Publications by authors named "Raju Ram Choudhary"

2 Publications

  • Page 1 of 1

Identification of Novel Marker-Trait Associations for Lint Yield Contributing Traits in Upland Cotton ( L.) Using SSRs.

Front Plant Sci 2021 26;12:653270. Epub 2021 May 26.

Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar, India.

Improving the yield of lint is the main objective for most of the cotton crop improvement programs throughout the world as it meets the demand of fiber for textile industries. In the current study, 96 genotypes of were used to find novel simple sequence repeat marker-based associations for lint yield contributing traits by linkage disequilibrium. Extensive phenotyping of 96 genotypes for various agronomic traits was done for two consecutive years (2018 and 2019) in early, normal, and late sown environments. Out of 168 SSR markers screened over the 96 genotypes, a total of 97 polymorphic markers containing 293 alleles were used for analysis. Three different models, i.e., mixed linear model (MLM), compressed mixed linear model (CMLM), and multiple locus mixed linear model (MLMM), were used to detect the significant marker-trait associations for six different environments separately. A total of 38 significant marker-trait associations that were common to at least two environments were considered as promising associations and detailed annotation of the significant markers has been carried out. Twenty-two marker-trait associations were found to be novel in the current study. These results will be very useful for crop improvement programs using marker-assisted cotton breeding.
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May 2021

Genotype-Specific Antioxidant Responses and Assessment of Resistance Against Causing Sclerotinia Rot in Indian Mustard.

Pathogens 2020 Oct 27;9(11). Epub 2020 Oct 27.

Biochemistry Laboratory, Department of Genetics and Plant Breeding, Cotton Section, CCS Haryana Agricultural University, Hisar, Haryana 125004, India.

Productivity of Indian mustard, an important oilseed crop of India, is affected by several pathogens. Among them, the hemibiotroph , which causes sclerotinia rot disease, is the most devastating fungal pathogen causing up to 90% yield losses. The availability of host resistance is the only efficient approach to control and understand the host-pathogen interaction. Therefore, the present investigation was carried out using six Indian mustard genotypes with contrasting behavior towards sclerotinia rot to study the antioxidant resistance mechanism against . The plants at post-flowering stage were inoculated with five-day-old pure culture of using artificial stem inoculation method. Disease evaluation revealed significant genotypic differences for mean lesion length among the tested genotypes, where genotype DRMR 2035 was found highly resistant, while genotypes RH 1569 and RH 1633 were found highly susceptible. The resistant genotypes had more phenolics and higher activities of peroxidase, catalase and polyphenol oxidase which provide them more efficient and strong antioxidant systems as compared with susceptible genotypes. Studies of antioxidative mechanisms validate the results of disease responses.
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October 2020