August 2009

Litter production, decomposition and physico-chemical properties of soil in 3 developed agroforestry systems of Meghalaya, Northeast India

  The present study was conducted under 3 developed agroforestry systems that is, Khasi mandarin (Citrus reticulata), Alder (Alnus nepalensis) and Khasi pine (Pinus kesiya) in the state of Meghalaya, northeast India to study the litter dynamics and physico-chemical properties of soil. The findings of our investigation revealed that the soil texture in 3 systems varied from sandy to loamy sand and water...

Author(s): O. P. Tripathi, H. N. Pandey and R. S. Tripathi

August 2009

Genetic differentiation of Senna tora (L.) Roxb. and Senna obtusifolia (L.) Irwin & Barneby by using RAPD markers

  Genetic relationships were examined among 19 accessions belonging to twoSenna species by using RAPD markers. Within 60 tested primers, 9 primers only produced clear banding patterns that have been expected. An initial test of 60 primers, gave only 9 with consistently clear banding patterns. These 9 primers generated 108 scorable amplified products, of which 72 were polymorphic (66.6%). This degree of...

Author(s): Vivek Tripathi, Sandhya Goswami, Anil Kumar and Palpu Pushpangadan

August 2009

Improvement of mungbean varieties through induced mutations

  Mutations were induced in two mungbean varieties, K-851 and PS-16 using EMS and gamma rays as mutagens. Selection studies were conducted to improve the yield and to generate genetic variability in different quantitative traits viz., fertile branches per plant, pods per plant and seed yield per plant. Mean values in traits increase significantly over the controls and genetic parameters were recorded higher for...

Author(s): Samiullah Khan and Sonu Goyal

August 2009

Radiosensitivity test on two varieties of Terengganu and Arab used in mutation breeding of roselle (Hibiscus sabdariffa L.)

  A study was carried out in a greenhouse to determine the effective doses for mutation breeding of roselle during the year 2006/2007. Seedling height was the parameter recorded at 2, 3, 4 and 5 weeks after sowing of M1 seeds of 2 varieties Terengganu and Arab. The results indicated that increasing doses of gamma irradiation from 0 to 1200 Gy in steps of 100 Grey (Gy) caused increasing physiological effect...

Author(s):   S. S. Harding and O. Mohamad