ICAR Research Data Repository for Knowledge Management
“COMBINING ABILITY AND HETEROSIS FOR YIELD AND COMPONENT TRAITS IN RICE (Oryza sativa L.)”
KrishiKosh
View Archive Info| Field | Value | |
| Title |
“COMBINING ABILITY AND HETEROSIS FOR YIELD AND COMPONENT TRAITS IN RICE (Oryza sativa L.)”
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| Creator |
Verma, Mamta
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| Contributor |
Rao, S.S.
Sharma, Deepak Dantre, R.K. Saxena, R.R. |
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| Subject |
COMBINING ABILITY, HETEROSIS, YIELD, RICE (Oryza sativa L.)
Genetics and Plant Breeding |
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| Description |
A study entiltled “Combining ability and heterosis for yield and component traits in rice (Oryza sativa L.)” was conducted at Research Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C. G.) during Rabi season 2008-2009 and Kharif 2009 to determine the extent of variability, to access the GCA effects of parents and SCA effects of crosses, estimate the magnitude of heterosis for various yield and related traits and to identify the maintainers and restorers for CMS lines under study. The experimental material consists of three CMS lines viz., CRMS 31A, IR 68888A and CRMS 32A and five testers viz., HRR-1, HRR-2, IET 20146, Jal Punga and JGL 11679 and resulting fifteen hybrids were produced in line x tester pattern. These parents and hybrids were raised in Randomized Complete Block Design (RCBD) with two replications during kharif 2009. Observations were recorded for the different characters viz., days to 50 per cent flowering, plant height, productive tillers per plant, panicle length, spikelet fertility percentage, Pollen fertility percentage, total number of spikelets per panicle, thousand grain weight and grain yield per plant. Analysis of variance revealed that variance due to the line x tester was significant for all the characters. This suggested that sufficient variability is present in materials used for present study. Combining ability analysis was carried out following line x tester analysis. The analysis revealed the predominance of non-additive gene action for the fifteen characters under study. This suggests the possibility of exploiting heterosis in the materials. Among the female parents CRMS 31A, IR 68888 A and CRMS 32 A were found as good general combiners for grain yield per plant and its related characters respectively. All the testers were found as good general combiners for yield and its related characters respectively. Hybrids CRMS 32A/ HRR-2 for days to 50 per cent flowering and total spikelets number per panicle, IR 68888A/ Jal Punga for plant height, IR 68888A / HRR-1 for productive tillers per plant, CRMS 31A/ Jal Punga for panicle length, CRMS 31A/ IET 20146 for pollen fertility, CRMS 32A/ Jal Punga for spikelet fertility, IR 68888A/ IET 20146 for thousand grain weight and CRMS 32A/ Jal Punga for grain yield per plant were found as good specific combiners. Crosses CRMS 31A / HRR-2, IR 68888A/ HRR-2 and CRMS 32A / JGL 11679 were identified as good heterotic hybrids for grain yield per plant and other associated traits. These promising hybrids offer greater scope for further exploitation of hybrid vigour commercially. Based on the pollen fertility percent and spikelet fertility percent, three genotypes were identified as potential restorers. Among which genotypes HRR-2 and Jal Punga were identified as potential restorers for CRMS 31A, HRR-1 and HRR-2 were identified as a potiential restorer for IR 68888A, where as JGL 11679 is potential restorer for CRMS 32A. The frequency of partial maintainers was quite higher than restorers. |
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| Date |
2016-12-22T11:05:03Z
2016-12-22T11:05:03Z 2010 |
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| Type |
Thesis
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| Identifier |
http://krishikosh.egranth.ac.in/handle/1/92083
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| Language |
en
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| Format |
application/pdf
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| Publisher |
Indira Gandhi Krishi Vishwavidyalaya, Raipur
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