Screening of Rice (Oryza sativa L.) Genotypes for Sheath Blight (Rhizoctonia solani) in changing Climate Scenario

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
SUBHASH CHANDRA ◽  
Pankaj Kumar ◽  
Neelam Yadav
Keyword(s):  
Oryza Sativa ◽  
Rhizoctonia Solani ◽  
Oryza Sativa L ◽  
Climate Scenario ◽  
Sheath Blight ◽  
Changing Climate ◽  
Resistant Reaction ◽  
Moderately Resistant

Out of 108 germplasm, screened under natural as well as under artificial inoculated condition, none of the entries were found immune or resistant. However, forty five entries viz., Ramkajra, Baigani black, Beni, Prasada, Narendra-118, Narendra-97, Aswani, madhuri, Sawani, IET-14807, Pant Dhan-11, Gajgour, IET-16711, Karahni, Dalkachari, Bagri, Rambli-AS, Motiforam, Ram bhog, Kaland, Aktahwa -R, Lalkawa, Tulsi, IR-36, Suggapankhi, IET-16706, basti cul-9, Aktahwa- FIO, CR-1446, Sonachoor, Aktahwa, Bansfool, Saket-4, IR-24, NDR-359, NDR-637, Pant Dhan-4, NDR- 330, Gajgour, T-182, IET-16705, Pusa-33, Akasi, IR-8, Saryukushmaha were found moderately resistant, 37 moderately susceptible and fourteen were observed susceptible. Rest of the entries showed highly susceptible reaction. Under artificial inoculated condition, out of 82 entries, none of the entry was found resistant. Only two entries viz., Baigani black and Prasada showed moderately resistant reaction, seventeen moderately susceptible and twenty seven entries susceptible. Rest of the entries was found highly susceptible.

scholarly journals Genetic diversity analysis in indigenous rice (Oryza sativa L.) germplasm for Bacterial Leaf Blight (Xanthomonas oryzae pv. Oryzae) using resistance genes linked markers

2021 ◽  
Author(s):  
Khannetah K. R . ◽  
Ramchander S. ◽  
Andrew Peter Leon M. T ◽  
Shobha D. ◽  
Saravanan S. ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Resistance Genes ◽  
Bacterial Blight ◽  
Rice Yield ◽  
Oryza Sativa L ◽  
Molecular Data ◽  
Lesion Length ◽  
R Genes ◽  
Leaf Clipping ◽  
Moderately Resistant

Abstract Among rice ( Oryza sativa L.) diseases, bacterial blight (BB), caused by Xanthomonas oryza pv. Oryzae , plays a pivotal role in decreasing rice yield. BB is reported to be the most serious constraint to improving rice yield. The present investigation assessed the potentiality of bacterial blight resistance and molecular characterization of 100 rice accessions for four major BB resistance genes, viz., Xa4, xa5, xa13 and Xa21 . Disease screening was carried out under glasshouse conditions using a BB culture isolated from BB-infected rice fields through the leaf clipping method. Analyses of 13 BB resistance genes linked with polymorphic microsatellites markers indicated the presence of single-, two-, three- and four-gene combinations of xa5, xa13, Xa4 and Xa21 . We found four accessions to be resistant; 34 accessions to be moderately resistant; 49 accessions to be moderately susceptible and 13 accessions to be susceptible. Among the resistant lines, IR12L110, Namcheonbyeo, Dhalaheera and SahbhagiDhan recorded a minimum lesion length of 3.7cm, 4.2cm, 4.67cm and 8.3 cm, respectively. Phylogenetic tree, constructed using molecular data, grouped the rice germplasm into four major clusters. R genes xa 5 and Xa4 contributed 14 positive compatible R genes, each belonging to 28 germplasm for BB resistance. The potential genetic resources identified as resistant to BB can be used as donors for the improvement of rice BB resistance in rice breeding programs.

scholarly journals Comparison of gene co-networks reveals the molecular mechanisms of the rice (Oryza sativa L.) response to Rhizoctonia solani AG1 IA infection

2018 ◽  
Vol 18 (5) ◽  
pp. 545-557 ◽  
Author(s):  
Jinfeng Zhang ◽  
Wenjuan Zhao ◽  
Rong Fu ◽  
Chenglin Fu ◽  
Lingxia Wang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Rhizoctonia Solani ◽  
Molecular Mechanisms ◽  
Oryza Sativa L

scholarly journals PENGARUH FUNGISIDA BERBAHAN AKTIF ASAM KLORO BROMO ISOSIANURIK TERHADAP INTENSITAS PENYAKIT BLAS, HAWAR PELEPAH DAUN DAN BERCAK DAUN CERCOSPORA PADA TANAMAN PADI DI GADINGREJO, PRINGSEWU

2014 ◽  
Vol 2 (2) ◽  
Author(s):  
Pendi Setiawan ◽  
Titik Nur Aeny ◽  
Efri Efri
Keyword(s):  
Oryza Sativa ◽  
Rhizoctonia Solani ◽  
Oryza Sativa L ◽  
Pyricularia Oryzae

Padi (Oryza sativa L.) merupakan tanaman penghasil beras yang menjadi makanan pokok bagi hampir seluruh penduduk di Indonesia. Salah satu kendala dalam budidaya padi adalah karena serangan berbagai macam cendawan, diantaranya cendawan Pyricularia oryzae Cav. (penyebab penyakit blas), cendawan Rhizoctonia solani Khun. (penyebab penyakit hawar pelepah daun) dan cendawan Cercospora oryzae Miyake. (penyebab penyakit bercak daun cercospora). Salah satu pengendalian yang dapat dilakukan adalah penggunaan fungisida sintetik. Penelitian ini dilakukan untuk mengetahui pengaruh fungisida berbahan aktif asam kloro bromo isosianurik terhadap intensitas penyakit blas, hawar pelepah daun dan bercak daun cercospora pada tanaman padi. Penelitian ini dilaksanakan di Desa Wonodadi, Kecamatan Gadingrejo, Kabupaten Pringsewu, Lampung, pada bulan Desember 2012 sampai dengan Juni 2013. Perlakuan dalam percobaan ini disusun dalam rancangan acak kelompok (RAK) dengan empat perlakuan dan empat kelompok. Data yang diperoleh dianalisis menggunakan sidik ragam dan nilai tengah masing-masing perlakuan diuji dengan uji BNT pada taraf 5%. Hasil penelitian menunjukkan bahwa aplikasi fungisida berbahan aktif asam kloro bromo isosianurik efektif menekan intensitas penyakit blas leher dan penyakit hawar pelepah daun, tetapi  tidak efektif dalam menekan intensitas penyakit blas daun dan penyakit bercak daun cercospora pada tanaman padi varietas Ciherang di Lampung. Tingkat konsentrasi fungisida yang efektif dalam menekan intensitas penyakit blas leher adalah 0,5; 1,0; dan 1,5 g L-1, sedangkan tingkat konsentrasi fungisida yang efektif menekan intensitas penyakit hawar pelepah daun adalah 1,0 g L-1 dan 1,5 g L-1. Tidak ada perbedaan yang nyata antar tingkat konsentasi terhadap intensitas penyakitpenyakit tersebut.

Role of silicon in elevating resistance against sheath blight and blast diseases in rice (Oryza sativa L.)

2021 ◽  
Author(s):  
Atul Prakash Sathe ◽  
Amit Kumar ◽  
Rushil Mandlik ◽  
Gaurav Raturi ◽  
Himanshu Yadav ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Sheath Blight

scholarly journals Identification of QTLs and possible candidate genes conferring sheath blight resistance in rice (Oryza sativa L.)

SpringerPlus ◽  
2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Shailesh Yadav ◽  
Ghanta Anuradha ◽  
Ravi Ranjan Kumar ◽  
Lakshminaryana Reddy Vemireddy ◽  
Ravuru Sudhakar ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Candidate Genes ◽  
Oryza Sativa L ◽  
Sheath Blight ◽  
Blight Resistance ◽  
Sheath Blight Resistance
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