Genetic variability for resistance to sorghum downy mildew (Peronosclerospora sorghi) and Rajasthan downy mildew (P. heteropogoni) in the tropical/sub-tropical Asian maize germplasm

Yen, Tran Thi Oanh; Prasanna, B. M.; Setty, T.A.S.; Rathore, R. S.

doi:10.1023/b:euph.0000047058.98223.b0

Cited by 13 publications

(15 citation statements)

References 10 publications

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“…Screening for resistance to the SDM has been carried out in the field (Anahosur and Hegde (1979), Cardwell et al, 1997, George et al, 2003, Yen et al, 2004, Nair et al, 2004and Nair et al, 2005 and in the green house (Jones, 1970, Schmitt and Freytag, 1974, Craig, 1976, and Narayana et al, 1995.…”

Section: Sorghum Downy Mildew -Screening Methodsmentioning

confidence: 99%

“…In India, SDM nursery has been maintained at the University of Agricultural SciencesRegional Research Station (UAS-RRS), Mandya in Karnataka state , George et al, 2003, Yen et al, 2004, Nair et al, 2004and 2005. It is considered to be the National Centre for investigations on maize downy mildew in India (Krishnappa et al, 1995).…”

Section: Field Screeningmentioning

confidence: 99%

“…Normally disease assessment has been carried out as per standard procedure given by Lal and Singh (1984) worldwide in case of systemic downy mildew diseases by recording the per cent downy mildew diseased plants. Based on per cent downy mildew incidence, a rating scale has been developed as 0 -10 per cent: resistant (R); >10 -30 per cent: moderately resistant (MR); >30 -50 per cent: moderately susceptible (MS); >50 per cent: susceptible (S) (Yen et al, 2004, Nair et al, 2004and 2005.…”

Section: Field Screeningmentioning

confidence: 99%

“…Genetic information relating to host resistance would provide more relevant basis for making breeding decisions. Considerable data have been reported concerning sources of resistance (Craig et al, 1977;Schmitt et al, 1977;Lima et al, 1982;De Leon et al, 1993;Setty et al, 2001;Ajala et al, 2003 andYen et al, 2004). Information on the mode of inheritance of resistance to downy mildew, however, is limited in maize.…”

Section: Genetics Of Resistance To Sorghum Downy Mildewmentioning

confidence: 99%

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Sorghum Downy Mildew of Maize – A Review

Arulselvi¹,

Selvi²,

Pandiyan³

2018

Int.J.Curr.Microbiol.App.Sci

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Section: Sorghum Downy Mildew -Screening Methodsmentioning

confidence: 99%

Section: Field Screeningmentioning

confidence: 99%

Section: Field Screeningmentioning

confidence: 99%

Section: Genetics Of Resistance To Sorghum Downy Mildewmentioning

confidence: 99%

See 2 more Smart Citations

Sorghum Downy Mildew of Maize – A Review

Arulselvi¹,

Selvi²,

Pandiyan³

2018

Int.J.Curr.Microbiol.App.Sci

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“…Several downy mildew resistant maize lines have been identified for use in resistance breeding programs (Yen et al 2004;Rashid et al 2013). Variability in different maize cultivars with respect to the level of resistance to P. sorghi has been described *Corresponding authors;E-mails: velazhahan@hotmail.com;sireesha.yeturi@gmail.com Cereal Research Communications 45, 2017 (George et al 2004), but the mechanism of resistance remains elusive.…”

Section: Introductionmentioning

confidence: 99%

Analysis of defense genes expression in maize upon infection with Peronosclerospora sorghi

Yeturi

Velazhahan

2017

Cereal Research Communications

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Downy mildew, caused by Peronosclerospora sorghi is one of the important diseases affecting maize (Zea mays L.) production worldwide. Several downy mildew resistant maize lines have been identified. However, variability in the degree of resistance among maize genotypes to P. sorghi has been reported. In the present study the molecular basis of resistance of maize to P. sorghi was studied by using differential-display reverse transcription PCR (DDRT-PCR) technique. Maize seedlings of downy mildew resistant (MAI 756) and susceptible (CM 500) cultivars at two-leaf stage were inoculated with P. sorghi and leaf samples were collected at 0, 3 and 5 days after inoculation and analyzed for differentially expressed cDNAs using cDNA-RAPD approach. A total of 17 cDNA fragments corresponding to transcripts that showed alterations during the defence response of maize to P. sorghi were identified. Genes involved in signal transduction and several genes with unknown functions were found to be upregulated in maize after infection by P. sorghi. Among 35 random primers tested, OPD-05 has identified a differentially expressed cDNA coding for serine/threonine kinase protein in resistant maize genotype. Constitutive and high level expression of serine/threonine kinase gene was observed in the uninoculated plants of resistant genotype, whereas no expression of this gene was observed in uninoculated plants of susceptible genotype. However, the transcript level was induced 3 days after inoculation in the susceptible genotype and slightly reduced 5 days after inoculation. This study represents the first identification of maize serine/threonine kinase gene that is upregulated following infection by P. sorghi.

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Identification and validation of QTLs conferring resistance to sorghum downy mildew (Peronosclerospora sorghi) and Rajasthan downy mildew (P. heteropogoni) in maize

et al. 2005

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We have mapped the quantitative trait loci (QTLs) conferring resistance to sorghum downy mildew (Peronosclerospora sorghi; SDM) and Rajasthan downy mildew (P. heteropogoni; RDM), two species of DM prevalent throughout India. QTL mapping was carried out on a backcross population of 151 individuals derived from a cross between CM139 (susceptible parent) and NAI116 (highly resistant to both SDM and RDM). Heritability estimates were 0.74 for SDM and 0.67 for RDM. Composite interval mapping combined with a linkage map constructed with 80 simple sequence repeat (SSR) markers resulted in the identification of three QTLs (one each on chromosomes 2, 3 and 6) for SDM resistance and two QTLs (one each on chromosomes 3 and 6) for RDM resistance, all of which were contributed by NAI116. The significance of the major QTL on chromosome 6 (bin 6.05) that confers resistance to diverse DMs in tropical Asia, including SDM and RDM in India, was also verified. The results confirmed that some common QTLs contribute to both SDM and RDM resistance, while additional loci might specifically govern resistance to SDM. The QTL information generated in this study provide information that will aid in undertaking an integrated breeding strategy for the transfer of resistance to SDM and RDM in maize lines using marker-assisted selection.

show abstract

Genetic variability for resistance to sorghum downy mildew (Peronosclerospora sorghi) and Rajasthan downy mildew (P. heteropogoni) in the tropical/sub-tropical Asian maize germplasm

Cited by 13 publications

References 10 publications

Sorghum Downy Mildew of Maize – A Review

Sorghum Downy Mildew of Maize – A Review

Analysis of defense genes expression in maize upon infection with Peronosclerospora sorghi

Identification and validation of QTLs conferring resistance to sorghum downy mildew (Peronosclerospora sorghi) and Rajasthan downy mildew (P. heteropogoni) in maize

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