Screening Bold Grained Rice (Oryza Sativa L.) Genotypes Based on the Ranking of Their Performance for Biochemical Traits

R. Chakraborty¹, S. Chakraborty²*, B. K. Dutta² and S. B. Paul³

¹Department of Biotechnology, Assam University, Silchar - 788 011 India.

²Department of Ecology & Environmental science, Assam University, Silchar - 788 011 India.

³Department of Chemistry, Assam University, Silchar - 788 011 India.

Corresponding Author E-mail: ausupriyoch_2008@rediffmail.com

ABSTRACT: In Barak Valley Zone of Assam the physically hard working people prefer bold grained rice with good taste because of slow digestion and longer retention in the stomach. But most of the modern high yielding rice varieties is medium and fine grained. Keeping the need of rural people in mind, the present experiment was conducted on 47 bold grained rice genotypes with two recommended high yielding check varieties namely Ranjit and Monohar Sali of Barak Valley, Assam. The mean performance of eight biochemical traits of these 49 genotypes was evaluated. Crude protein content (%) and total soluble protein content (g/100g of oven dry sample) varied from 7.09 to 13.10 and 4.10 to 6.69 respectively. The starch content (g/100g of oven dry sample), amylose content (% of starch) and amylopectin content (% of starch) varied from 79.78 to 65.63, 25.56 to 15.25 and 84.75 to 74.44 respectively. Total soluble sugar content, total reducing sugar content and total non-reducing sugar content (g/100g of oven dry sample) ranged from 1.14 to 0.35, 0.363 to 0.103 and 0.935 to 0.279 respectively in the bold grained rice genotypes. Rank correlation study revealed that total soluble protein content had highly significant positive correlation with crude protein content, starch content, amylose content, amylopectin content, total soluble sugar content, total reducing sugar content and total non-reducing sugar content. Nine bold grained rice genotypes were selected out of 47 bold grained rice genotypes on the basis of lower total cumulative rank obtained from the performance of eight biochemical traits. The selected genotypes were Chandmoni (G20), Bar Madhava (G28), Matonga (G11), Soularpona (G7), Mala (G38), Soulpona (G1), Lati Sali (G2), Dudh Mula (G24) and Hathi Sali (G42). These genotypes hold potential for use as parents in future hybridization program for transferring the desirable gene (s) for biochemical traits into other varieties.

KEYWORDS: Biochemical traits; mean performance; rank correlation; bold grained rice

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