Inheritance and Allelic Relationship Study of Gene(s) Governing Aroma in Rice (Oryza sativa L.): A Review Kumar Vikas*, Rastogi N. K., Chandraker P., Sharma B. Department of Genetics and Plant Breeding, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur-492012, (Chhattisgarh), India *Email: vikas.jnau@gmail.com
Online published on 2 January, 2017. Abstract Aromatic rice varieties constitute a small but specialty group of rice because of their superior grain qualities and pleasant aroma. Aroma is considered as one of the most important quality trait of aromatic rice which commands a higher price than non-aromatic rice in national as well as international market. The biochemical basis of aroma was identified as 2-acetyl-l-pyrroline (2-AP) which is present in all parts of the plant except roots. For planning a systematic breeding programme for improvement of quality rices, an understanding of the nature of inheritance and allelic relationship study of gene(s) governing aroma is a pre-requisite. Inheritance of aroma has been reported to be controlled by one or two or three dominant or recessive genes; two, three or four complementary genes; inhibitory gene actionor polygenic control depending upon the materials used in the study. However, most of the inheritance studies on aroma indicated monogenic recessive control. There is no consensus yet on the nature of inheritance in aromatic character. The lack of agreement among many researchers appears to be related to the differences in aromatic varieties used, difficulties of the methods on evaluating aroma and the expression of aroma gene(s). Besides, allelic relationship study enables breeder to know about the gene(s) present in two different aromatic parents is same or different. Additionally, the allelic relationship study exploits the possibility of identifying new gene(s) which is valuable to the breeders. Top Keywords Rice, Aroma, Quality, Inheritance, Allelic relationship. Top |