{"title":"Emergence of micronuclei as polymorphism induced genomic instability in Fennel (Foeniculum vulgare Mill.).","authors":"G. Kumar, M. Mishra, K. Tripathi, P. Ojha","doi":"10.31742/ijgpb.82.2.16","DOIUrl":null,"url":null,"abstract":"Micronuclei (MN) are extra-nuclear bodies containing damaged chromosomal fragments as well as complete chromosomes that are not otherwise incorporated into the nucleus after cell division. The present experiment was conducted to assess mutagenic effects of ethyl methane sulphonate (EMS) on the meiotic behavior of pollen mother cells of fennel (Foeniculum vulgare Mill.). Cytological analysis revealed that micronuclei were incited at all the three concentrations of EMS. A peculiar correlation of chromosomal abnormalities, mainly bridge and laggard at anaphase I and II with this nuclear polymorphism were experienced for genomic instability. Pollen viability was additionally inspected through pollen fertility. Thus, the MN formations bring about incomplete elimination of the genome, which can be proficiently use as the light of hope inbreeding programmers to produce addition and substitution lines.","PeriodicalId":13321,"journal":{"name":"Indian Journal of Genetics and Plant Breeding","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2022-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Indian Journal of Genetics and Plant Breeding","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.31742/ijgpb.82.2.16","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Micronuclei (MN) are extra-nuclear bodies containing damaged chromosomal fragments as well as complete chromosomes that are not otherwise incorporated into the nucleus after cell division. The present experiment was conducted to assess mutagenic effects of ethyl methane sulphonate (EMS) on the meiotic behavior of pollen mother cells of fennel (Foeniculum vulgare Mill.). Cytological analysis revealed that micronuclei were incited at all the three concentrations of EMS. A peculiar correlation of chromosomal abnormalities, mainly bridge and laggard at anaphase I and II with this nuclear polymorphism were experienced for genomic instability. Pollen viability was additionally inspected through pollen fertility. Thus, the MN formations bring about incomplete elimination of the genome, which can be proficiently use as the light of hope inbreeding programmers to produce addition and substitution lines.
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Advance the cause of genetics and plant breeding and to encourage and promote study and research in these disciplines in the service of agriculture; to disseminate the knowledge of genetics and plant breeding; provide facilities for association and conference among students of genetics and plant breeding and for encouragement of close relationship between them and those in the related sciences; advocate policies in the interest of the nation in the field of genetics and plant breeding, and facilitate international cooperation in the field of genetics and plant breeding.
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