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Advisor: Aher, Prif.R.P
Mangare, Dr.M.R
Kareppa, Dr.S.M
Sonone, Prof.A.H
Publisher: Mahatma Phule Krishi Vidyapeeth Rahuri - 413 722 Dist. Ahmednagar, Maharashtra State, India.
Language: en
Type: Thesis
Agrotags: null
Abstract: The investigation on "Combining ability studies in pearl millet {Pennisetum glaucum (L.) R. Br.)"was carried out with an aim to study the heterosis, combining ability, gene action, heritability and correlationbetween yield and yield contributing characters. The crosses were made by involving 3 lines and 15 testers during summer, 2002, and the resulting hybrids (45) along with parents (18) and two standard checks (Shradha andSaburi) were evaluated at Botany Farm, Post Graduate Institute, M.P.K. V. Rahuri, in Randomised Block Design with three replications during Kharif, 2002.The cross combination RHRB-17A x RHRBI-1176 recordedthe highest magnitude of heterosis over mid parent (281.24%) and RHRB- 17A x RHRBI-1257 recorded highest magnitude of heterobeltiosis (247.745%) for the character grain yield per earhead. Both also had goodper se performance.Likewise, the cross combinations, RHRB-14Ax RHRBI-1198 (days to 50 per cent flowering), RHRB-17A x RHRBI-1189 (days to maturity RHRB-16A x RHRBI-1279 (productive tillers per plant), RHRB -17A x RHRBI-458 (plant height), RHRB-16Ax RHRBI-1198 (flag leafarea), RHRB-17Ax RHRBI-1132 (grain yield per earhead) and RHRBH-17Ax RHRBI-1198 (1000 grain weight) exhibited highly significant andthe highest heterobeltiosis for the respective characters. The gca and sea variances were significant for most of the characters studied indicating variability in combining ability of the various lines and testers used. Among the females RHRB-16A and RHRB-17Awere the best combiners as they exhibited significant gca effects formore than five important yield contributing characters. However, amongmale parents RHRBI-1307 was the best combiner, followed by RHRBI-495, RHRBI-1189, RHRBI-1132, RHRBI-458, RHRBI-1221, RHRBI-1257 and RHRBI-1279.The combination RHRB-16Ax RHRBI-1132 followed by RHRB-17Ax RHRBI- 1156 and RHRB-17AX RHRBI-1257 exhibited significantand high sea effects for grain yield per plant. Similarly, the combinations,RHRB-16Ax RHRBI-1186 (days to 50 per cent flowering), RHRB-16Ax RHRBI-1279 (productive tillers per plant), RHRB-14A x RHRBI-1186(plant height, RHRB-14Ax RHRBI-1307 (flag leaf area), RHRB-14Ax RHRBI-1279 (grain yield per earhead ) and RHRB-14A x RHRBI-1221(1000 grain weight) exhibited highly significant and maximum sea effectsfor the respective characters.The sea variances were higher than gca for all the characters exceptpeduncle length and ear length indicating the role of dominant gene in the expression of these characters. High heritability was also observed foralmost all the characters. The grain yield per plant was positively andsignificantly associated with grain yield per earhead, productive tillers perplant, panicle weight and 1000 grain weight.Based on the present studies, it may be concluded that, thecombinations, RHRB-16A x RHRBI-1132 and RHRB-17A x RHRBI-1176could be used to exploit heterosis and therefore recommended for multilocationevaluation. The female parents RHRB-16A and 17A and maleparent RHRBI-1307 were identified as the best combiners and could beused in various breeding programmes for improvement in pearl millet.
Subject: Genetics and Plant Breeding
Theme: Genetics and Plant Breeding
These Type: M.Sc
Issue Date: 2006-06-30
Appears in Collections:Thesis

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