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COMBINING ABILITY ANALYSIS INVOLVING AROMATIC LINES FOR GRAIN QUALITY TRAITS IN RICE (Oryza sativa L.)

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Title COMBINING ABILITY ANALYSIS INVOLVING AROMATIC LINES FOR GRAIN QUALITY TRAITS IN RICE (Oryza sativa L.)
 
Creator GONYA NAYAK, P
 
Contributor SREEDHAR, M
 
Subject heterosis, rice, crossing over, grain, biological phenomena, hybrids, yields, developmental stages, additives, genes
 
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
 
Date 2016-06-24T11:37:39Z
2016-06-24T11:37:39Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67908
 
Language en
 
Relation D8808;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY