HETEROSIS AND COMBINING ABILITY ANALYSIS FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN HORSEGRAM (Macrotyloma uniflorum [Lam.] Verdc.)
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Title |
HETEROSIS AND COMBINING ABILITY ANALYSIS FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN HORSEGRAM (Macrotyloma uniflorum [Lam.] Verdc.)
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Creator |
RAKESH ALLE
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Contributor |
HEMALATHA, V
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Subject |
HETEROSIS, COMBINING, ABILITY, ANALYSIS, YIELD, CONTRIBUTING, CHARACTERS, HORSEGRAM
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Description |
The present investigation “Heterosis and combining ability analysis for yield and yield contributing characters in horsegram (Macrotyloma uniflorum [Lam.] Verdc.), had been undertaken to carry out combining ability analysis, to estimate heterosis, to understand the nature of gene action, correlation and path analysis of yield and yield contributing characters. The experimental material for the present investigation comprised of twenty seven F1 crosses, their twelve parents and one check. The material was obtained from Regional Agricultural Research Station, Palem, ANGRAU. This material was evaluated during late kharif 2013. Each entry was sown in two rows of 5 m length with a uniform spacing of 45 x 15 cm in a Randomized Block Design (RBD), replicated thrice at College Farm, College of Agriculture, Acharya N. G. Ranga Agricultural University, Rajendranagar, Hyderabad. The data was collected on days to 50 per cent flowering, days to maturity, plant height (cm), number of primary branches, number of clusters per plant, number of pods per cluster, number of pods per plant, pod length (cm), number of seeds per pod, 100 seed weight (g) and seed yield per plant (g). The analysis of variance revealed significant differences among the genotypes for all the characters studied. The study of analysis of variance for combining ability revealed the predominance of non-additive gene action for all the traits favouring the exploitation of heterosis breeding. High general combining ability effects for grain yield per plant and other yield component characters were noticed in the lines HGP-67, HGP- 40 and HGP-44 and testers Palem-2 and AK-42. These parents had resulted in production of superior single crosses HGP-40 x AK-42, HGP-67 x Palem-2, HGP-44 x Palem-2 and HGP-80 x AK-42 for seed yield per plant. Hence, these crosses had potential application in the crop improvement programmes. Estimates of heterosis, heterobeltiosis and standard heterosis were variable among crosses in desirable direction and some of them turned out to be best specific crosses. The cross combinations HGP-67 x Palem-2, HGP-40 x AK-42, HGP-67 x AK-42, HGP-44 x Palem-2 and HGP-80 x AK-42 were top five crosses based on mean per se performance, sca effects and heterosis and these crosses had high seed yield and yield contributing characters. Character association among yield and yield contributing characters revealed the positive association of seed yield per plant with 100 seed weight, number of pods per plant, number of clusters per plant, number of primary branches, number of pods per cluster, pod length, number of seeds per pod, plant height and days to 50 per cent flowering and negatively correlated with days to maturity. Path coefficient analysis had shown direct positive relationship of 100 seed weight, plant height, number of pods per plant and days to 50 per cent flowering with seed yield per plant. The top five superior cross combinations identified in the present investigation HGP-67 x Palem-2, HGP-40 x AK-42, HGP-67 x AK-42, HGP-44 x Palem-2 and HGP- 80 x AK-42 based on per se performance, heterosis and combining ability for seed yield and yield contributing characters. These crosses may be further tested before releasing as commercial hybrids. |
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Date |
2016-09-07T13:51:37Z
2016-09-07T13:51:37Z 2014 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/75924
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Language |
en
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Relation |
D9516;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
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