Effect of yellow rust on yield components of barley cultivars with race-specific and slow rusting resistance to yellow rust

Abstract

2012) Effect of yellow rust on yield components of barley cultivars with race-specific and slow rusting resistance to yellow rust, Archives Of Phytopathology And Plant Protection, Yellow rust caused by Puccinia striiformis f. sp. hordei is an important disease of barley (Hordeum vulgare L.) in some parts of the world. We compared the effectiveness of different types of resistance in field plots at Ardabil Agricultural Research Station (Iran) during 2010-2011. Yield components along with slow rusting parameters including final rust severity (FRS), apparent infection rate (r), relative area under disease progress curve (rAUDPC) and coefficient of infection (CI) were evaluated for 25 barley cultivars. In all, two barley cultivars with racespecific resistance, 19 cultivars with different levels of slow rusting resistance and four susceptible cultivars were included in two experiments with and without fungicide protection under high disease pressure. Barley cultivars with slow rusting resistance displayed a range of severity responses indicating phenotypic diversity. Mean thousand kernels weight (TKW) losses for susceptible, racespecific and slow rusting genotypes were 31, 3 and 12%, respectively, and mean kernels per spike (KPS) losses for susceptible, race-specific and slow rusting genotypes were 19, 0.2 and 8%, respectively. Correlation coefficient of mean TKW and KPS losses with epidemiological parameters; rAUDPC, r, CI and FRS were highly significant. Slow rusting cultivars with low values of different parameters as well as genotypes with low yield component losses despite moderate disease levels were identified. Such genotypes can be used for breeding barely genotypes with high levels of resistance and negligible yield losses.

Stripe Rust Partial Resistance Increases Spring Bread Wheat Yield in South‐eastern Anatolia, Turkey

“…Similarly, Safavi (2015) reported a TKW loss of 40.1% in the susceptible cultivar Morocco and a TW loss of 19% in susceptible genotypes (Everts et al 2001). The higher loss in TKW and TW reached 40.8 and 8.89% in Diyarbakır, 20.4 and 20.8% in Adıyaman, respectively.…”

“…The highest TKW and TW loss occurred in Nurkent, G3 and Karacada g-98 in both locations. Similarly, Safavi (2015) reported a TKW loss of 40.1% in the susceptible cultivar Morocco and a TW loss of 19% in susceptible genotypes (Everts et al 2001). Stripe and leaf rust decreased the photosynthesis area and consequently lowered the percentages of yield and yield components (Herrera-Foessel et al 2007).…”

Characterization of Partial Resistance to Stripe Rust (Puccinia striiformis f.sp. tritici) in some Egyptian Wheat Cultivars

“…The previous studies of Sharma-Poudyal and Chen (2011), Safar (2015) and Afzal et al (2007) reported that the stripe rust can cause approximately complete yield loss (100%) when severe infection occurs very early in the growth stage and the disease continues to develop under favorable environmental conditions, during the growing season. While, under Egyptian field conditions, Omara et al (2016) showed that the actual percentage loss in grain yield of some highly susceptible wheat cultivars ranged between 53.7 and 55.4%.…”

Güneydoğu Anadolu Orijinli Yerel Makarnalık Buğday (Triticum durum Desf.) Genotiplerinin Bazı Tarımsal Karakterler Bakımından Değerlendirilmesi

“…Her iki sezonda da % MR (Orta dayanıklı) ile 90S arasında değişmiş, genel olarak hassas olan çeşitler daha düşük tane verimine sahip olmuşlardır (Tablo 4). Benzer sonuçlar Aktaş (2014) tarafından belirtilmiş olup, yerel buğday çeşitlerinin yüz yıllar boyunca aynı çevrede yetiştirilmesi bazı sarı pas patotiplerine karşı hassas hale geldiği, başka bir ifade ile bu patotiplerin bu yerel buğdayların savunma mekanizmaları üzerinde uzmanlaştığı, fakat hastalık seyrinin bayrak yaprağı üzerinde gelişiminin yavaş olduğu bildirilmektedir (Ali ve ark., 2007;Safavi, 2015).…”