Heterosis studies for root and productivity traits in rabi sorghum [Sorghum bicolor (L.) Moench.]
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Abstract
Heterosis in sorghum for yield and its components has been studied fairly extensively but the root system has not received adequate attention. The root traits such as maximum root length, root dry weight, root number etc., were found to play an important role to overcome moisture stress [1]. In the present study, heterosis for root traits in relation with the productivity traits has been thoroughly analyzed. A total of twelve hybrids were developed using four distinct varieties viz., M 35-1 (Most popular rabi sorghum variety), CSV 8R (Improved variety released at National level), DSV 4 and DSV 5 (Charcoal rot resistant high yielding varieties released for Karnataka state). The seeds of 12 hybrids along with five parents were sown in polythene bags during the year 2002 rabi. The bags of size 60cm length x 30cm diameter were placed in pits of 60cm depth in a deep black soil The experiment was laid out in a randomized block design with three replications. Each entry was represented by 5m length with a 15 plants / row with a spacing of 60 x 30cm. Observations on five randomly selected plants for days to 50% flowering, grain yield per plant, 500 seed weight, root number per plant, root length and root dry weight were recorded. For taking observations on root traits, polythene bags were removed from the soil and with the help of blade, ploythene sheet was cut and slowly removed. Later, water was sprayed to remove the soil and wash the roots. After washing the roots, the observations were taken. Heterosis was estimated over mid parent and better parent by following standard procedures.
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How to Cite
Patil, P. R., & Biradar, B. D. (2005). Heterosis studies for root and productivity traits in rabi sorghum [Sorghum bicolor (L.) Moench.]. INDIAN JOURNAL OF GENETICS AND PLANT BREEDING, 65(03), 213–214. https://doi.org/.
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Research Article
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