Screening of indigenous Chak-hao rice (Oryza sativa L.) Genotypes of Manipur for Resistance Reactions against Yellow Stem Borer (YSB), Scirpophaga incertulas (Walker)

Author: Punam Bagang*, Ganesh Mohan Balaga and K.M. Singh

Download PDF

Abstract

Rice genotypes indigenous to Manipur were screened for resistance reactions against yellow stem borer at the research field of College of Agriculture, Central Agricultural University, Imphal, Manipur. The study was carried out keeping in mind the ever growing popularity and lack of research in the field of insect infestation in Chak-hao rice genotypes and to know its bio-chemical properties related to insect infestation. The experimental design followed was Randomized Bock Design, with three replications and 19 genotypes (treatments). Insect infestation was recorded at 30, 45, 60, 75 and 90 DAT. Analysis of variance was performed after appropriate transformation of mean values obtained from the various experiments. Considering the average of six observations i.e. at 30, 45, 60, 75 and 90 DAT, the lowest per cent dead heart was observed in Kota Chak-hao with 3.58 per cent. Wairi Chak-hao showed highest per cent dead heart with 5.37 per cent. For finding the resistance reactions, biochem

Keywords

Screening, Yellow stem borer (YSB), Randomized Block Design (RBD), Biochemical Analysis

Conclusion

In conclusion, we screened the infestation percent of rice yellow stem borer and analysed the basis of resistance and susceptibility in the comparatively selected susceptible and resistant chak-hao rice genotypes of Manipur. The present study documented that the rice stem borer infestation and total sugars were found to be highest in chak-hao Poireiton demonstrating that sugar content may be one of the factors for making the plants vulnerable to insect pest infestation while rice stem borer infestation and phenolic content were exhibited to be highest in Kothachak-hao. The supplementation of chak-hao rice in the diet has positive impacts on human health. In addition, it can be concluded that chak-hao has a defensive mechanism which can protect it against some of the diseases and pests as a result of the high anthocyanin and phenolic content. The anthocyanin pigment benefit the human health and are involved in the defensive mechanisms of plants. The current research on the importance of

References

INTRODUCTION Rice genotypes known as chak-hao belong to the Oryza sativa L. species, and contain a high level of nutrients. They are mainly grown in Asia. In Manipur, a diverse array of these rice genotypes are available having a purplish grain colour mostly. The unique purple colour of chak-hao is due to high deposition of anthocyanins in the outer pericarp, seed coat and aleurone layer (Chaudhury, 2003). Chak-hao can be translated as delicious rice (Chak-rice; hao-delicious) (Roy et al., 2014). They are sold in the local markets at a premium rate. Chak-hao cultivars can grow well on stressful condition such as poor soil nutrient and water, drought and stress condition. However, are poor yielding as compared to hybrid varieties and traditional varieties (Borah et al., 2018). In recognition of its unique properties, the scope for its commercial cultivation and value addition for a profitable agro-business has been envisioned. Only 20 species are important and occur regularly in tropi

How to cite this article

Punam Bagang, Ganesh Mohan Balaga and K.M. Singh (2022). Screening of indigenous Chak-hao rice (Oryza sativa L.) Genotypes of Manipur for Resistance Reactions Against Yellow Stem Borer (YSB), Scirpophaga incertulas (Walker). Biological Forum – An Intern