Genetic Diversity Studies or Cured Leaf Yield and its Components in Rustica Tobacco [Nicotiana rustica (L.)]
2015
Parajuli, Suman | Patel, D. A. | Makwana, M. G. | Parmar, D. J.
Study on genetic diversity was carried out with 40 genotypes of rustica tobacco (Nicotiana rustica L.) using Mahalanobis D² statistics at Bidi Tobacco Research Station, Anand Agricultural University, Anand (Gujarat) during rabi, 2012–2013. The 40 genotypes were grouped into 16 clusters based on D² analysis. The cluster II and V had maximum and clusters VIII, X, XI, XIII, XIV, XV and XVI had the minimum number of genotypes. The highest inter cluster distance (D² =1979.3) was observed between cluster XII and XV and the lowest (D² =133.37) between clusters III and VII. Cluster XII (D² =173.45) had exhibited highest intra cluster distance and the lowest was observed in cluster XIII, X, XI, XIII, XIV, XV and XVI (D² =0). The character nicotine content (17.46%), days to flowering (14.73%), reducing sugar content (11.43%), cured leaf yield (10.90%) and plant height (10.88%) contributed much to the total genetic divergence. On the basis of cluster mean, cluster XIII was superior for cured leaf yield (144.76 g) and nicotine content (4.50%). The maximum number of leaves per plant (16.66) was observed in cluster XIV, while cluster IX sowed superiority for plant height (72.25 cm). The cluster XVI and VII showed highest quality for leaf length (44.46 cm) and leaf breadth (38.53 cm), respectively. The cluster XV had desirable rating in respect to days to flowering (29.33) and days to maturity (105.00). The cluster VIII was best for leaf thickness, while cluster IV and X were found outstanding for chloride content (2.49%) and reducing sugar content (3.76%), respectively. Thus, the genotypes involved in these clusters may be taken into consideration for better parents for generating variability for the respective character and their rational improvement.
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