GENETIC ANALYSIS OF YIELD AND YIELD COMPONENTS IN RABI SORGHUM (Sorghum bicolor (L.) Moench)
KrishiKosh
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Title |
GENETIC ANALYSIS OF YIELD AND YIELD COMPONENTS IN RABI SORGHUM (Sorghum bicolor (L.) Moench)
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Creator |
KADAM, PRALHAD S.
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Contributor |
VASHI, P.S.
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Subject |
hybrids, grain, yields, crossing over, heterosis, biological phenomena, sorghum, planting, diseases, developmental stages
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Description |
In the present investigation information on the magnitude of heterosis, combining ability and gene action were obtained for grain yield and its components following line x tester analysis involving three CMS lines and twelve testers of rabi sorghum. The experimental material consisting of fifteen parents, their thirty six F1s and a standard check were tested in randomized block design with three replications at Achhalia and Tanchha centers of Navsari Agricultural University during rabi 2006 under residual soil moisture condition. Observations on ten characters were recorded at each location. The analysis of variance for all the characters revealed presence of considerable variability in the material under study. Large variances due to locations for panicle weight and grain yield per plant indicated appreciable influence of environment on the expression of these traits. Highly significant differences among male and female lines were observed for all the traits. Both parents and hybrids interacted significantly with locations. Among the parents, females x locations interaction were considerably smaller for majority of the characters than males x locations interaction indicating stability of female parents. Hybrids were found more sensitive to change in environment. None of the parents as well as hybrids showed consistent performance for all the characters. Among parents, MS 116A, PVR 453, SPV 1411 and CSV 14R while among hybrids, MS 116A x PVR 453, PMS 7A x SPV 1411, MS 116A x SPV 1595 and PMS 7A x CSV 14R exhibited high mean performance for grain yield and some of its components. Number of primaries per panicle was found to be the most heterotic component followed by grain yield per plant, panicle weight and number of grains per panicle. The crosses MS 116A x PVR 453, PMS 7A x SPV 1411, MS 116A x SPV 1595 and PMS 7A x CSV 14R recorded higher heterosis for grain yield and some of its attributes over the standard check. The higher heterosis of crosses was closely related with their per se performance. Most of the high heterotic crosses involved at least one parent with high gca effects. Combining ability studies indicated that non-additive gene action was predominant in the inheritance of grain yield and yield components. Specific combining ability variance was found susceptible to the environment for most of the characters. Parental lines MS 116A, SPV 1411, PVR 453, SPV 1595, CSV 14R and CSV 216R were found good general combiners for grain yield per plant, panicle weight, number of primaries per panicle, panicle length and number of grains per panicle. The per se performance of parents for various traits in general was associated with high gca effects indicating per se performance could be good indicator of good general combining ability. The estimates of sca effects revealed that none of the cross was superior for all the characters. The crosses MS 116A x PVR 453, PMS 7A x SPV 1411, MS 116A x R 40911 and PMS 7A x CSV 14R exhibited highly significant sca effects along with high per se performance and standard heterosis for grain yield per plant and some of its components. All these crosses involved at least one parent as good general combiner. On the basis of results of heterosis, gene action and combining ability, appropriate breeding methods viz., heterosis breeding, reciprocal recurrent selection and biparental mating for enhancement of traits associated with grain yield has been suggested. |
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Date |
2016-03-08T12:05:04Z
2016-03-08T12:05:04Z 2007-06 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/64924
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Language |
en
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Format |
application/pdf
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Publisher |
Navsari Agricultural University, Navsari
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