Genetic Diversity Analysis For Physiological Traits in RADISH (Raphanus sativus L)

Abstract

A field experiment was conducted at the Agricultural Farm of Sher-e-Bangla Agricultural University, Sher-e-l3angla Nagar, Dhaka, Bangladesh during the rabi season of November 2011 to February 2012 to characterize and genetic diversity analysis of 21 radish varieties based on some physiological characters. Four distinct clusters were observed among the radish varieties on the basis of total dry matter (TDM), relative growth rate (RGR). crop growth rate (CGR). leaf area index (LAI), net assimilation rate (NAR), leaf area ratio ([AR). leaf weight ratio (LWR), leaf number per plant, harvest index (HI), days to harvest and root yield per plant. Cluster IV consisted of the highest number of varieties, viz.. Mino Early Long White (Ufsi Mula), BARI Radish-S (Druti), Mino Long White, Early White-35, Chaniak, Nong Woo Bio (F1 hybrid), Radish Royal- 40, White Prince (F1 hybrid radish). Cluster II composed of Lucky (Early 35 Days), Paira-40, Bright White 40, Rupsa, Tasakisan (China). Rocky-45. Cluster III composed of Snow White (IF1 hybrid). BARI Radish-2 (Pinky), BARI Radish4. Barisal Local, Ramboo-40. BARI Radish-I (Tasakisan) and Ivory White formed cluster 1. The highest root yield was observed in cluster 1(380.06) which also produced the highest 1DM and [Al. The longest cluster distance was observed between cluster I and cluster II. Clustering pattern was not influenced by the genotypic origin. Ivory white produced the highest root yield, TDM, and LA! which was followed by BARI radish-I. Ivory white did not flower in growing season. BARI radish-2 produced the highest ROR and NAR. Rupsa produced the highest harvest index. Leaf area index, LAR, LWR and leaf number per plant were the major components of genetic divergence in the radish varieties. Considering genetic diversity and other performances. BARI radish-I, BARI radish-2 and Rupsa appear to be promising parents for future hybridization program.