Genetics of Forage Attributes in Sorghum [Sorghum bicolor (L.) Moench]
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Date
2006
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MPUAT, Udaipur
Abstract
In the present investigation entitled “Study of Genetics of Forage Attributes in Sorghum [Sorghum bicolor (L.) Moench]”, an attempt was made with eight parents and their thirty-eight crosses (Diallel mating design without reciprocals). The experimental material was planted in Randomized Block Design in three replications in four environments (early sown, late sown, low plant density and high plant density population), in kharif 2004 at Instructional Farm of Rajasthan College of Agriculture, Udaipur (Rajasthan). Observations were recorded on 10 quantitative and qualitative traits viz. Days to flower, Days to maturity, Plant height (cm), Stem girth (cm), Number of leaves per plant, Grain yield per row (g), Green fodder yield per row (kg), Dry fodder yield per row (kg), Protein content (%) and Crude fibre content (%).The data were subjected to statistical analysis to estimate heterosis and combining ability. Since, Bartlett test was significant for all the traits, so stability parameters were not estimated.
The analysis of variance for experimental design revealed the presence of significant amount of variability for all the traits. On the basis of per se performance, E2 was most suitable for dry fodder yield per row followed by E4, E1 and E3. E2 was also found favourable for traits like green fodder yield per row and protein content. The magnitude of heterosis and heterobeltiosis was good for all the traits except days to flower, days to maturity and stem girth. Significant economic heterosis over CSV-15 was recorded in 12, 9, 5 and 11 crosses in E1, E2, E3 and E4, respectively. 2 crosses, P1 x P3 and P1 x P7 revealed economic heterosis in all the environments. Combining ability analysis indicated that most of the traits under study were controlled by additive as well as non-additive gene actions. An overall appraisal of GCA effects revealed that parents P1, P2 and P8 (MP-1, SU-1 and Raj-2) were good general combiners for dry fodder yield per row. These parents were also good combiners for one or other component traits in one or more environments.
Two crosses, P1 x P3 and P1 x P7 (MP-1 x GJ-39 and MP-1 x CSV-15) exhibited both economic heterosis and SCA effects in all the environments for dry fodder yield and other component traits. Across the environments, three crosses viz. P1 x P8 (MP-1 x Raj-2), P2 x P4 (SU-1 x S-300), P3 x P8 (GJ-39 x Raj-2)in early sown environments; one cross, P3 x P4 (GJ-39 x S-300) in low plant density population were having economic heterosis and SCA effects. Besides, P2 x P3 (SU-1 x GJ-39) and P6 x P8 (SPV-1472 x Raj-2) are identified for late sown environments and high population density population environments as both of them showed economic heterosis and possessed H x L combination.
Description
Genetics of Forage Attributes in Sorghum [Sorghum bicolor (L.) Moench]
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Citation
Lakshyadeep and Chaudhary, 2006