Some Conspicuous Traits in Domesticated Rice Oryza Sativa, Due To Recessive Alleles
Journal Title: Journal of Plant Science and Research - Year 2016, Vol 3, Issue 1
Abstract
Evolutionarily organisms are bestowed with salient morphological features which are considered to be an outcome of activity of functional gene products. However, there are several important features present in organisms owing to recessive alleles in specific gene loci. Interestingly, prevalence of such features due to recessive alleles of gene(s) raises intriguing questions in regard to evolution of the functional alleles in organisms! To have some understanding of this unique phenomenon, we examined four frequently confronted recessive traits in rice plant (Oryza sativa) such as (i) fragrance (ii) semi-dwarf height (iii) resistance to pathogens and (iv) non-seed shattering feature and discussed in brief the genetics, biochemistry and evolutionary significance of these traits in rice. These important traits in rice are due to mutations in genes such as BADH2, sd1, Xa13 and seed-shattering loci respectively, that otherwise encode essential functional attributes in plant systems. Genes with paralogs possibly attribute to recessive traits through their differential expression patterns. New facts are evolving on role of epigenetic mutations conferring heritable changes in gene expression that are not due to changes in the underlying gene sequence.
Authors and Affiliations
Anjan Barman
Keywords
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