Indian Society of Genetics & Plant Breeding
The rate of improvement in leaf yields of TSS tobacco
(Nicotlana tabbacum L.) varieties grown in India since
1947 and basis of yield improvements was studied. The
estimated rate of gain in yield from 1953-98 is 178, 26,
20 and 24 kg/ha in green, cured and bright leaf and grade
index, respectively. The rate of genetic gain from Chatham
(1950) to VT1158 (1993) is 67, 12, 5 and 9 kglha in green,
cured and bright leaf yields and grade index, respectively.
The rate of gain due to production technology is 111, 14,
15 and 15 kg/ha in green, cured and bright leaf and grade
index, respectively. Higher yields could be achieved mainly
through development of light to medium cast varieties
with late flowering and improvement in various
morphological characters. Improvement in leaf number,
leaf area and specific leaf weight and fine-tuning of leaf
cast nature and flowering are essential for future yield
gains.
Keywords: Tobacco, yield improvement, genetic gain
Year: 2005
Volume: 65
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
K. Sarala, K. Nagarajan, N. S. Murthy, M. Anuradha, K. Siva Raju, H. Ravisankar, A. I. Narayanan and G. S. B. Prasannasimha Rao info_circle
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