values. AUDPC and PDI values in the present study are quite similar to that observed by Chand et al (2006), Taheri et al (2007) and Adhipathi et al (2013).…”

Resistance to rusts (Uromyces pisi and U. viciae-fabae) in pea

“…These studies revealed that the majority of the studied pea genotypes were susceptible, though genotypic differences in the rust intensity described as of slow rusting type have been reported (Kumar et al 1994;Chand et al 2006) (Table 1). Slow rusting resistance against U. viciae-fabae has been characterised by measuring the area under the disease progress curve (AUDPC), the disease severity (DS), the number of pustules/leaf or infection frequency (IF) and the pustule size .…”

“…The correlation observed between DS values measured under field conditions during three growing seasons, and between DS and AUDPC was high (Barilli et al 2009b) suggesting that the final DS estimation on pea provides a feasible estimation of partial resistance. DS estimation Sohi et al (1974) PJ207508, PJ22211, EC109188 monogenic inheritance Pal et al (1979Pal et al ( , 1980 RPB-22, RA-10-5, RC-35-2 Abusaleha and Pal (1990) Pant P11, FC1, HUDP 16, JPBB 3, HUP 14 monogenic (putative Ruf ) inheritance Chand et al (2006); Kushwaha et al (2006) U. pisi IFPI3260, PI347321, PI347336, PI347347, PI343935, PI343965, PI347310 inheritance under study Barilli et al (2009a, b) needs less computation and is less time-consuming than assessing AUDPC, epidemic growth rate (r) or the first pustule appearance (t 0 ). The epidemic growth rate and the first pustule appearance were poor estimators of U. pisi partial resistance as they were less discriminating than the other parameters and showed a low correlation within experimental designs.…”

“…The dominant nature of partial resistance against faba bean rust U. viciae-fabae in pea, recorded as reduced infection frequency, has been justified as the expression of a single major gene, for which the symbol Ruf was proposed (Vijayalakshmi et al 2005), but the authors also presented some evidence suggesting involvement of some polygenes as well. Further, none of the pea genotypes has been reported to be free from U. viciae-fabae infection (Singh & Sivastava 1985;Chand et al 2006) suggesting a polygenic type of resistance or based on incomplete gene expression.…”

Disease resistance in pea (Pisum sativum L.) types for autumn sowings in Mediterranean environments - a review

“…Several sources of incomplete resistance against U. viciae-fabae have been reported (Pal et al 1980;Xue & Warketin 2001;Vijayalakshmi et al 2005;Chand et al 2006;Kushwaha et al 2006). A single major gene (Ruf) has been reported as responsible for this partial resistance.…”