Asian Journal of Bio Science

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Study of Combining Ability Using CMS Line in Hybrid Rice (Oryza sativa L.)


Affiliations
1 Department of Genetics and Plant Breeding, Pilikothi Farm of Tilak Dhari Post Graduate College, Jaunpur (U.P.), India
     

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Combining ability revealed higher specific combining ability variance than their respective general combining ability variances indicating the predominance of non-additive gene effects indicated relevance of heterosis breeding for improving the yield and yield contributing attributes. Among the testers high GCA was recorded in Sarjoo 52 and Narendra Usar 3 for harvest index, grain yield plant-1, days to 50% flowering (earliness), plant height (dwarf stature), panicle bearing tillers plant-1 and biological yield. Among the female parental lines, IR 58025 was observed as a good general combiner only for seedling height, panicle length, spikelets panicle-1, test weight, biological yield palnt-1. Cross between IR 688897A X Sarjoo 52 , IR 58025 A X 21-2-5-B-1-1, IR 58025 A X Narendra Usar 3 and IR 58025 A X IR 71829-3R-73-1-2-B shown favorable per se performances and higher significant positive SCA effects in related to grain yield plant-1. These combinations proved to be good hybrids based on CMS system in rice.

Keywords

Combining Ability, Line X Tester, Rice Hybrids.
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Abstract Views: 375

PDF Views: 28




  • Study of Combining Ability Using CMS Line in Hybrid Rice (Oryza sativa L.)

Abstract Views: 375  |  PDF Views: 28

Authors

Sujeet Kumar
Department of Genetics and Plant Breeding, Pilikothi Farm of Tilak Dhari Post Graduate College, Jaunpur (U.P.), India
Alok Kumar Singh
Department of Genetics and Plant Breeding, Pilikothi Farm of Tilak Dhari Post Graduate College, Jaunpur (U.P.), India

Abstract


Combining ability revealed higher specific combining ability variance than their respective general combining ability variances indicating the predominance of non-additive gene effects indicated relevance of heterosis breeding for improving the yield and yield contributing attributes. Among the testers high GCA was recorded in Sarjoo 52 and Narendra Usar 3 for harvest index, grain yield plant-1, days to 50% flowering (earliness), plant height (dwarf stature), panicle bearing tillers plant-1 and biological yield. Among the female parental lines, IR 58025 was observed as a good general combiner only for seedling height, panicle length, spikelets panicle-1, test weight, biological yield palnt-1. Cross between IR 688897A X Sarjoo 52 , IR 58025 A X 21-2-5-B-1-1, IR 58025 A X Narendra Usar 3 and IR 58025 A X IR 71829-3R-73-1-2-B shown favorable per se performances and higher significant positive SCA effects in related to grain yield plant-1. These combinations proved to be good hybrids based on CMS system in rice.

Keywords


Combining Ability, Line X Tester, Rice Hybrids.

References