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Basvaraj C. Viraktamath Arremsetty S. Hariprasad Gouri S. Laha Mohammed I. Ahmed Podishetty Natarajkumar Mugalodi S. Ramesha Chirravuri N. Neeraja Sena M. Balachandran Nallathigal S. Rani Pippalla Balaji Suresh Kalidindi Sujatha Manish Pandey Gajjala Ashok Reddy Maganti S. Madhav Raman M. Sundaram 《Plant Breeding》2011,130(6):608-616
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Passoupathy Rajendrakumar Akshaya Kumar Biswal Kannabiran Sakthivel Maganti Sheshu Madhav Chirravuri Neeraja Sena M. Balachandran Kommoju Srinivasarao Podishetty Natarajkumar Yadla Hari Kalidindi Sujatha Raman M. Sundaram 《Euphytica》2009,169(2):263-271
SSR markers targeting (GATA)
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motifs are known to be highly polymorphic and useful in many organisms. (GATA)
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motif specific SSR markers covering the whole rice genome are not available. The present study was carried out with an objective
to identify class I rice microsatellites in the rice genome with (GATA)n motifs, in-silico, and validate their potential as molecular markers. A total of 243 such motifs were identified; 65 of these
were present in the genic region, 59 were in the upstream region and the remaining motifs were found in the intergenic regions.
Many of the (GATA)
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motifs were found within and/or upstream of genes associated with biotic or abiotic stress tolerance. A total of 230 PCR-based
markers targeting all the class I (GATA)
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microsatellites were developed and 35 of these markers spread across the rice genome were validated in a set of 24 representative
rice varieties belonging to five distinct cultivar groups. All the markers were polymorphic, with average polymorphism information
content (PIC) value of 0.61, and the rice cultivars could be uniquely distinguished into different cultivar groups based on
marker analysis. These informative markers targeting (GATA)
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motifs representing a new set of markers in rice will be highly useful for genetic studies and marker-assisted selection.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.
Passoupathy Rajendrakumar, Akshaya Kumar Biswal and Kannabiran Sakthivel contributed equally. 相似文献
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Kommoju Srinivasarao Basavaraj C. Viraktamath Arremsetty S. Hari Prasad Gouri S. Laha Mohammed I. Ahmed Podishetty Natarajkumar Kalidindi Sujatha Madamshetty Srinivas Prasad Manish Pandey Mugalodi S. Ramesha Chirravuri N. Neeraja Sena M. Balachandran Nallathigal S. Rani Balachandra Kemparaju Kolluru Madhan Mohan Venkata S. A. K. Sama Hajira Shaik Chintavaram Balachiranjeevi Karnati Pranathi Gajjala Ashok Reddy Maganti S. Madhav Raman M. Sundaram 《Plant Breeding》2013,132(6):586-594
IR 58025A is a very popular wild‐abortive cytoplasmic male sterile (WA‐CMS) line of rice and is extensively used for hybrid rice breeding. However, IR 58025A and many hybrids derived from it possess mild aroma (undesirable in some parts of India) and are highly susceptible to bacterial blight (BB) and blast diseases. To improve IR 58025A for BB and blast resistance, we have introgressed a major dominant gene conferring resistance against BB (i.e. Xa21) and blast (i.e. Pi54) into IR 58025B, the maintainer line of IR 58025A. An introgression line of Samba Mahsuri (i.e. SM2154) possessing Xa21 and Pi54 genes in homozygous condition and fine‐grain type was used as donor parent, and backcross breeding strategy was adopted for targeted introgression of the resistance genes. PCR‐based molecular markers tightly linked to Xa21 and Pi54 were used for selection of BB‐ and blast‐resistant lines, while closely linked markers were used for identification of backcross‐derived plants devoid of Rf4 and aroma. At BC2F5, four backcross‐derived lines possessing resistance against BB and blast, devoid of aroma, high yield, short plant stature, long‐slender grain type and with recurrent parent genome recovery ranging from 88.8% to 98.6% were selected and advanced for further evaluation. The improved versions of IR 58025B, viz. SB54‐11‐143‐9‐44‐5, SB54‐11‐143‐9‐44‐98, SB54‐11‐143‐9‐44‐111 and SB54‐11‐143‐9‐44‐171, behaved as perfect maintainers when test‐crossed with WA‐CMS lines. Agronomically superior lines of improved IR 58025B are being converted to CMS line through backcrossing for developing high‐yielding and biotic stress‐resistant rice hybrids. 相似文献
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I. Jaikishan P. Rajendrakumar M. S. Ramesha B. C. Viraktamath S. M. Balachandran C. N. Neeraja K. Sujatha K. Srinivasa Rao P. Natarajkumar Y. Hari K. Sakthivel A. S. Ramaprasad R. M. Sundaram 《Plant Breeding》2010,129(1):108-111
This study was undertaken to assess the comparative potential of 25 Expressed Sequence Tag derived simple sequence repeats (EST-SSRs) and 25 genomic SSRs in the prediction of grain yield heterosis using a set of nine cytoplasmic male sterile (CMS) lines and 32 restorer lines of rice. EST-SSRs and genomic SSRs exhibited an average Polymorphism Information Content value of 0.37 and 0.45, respectively. The coefficient of marker polymorphism among parental lines with respect to a set of hypervariable EST and genomic SSRs was correlated with standard heterosis for grain yield of six public bred rice hybrids. EST-SSRs gave a better correlation (r = 0.75) as compared with genomic SSRs (r = 0.09). When 10 'key' informative EST-SSR markers which showed a higher positive correlation with grain yield heterosis were validated in a new set of 14 experimental hybrids, the markers exhibited a higher correlation (r = 0.79), indicating the predictive value of these EST-SSRs. We recommend these 10 'key' informative EST-SSR markers for analysis of genetic diversity of parental lines and prediction of heterosis in hybrid rice breeding programmes. 相似文献
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