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International Journal of Applied Agricultural & Horticultural Sciences
  • 28 March, 2024
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Language : English
DOI Prefix : 10.37322
P-ISSN : 0974-0775
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Vol. 6 (6) : November-December 2015 issue
Green Farming Vol. 6 (6) : 1229-1233 ; November-December, 2015
Genetic evaluation for yield and yield contributing characters in rice (Oryza sativa L.)
VIVEK A. PATILa1, AMOL E. PATILb2*, NITIN G. GAWANDEb3 and R.D. VASHIa4
aDeptt. of Genetics & Plant Breeding, N.M. College of Agri., Navsari Agri. University, Navsari - 396 450 (Gujrat) bDepartment of Agricultural Botany, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani - 431402 (M.S.)
Designation :  
1P.G. Student, 2,3Ph.D. Scholar *(amolepatil88@gmail.com), 4Prof.
Subject : Crop Genetics and Plant Breeding
Paper No. : P-3014
Total Pages : 5
Received : 15 December 2014
Revised accepted : 17 October 2015
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Citation :

VIVEK A. PATIL, AMOL E. PATIL, NITIN G. GAWANDE and R. D. VASHI. 2015. Genetic evaluation for yield and yield contributing characters in rice (Oryza sativa L.). Green Farming Vol. 6 (6) : 1229-1233 ; November-December, 2015

ABSTRACT
Line x tester analysis using a set of four females (lines) and ten males (testers) was carried out to estimates the extent of heterosis and combining ability for yield and its components in rice (Oryza sativa L.). Experimental material comprising fourteen parents, their forty hybrids were planted in a randomized block design with three replications during kharif 2010 at the National Agricultural Research Project farm, Navsari Agricultural University, Navsari. Analysis of variance for all the characters revealed that parents and hybrids differed significantly for all the characters, indicating considerable amount of genetic variability in the material studied. Parents vs hybrids comparison was found significant for all the characters except panicle length, plant height, and grain yield per plant indicating substantial amount of heterosis among hybrids. Among the parents, NAUR-1, Pusa Sughandh-5, and Indrayani were the best performing parents for grain yield per plant and some of its related attributes. High magnitude of heterobeltiosis was observed for test weight, grain yield per plant, grains per panicle, panicle length, days to 50 % flowering, and 1000 grain weight. Crosses NAUR-1 x Indrayani, NAUR-1 x Pusa Basmati-370 and NVSR-6029 x Pusa Sughandha-5 were found to be most heterotic for grain yield per plant. Simultaneous increase in grains per panicle and panicles per plant had positive effects towards higher grain yield. The per se performance of hybrids were, in general related to the heterotic response in majority of characters. This indicated that the selection of crosses on the basis of per se performance or heterotic response would be equally important. Combining ability analysis revealed that both GCA and SCA variances were important for inheritance of various traits under study. However, SCA variances were higher than GCA variances for all the characters, which indicated that non-additive gene action was predominant in the expression of the traits. The estimation of GCA effects for parents revealed that female NAUR-1 was observed good general combiners for yield contributing traits, whereas in males Pusa Sughandh-5, Indrayani & Pusa Basmati-370 were good general combiner for yield & yield contributing characters. The best specific cross combinations were average x average, avg. x avg. & poor x good respectively for grain yield per plant.
Key words :
Combing ability, Grain yield, Heterosis, Heterobeltiosis, Rice, Yield characters.