A comparative screening of hybrid, modern varieties and local rice cultivar for brown leaf spot disease susceptibility and yield performance

Abstract

Five rice cultivars, one hybrid (WR96), three modern (BR16, BR26, and BRRI Dhan27) and one local (Pari) were screened for reaction to brown leaf spot disease caused by Cochliobolus miyabeanus and performance of yield-related characters. The severity of brown leaf spot varied with growth stages of rice plant as well as different cultivars tested under field condition. Low disease severity was observed at maximum tillering stage compared to moderate to high at dough stage, with hybrid cultivar WR96 showing highest disease, while local cultivar Pari had the lowest. Brown spot disease severity in different cultivars under induced epiphytic condition also followed the similar trend. The results also revealed that most of the yield-contributing characters examined showed wide variations among the cultivars. Modern cultivar BR16 produced the highest panicle length, number of grain per panicle and grain yield per hectare. At the same time as local cultivar Pari generated the lowest number of tiller per plant, panicle length, grain number per panicle and grain yield per hectare. Moreover, hybrid cultivar WR96 produced the highest percentage of spotted grain per panicle and seed yielding C. miyabeanus, and also the lower percentage of seed germination, while the reverse was observed in local cultivar Pari. These findings may allow producers and breeders to select rice cultivar, resistant or tolerant to brown leaf spot disease and to avoid significant reductions in grain yields.

Growth, Yield and Proximate Composition of Aromatic Rice as Influenced by Inorganic and Organic Fertilizer Management

“…Grain yield differences due to varieties were also reported by Biswas et al (1998). The results agreed with the findings of Sarker et al (2013); Hossain et al (2014); Shiyam et al (2014). The differences in straw yield among the varieties might be attributed to the genetic makeup of the varieties.…”

“…The variation as assessed might be due to genetic characters of the varieties primarily influenced by the heredity. Sarker et al (2013) and Hossain et al (2014) also reported that panicle length varied among varieties.…”

“…Varietal variation regarding the number of filled grains panicle -1 might be due to their variation in genetic constitutions and also due to variation in photosynthetic assimilate accumulation especially after heading. Sarker et al (2013); Hossain et al (2014); Shiyam et al (2014) reported the variable number of filled grains panicle -1 .…”

Biological Management of Plant Diseases by Non-pathogenic Phoma spp.

“…The host plant's enhanced ability to mobilize its innate immunity or defence system against perceived plant pathogen is referred to as priming or induced systemic resistance (ISR) (Hossain et al 2007(Hossain et al , 2008b(Hossain et al , 2014aKojima et al 2013). ISR is considered one of the most efficient mechanisms of plant defence against invading plant pathogens.…”

Performance of locally discovered rice cultivar (Haridhan) in Bangladesh under urea sprays technology

“…(2014);Hossain et al (2014);Shiyam et al (2014);Sarker et al (2013); Baset Mia and Shamsuddin (2011);Jeng et al (2009) andBakul et al (2009) . They also found variation in panicle length due to the variation in genetic make-up of the varieties of rice.…”