COMBINING ABILITY ANALYSIS INVOLVING AROMATIC LINES FOR GRAIN QUALITY TRAITS IN RICE (Oryza sativa L.)
KrishiKosh
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Title |
COMBINING ABILITY ANALYSIS INVOLVING AROMATIC LINES FOR GRAIN QUALITY TRAITS IN RICE (Oryza sativa L.)
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Creator |
GONYA NAYAK, P
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Contributor |
SREEDHAR, M
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Subject |
heterosis, rice, crossing over, grain, biological phenomena, hybrids, yields, developmental stages, additives, genes
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Description |
The present investigation has been undertaken in rice to carry out the combining ability analysis and to estimate heterosis, heterobeltiosis and standard heterosis as well as to understand nature of gene action. Four lines and four testers were selected and crossed in Line x Tester fashion during kharif, 2010. The resulting 16 crosses along with parents and a standard check viz., Sugandha Samba were evaluated in Randomized Block Design replicated thrice during rabi, 2010-11 at Rice Section, Agriculture Research Institute, Rajendranagar, Hyderabad. The combining ability analysis revealed importance of both additive and non-additive gene actions in governing the characters but non-additive gene action was found predominant. Non-additive gene action primarly governed hulling recovery, milling recovery, head rice recovery, kernel length after cooking, kernel breadth after cooking, kernel elongation ratio, volume expansion ratio, water uptake, aroma, alkali spreading value and protein content and grain yield plant-1. Additive gene action was important for kernel length, kernel breadth, Length/Breadth ratio. Among the parents Yamini, Pusa-1121 and BM-71 were good combiners for physical quality characters viz., kernel length and L/B ratio. Yamini and Pusa – 1121 contributed maximum favourable genes for cooking quality attributes viz., kernel length after cooking, volume expansion ratio and aroma. For chemical quality characters viz., alkali spreading value and protein MTU-1010 was identified as potential parent in imparting its superior qualities to the progenies. Yamini contributed maximum favourable genes for grain yield. These parental lines had desirable per se and therefore are identified for component breeding to improve these traits. Multiple crossing among these to pool the genes in improving rice grain quality is suggested. The estimates of heterosis, heterobeltiosis and standard heterosis were variable among the crosses. Heterosis in desirable direction was recorded for important quality attributes viz., head rice recovery (22.16%), kernel length (10.28%), L/B ratio (12.84%), kernel elongation ratio (14.17%), volume expansion ratio (22.10%), aroma (35.21%) and grain yield (89.25%). Some of these heterotic crosses have turned out to be best specific crosses. Ranbir Basmati x MTU-1081 (milling percentage), RNR-2354 x MTU-1081 (head rice recovery), Pusa-1121 x BM-71 (kenel length), RNR-2354 x MTU-1081 (kernel breadth), Pusa-1121 x MTU-1081 (kernel length after cooking), Ranbir Basmati x Sye-632003 (kernel breadth after cooking), Pusa-1121 x MTU-1081 (kernel elongation ratio), Pusa- 1121 x MTU-1081 (volume expansion ratio), RNR-2354 x Sye-632003, Yamini x MTU-1081 (water uptake), Yamini x Sye-632003, Pusa-1121 x MTU-1081 (aroma), Pusa-1121 x BM-71, Ranbir Basmati x MTU-1081 (alkali spreading value and protein) were the best specific crosses and had desirable per se and therefore these can be used in recombination breeding to spot true breeding progenies. Considering the yield and grain quality parameters the top yielding specific crosses viz., Ranbir Basmati x Sye-632003, Yamini x Sye-632003, RNR-2354 x MTU-1081 and Pusa-1121 x MTU-1010 were also found to be the best specific crosses which have performed exceedingly well for yield and quality parameters |
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Date |
2016-06-24T11:37:39Z
2016-06-24T11:37:39Z 2011 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/67908
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Language |
en
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Relation |
D8808;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
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