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Identifying markers associated with yield traits in Nagina22 rice mutants grown in low phosphorus field or in alternate wet/dry conditions

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Title Identifying markers associated with yield traits in Nagina22 rice mutants grown in low phosphorus field or in alternate wet/dry conditions
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Creator Poli Yugandhar, Ramana Kumari Basava, Subramanyam Desiraju, Sitapati Rao Voleti, R.P. Sharma, Sarla Neelamraju
 
Subject AWD; low P; mutants; Pup1 marker; tiller number.
 
Description Not Available
Mutants are powerful genetic resources in plant breeding and functional genomics studies. Sixty seven stable ethyl methane sulphonate (EMS) induced rice mutants and the wild type parent Nagina 22 (N22) were characterized for plant height, tiller number, panicle number and grain yield under normal, low P field and alternate wet and dry (AWD) conditions in the same season. They were also genotyped with 44 SSR markers and four Pup1 (Phosphorus uptake1) gene specific markers. Genetic diversity was analysed by combining phenotype and marker data using Ward- MLM method. Single marker analysis showed significant association of four markers RM19696, RM263, RM3688 and RM1942 with grain yield in all three conditions. K-1, a Pup1 gene specific marker was significantly associated with tiller number only under low P conditions. The average dissimilarity between mutants was 0.86 and cophenetic correlation coefficient was 0.74. Six mutants were selected as gain-of-function mutants as they showed significantly higher grain yield in all three conditions, compared with N22. The selected mutants are an important resource for gene discovery for enhanced tolerance to low P and water stress conditions and associated markers can be useful in marker assisted selection.
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Date 2018-12-13T06:32:23Z
2018-12-13T06:32:23Z
2017-11-05
 
Type Journal
 
Identifier Not Available
835-2707
http://krishi.icar.gov.in/jspui/handle/123456789/15901
 
Language English
 
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Publisher Not Available