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Genetic analysis for yield and its compone nt traits over locations in Rice (Oryza sativa L.)

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Title Genetic analysis for yield and its compone nt traits over locations in Rice (Oryza sativa L.)
 
Creator SHINDE, DHEERAJ A.
 
Contributor PATEL, P.B.
 
Subject rice, crossing over, planting, heterosis, developmental stages, hybrids, biological phenomena, starch, grain, research methods
 
Description In t he prese nt i nves ti gatio n, i nfo rmatio n re gar di ng
magnit ude o f heterosis , e stimates of combi ni ng abil it y, nat ure of ge ne
actio n, G x E int er actio ns and s t abilit y par ameters were estimate d for
gr ai n yie l d per pl ant and ni ne o t her compo ne nt tr aits usi ng li ne x test er
anal ysi s i nvol vi ng fo ur females , te n males and t heir res ult ant for t y
crosses e val uate d at t hree loc at io ns dur i ng khar if -2011 .
Si gnif ic ant di f fere nces we re not ice d amo ng ge not ypes ,
pare nts and hybri ds for all t he c har acters st udie d. Si gnific ance of
pare nts vs . hybri ds compari so n s howe d e xiste nce of o ver all het erosis .
Si gnif ic ance of pare nts x loc atio ns and hybri ds x loc atio ns i nter act io ns
suggeste d t hat pare nt s and hybri ds i nte r acte d differe ntl y wit h differe nt
enviro nme nts . A co nsi de r able de gree of he terosis i n de sire d direct io n
was manife ste d by many hybri ds o ver better par e nt and i n res pect of
gr ai n yiel d per pl ant and vario us compo ne nt tr ai ts. Si gnific ant posit i ve
heterot ic effects and hi gh per se per formance wit h re gar ds to gr ai n
yiel d per pl ant were reco r de d by t he hybri ds viz ., NVSR-178 x
NAUR-1, IR-28 x NAUR-1 and NVSR-178 x IET-21682 . To t al te n
hybri ds e xhi bite d si gni fic ant po siti ve het erosis o ver better pare nt for
gr ai n yiel d per pl ant .
Combi ni ng abilit y anal ysis re ve ale d import ance of bo t h
additi ve and no n- addit i ve ge netic compo ne nts for most of t he t r aits .
Howe ver , combi ni ng abi lit y st udies i ndic ate d t hat no n- addi ti ve ge ne
actio n pl aye d import ant role i n t he e xpressio n of al l t he tr aits e xce pt
pl ant hei ght and L: B r at io.
The s ca and g ca vari ances were fo und to be i nfl ue nce d by
the e nviro nme nt al differe nces for most o f t he tr aits as e vi de nt from
diffe re nces i n r at io of g ca/s ca to g ca x loc atio ns/s ca x loc atio ns .
Amo ng females NVSR-178 and amo ng males NAUR-1 ,
IET -21682 , RP-4075-129-07-3 and IR8 1025-B-116-1 e xhi bite d hi gh
gc a ef fects for gr ai n yiel d per pl ant and were o bser ve d as goo d ge ner al
combi ner for yie l d and mo st of its co ntr i buti ng c har acters and t hese
may be ut ili ze d i n f urt her bree di ng pro gr amme.
The crosses wit h hi gh sc a eff ects were i n ge ner al
combi natio ns of pare nts wit h goo d x goo d, goo d x poor or
goo d x aver age and poor x poor g ca effec ts. The fre que nc y of
goo d x goo d was o bser ve d more . This was re pr ese nte d i n best t hree
hybri ds for gr ai n yie l d per pl ant viz. , NVSR-178 x NAUR-1
(goo d x goo d) , NVSR-178 x IET-21682 ( goo d x goo d) and
IR-28 x NAUR-1 ( poor x goo d) had si gnific ant desire d s ca effec ts
and si gnific ant desire d hetero tic res po nse o ver better pare nt . The
freque nc y of goo d x goo d was more . Amo ng to p te n hybr i ds, for s i x
hybri ds viz ., NVSR-178 x NAUR-1, NVSR-178 x IET-21682 ,
NVSR-176 x IR81025-B-116-1 , NVSR-178 x RP -4075-129-07-3 ,
NVSR-176 x IET-21682 and NVSR-176 x NAUR-1 bo t h of the ir
pare nts were fo und to be goo d ge ner al combi ners .
Phe not ypic st abili t y anal ysi s re ve ale d si gnific ant
diffe re nces amo ng all t he i nter ac tio ns [ge not ypes, e nviro nme nts (E) ,
G x E i nter ac tio n, e nviro nme nt s (Li ne ar) and G x E (Li ne ar) ] for all t he
char acte rs whe n teste d agai nst t he poole d error and poole d de vi at io n
exce pt t he me an s quares due to poole d de vi atio n for days to 50 per cent
floweri ng and amylo se co nte nt , whe n teste d agai nst poole d error ,
whic h s uggeste d import ance of bot h li ne ar and no nli ne ar compo ne nts i n
buil di ng up tot al G x E i nter act io n.
The best t hree hi gh yiel di ng and st able hybri ds o ve r
enviro nme nts for gr ai n yiel d per pl ant were NVSR -178 x NAUR-1 ,
NVSR-178 x IET-21682 and NVSR-176 x IR80501-B-96 -1-B. The
hybri d, NVSR-178 x NAUR-1 was fo und to be st able for days to 50 per
cent floweri ng, panicle le ngt h, number of gr ai ns per panicle , gr ai n
yiel d per pl ant , amylose co nte nt and prote i n co nte nt .
On t he basis of per se per formance, hetero sis, combi ni ng
abili t y and st abilit y o ve r envi ro nme nts , cross combi natio n NVSR-178 x
NAUR-1 was fo und to be t he most promisi ng and may be e xploite d i n
pr acti c al pl ant bree di ng pro gr amme. The s ame may be e val uate d
critic all y to j udge its s uperiori t y i n performance wit h s t abilit y acro ss
the ye ars and soil t ype for i ts utilit y o n commerci al sc ale.
Fi ndi ng co nfirms t hat ri ce cro p has vast so urce o f
vari abi lit y whic h c an be effecti ve l y e xploite d to pro duce hi ghl y
heterot ic cross combi natio ns and varieties s uit able for aero bic
condit io ns. It is t he ultimate sol ut io n for pro bl ems re gar di ng rice
pro ducti vi t y i n t he worl d, whic h are c halle nge d by i ncre asi ng foo d
demand and t hre ate ne d by decli ni ng water avail abi lit y, c an effecti ve l y
be sol ve d by pl ant bre e ders.
 
Date 2016-05-03T14:56:07Z
2016-05-03T14:56:07Z
2013-08
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65750
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari