Breeding Disease-Resistant Wheats for Tropical Highlands and Lowlands

Dubin, H. J.; Rajaram, S.

doi:10.1146/annurev.phyto.34.1.503

Cited by 62 publications

(45 citation statements)

References 21 publications

(18 reference statements)

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“…The use of resistant varieties/rootstocks and fungicides are therefore the simplest and most eff ective methods to reduce the severity of fungal diseases (Dubin and Rajaram, 1996;Shephard, 1997). However, resistance is overcome by the genetic diversity of fungal pathogens as well as by genotype × environmental interactions (Bayles et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

The role of silicon (Si) in increasing plant resistance against fungal diseases

Sakr

2016

Hellenic Plant Protection Journal

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Summary The use of silicon (Si) in agriculture has attracted a great deal of interest from researchers because of the numerous benefits of this element to plants. The use of silicon has decreased the intensity of several diseases in crops of great economic importance. In this study, the relationship between silicon nutrition and fungal disease development in plants was reviewed. The current review underlines the agricultural importance of silicon in crops, the potential for controlling fungal plant pathogens by silicon treatment, the different mechanisms of silicon-enhanced resistance, and the inhibitory effects of silicon on plant pathogenic fungi in vitro. By combining the data presented in this paper, a better comprehension of the relationship between silicon treatments, increasing plant resistance, and decreasing severity of fungal diseases could be achieved.

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Section: Introductionmentioning

confidence: 99%

The role of silicon (Si) in increasing plant resistance against fungal diseases

Sakr

2016

Hellenic Plant Protection Journal

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“…(Dastur 1942;Maraite 1998). As an important biotic stress to growing wheat in humid and warm areas, this foliar disease has long been recognized (Saari and Wilcoxson 1974;Dubin et al 1991;Dubin and Rajaram 1996;Duveiller 2004;Joshi et al 2007a;Eisa et al 2013). C. sativus is a non-specific hemi-biotrophic fungus with worldwide distribution and is found mainly on wheat, triticale and barley, causing seedling blight, SB on leaves, black point on grains, and common root rot on the sub-crown internodes.…”

Section: Introductionmentioning

confidence: 99%

“…Early researches on SB involved screening for new resistant germplasm from Zambia, Brazil and the Yangtze River Valley in China, and many lines with satisfactory levels of resistance were identified, which were then widely used in the CIMMYT's wheat breeding programs and were tested in international nurseries in epidemic regions (Dubin and Rajaram 1996;Mehta et al 1996;Dubin et al 1998; van Ginkel and Rajaram 1998). Resistance sources were also sought in wide cross derivatives made at CIMMYT, and a number of lines with good resistance to SB were identified (Mujeeb-Kazi et al 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Moderate (0.58-0.62) to high (0.71-0.72) heritability estimates of SB resistance have been reported, indicating the effectiveness of selection for this trait in segregating populations generated from parents with different resistance levels (Sharma and Duveiller 2003;Joshi et al 2004;Kumar et al 2009Kumar et al , 2010. It was also suggested that selection for this trait should be done in advanced generations in order to accumulate minor resistance genes (Dubin and Rajaram 1996;Joshi et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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Development and characterization of the 4th CSISA-spot blotch nursery of bread wheat

Singh

Yong

et al. 2015

Eur J Plant Pathol

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Spot blotch (SB) caused by Cochliobolus sativus is a serious biotic stress to wheat in warm and humid areas, particularly South Asia (SA). In order to support South Asian farmers to combat SB, International Maize and Wheat Improvement Center (CIMMYT) established an efficient SB screening system at Agua Fria, Mexico and developed a nursery under the project -Cereal Systems Initiative for South Asia (CSISA). The materials used to form CSISA-SB nursery were selected from advanced breeding lines from different wheat breeding programs at CIMMYT. Seed of CSISA-SB nursery was produced at diseasefree plots at El Batan and Mexicali, and distributed to SA after rigorous seed health checks. The 4th CSISA-SB, made available in 2012, comprised 50 entries including two resistant and two susceptible checks. The nursery was evaluated in seven locations in Mexico, India, and Bangladesh in the 2012-13 cropping season. The results indicated that although few lines exhibited stable resistance across locations due to strong G × E interaction, promising lines with SB resistance and good agronomy can still be identified in each location. The two most promising lines showing consistent spot blotch resistance across the regions were CHUKUI#1 (CIMMYT germplasm bank identification number, GID 6178575) and VAYI#1 (GID 6279248). These lines Eur J Plant Pathol (2015) 143:595-605 could be promoted as sources of SB resistance or directly released as cultivars in SA.

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“…Selection and breeding for resistant cultivars is the main disease management strategy for a sustainable agriculture. Duveiller and Gilchrist (1994) and Dubin and Rajaram (1996) reported several sources of spot blotch resistance in wheat but high yielding genotypes resistant to the disease is not yet available. Most of the improved and recommended wheat cultivars in Nepal are severely attacked by foliar blight (Shrestha et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Controlling Foliar Blight of Wheat through Nutrient Management and Varietal Selection

Kandel¹,

Mahato

2014

Nepal Agric. Res. J.

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Helminthosporium leaf blight, a complex of spot blotch caused by Bipolaris sorokiniana and tan spot caused by Pyrenophora tritici-repentis, is one of the most important foliar diseases of wheat in Nepal. It appears in almost all wheat growing areas and causes severe yield loss every year. A study was conducted at Regional Agriculture Research Station (RARS), Tarahara, Sunsari during 2004-05 and 2005-06 wheat growing seasons to elucidate role of nitrogen in wheat genotypes for management of the disease. Field experiment was laid out on split plot design with three replications. Four doses of nitrogen in six different promising genotypes were tested. Nitrogen levels higher than 50 kg ha -1 significantly reduced disease severity and increased grain yield in all genotypes but there was no significant differences in grain yield in the first year. In the second year, grain yield difference among the genotypes was significant. Area under disease progress curve (AUDPC) was not significant between two doses 100 and 150 kg ha -1 . The wheat genotypes showed different reactions to disease. Genotype BL 2047 had the lowest incidence of disease followed by BL 1887, whereas BL 2217 had the highest incidence of the disease. Genotype BL 2196 produced the highest grain yield (2172 kg ha -1 ) and the lowest grain yield was obtained in Bhrikuti followed by BL 2089. These results suggested that fertilizer should be applied in soil at balanced dose 100:50:50 N:P 2 O 5 :K 2 O kg ha -1 . Growing relatively resistant genotypes with the balance dose of fertilizers can reduce foliar blight severity in wheat.

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Breeding Disease-Resistant Wheats for Tropical Highlands and Lowlands

Cited by 62 publications

References 21 publications

The role of silicon (Si) in increasing plant resistance against fungal diseases

The role of silicon (Si) in increasing plant resistance against fungal diseases

Development and characterization of the 4th CSISA-spot blotch nursery of bread wheat

Controlling Foliar Blight of Wheat through Nutrient Management and Varietal Selection

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