TESTING OF INTRODUCED GERMPLASM OF MAIZE BY LINE X TESTER MATING SYSTEM: II PHENOTYPIC TRAITS
Field experiment was conducted at the field of Field Crops Sci. College of agric. Univ. of Baghdad. Ten inbred lines introduced from Italia were tested in Iraqi central environments for general and specific combining ability by using Line x tester mating method. Planting date was on spring and fall of 2009, selfing was used to increase homozygosity. On spring season 2010 seeds were planted, at anthesis crossing between inbreds and tester was done. On fall season/ 2010 for crosses and parents using RCBD with four replications to evaluate and estimate some genetic parameters. The results of statistical analysis for these parents and their crosses were highly significant differences for all traits: Genetic analysis shows superiority the inbred L3 in gca for plant and ear height, and no. of leaves. The cross L1 x t8 gave high no. of rows and longer ear (20.8cm and 18.8 cm and gave highly positive hybrid vigor for no. of rows and ear length 34.19 row and 11.24 cm and high no. of leaves and gave high sca for no. of rows and leaves Additive variations for inbreds were more than testers for all traits except no. of leaves and ear length, so it's more than non additive gene action. The s 2 gca for inbreds was more than testers for plant and ear height, leaves area and no. of rows. s 2 gca/ s 2 sca were less than one for all inbreds and testers traits except no. of leaves and ear length for testers. Some traits controlled by over dominance where average degree of dominance was more than one, while other traits controlled by partial dominance where a was less than one. We can conclude the possibility of using superior inbrds to produce hybrids or use selection for it and produce synthetic variaties jm @yqr`l @y`rzl mwl`l @l 43 2 45 55 2012 byhw 54 @mdqml @lls rbtkh @qyrT d`t x dH fshk @mdkhtsml qy' rTl SHwfl bl kldhkw thmk @yqnl tllsl mywqt yf kwls @fr`ml h 'w hy'd rytkhw lDfl' hnm m @rshbm jtnl fnS' ylHml fnSll @ryGm @dydj w' hlkhdl yf dwm ~l` lwSHll ylHml `m byrDtlw @fltkhm @ybrt jm rb lylHt d`y @bwGrm @ny`m tfS yf ylHml qwft @yth rw @ylbq flty'l @d' bkhtnl @mh bla `m @bwGrml wSHl tmwl`m ~l` l rdqmw `ybT Skht t ryth'tl @ymkl @fSl mkHt ytl @ynyjl 2 hkwls @fr`mw hy'd'w bkhtnl tbyrDtl yf lDfl' Sykhshtw byrDtll hnm njhl w' fnSl' @d`wl 3 yf tllsl myyqt dn` jtn nylm` knh rfSl @rdhl njh nymh Sykhsht mh ywqtw @Skh qyfwt yf hkwls mywqtw hsfn @llsl m jtnl rbtkh mty dhl nyjh d' rydqtb tllsl flty'l @ylbq @Skhlw @m`l 1 w 5 w 6 nythHbl nm lk jtnts 7 w 8 w 9 w 11 w 17 ~l` dmt`t SHf lDf' dydHt @Srf n' llsl lDf' Sykhsht ~l` htylbqw hmdkhts @lwhs t ~l` lwSHl @bw`Sl 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rwdhb ~l` D`b `m hd`bts mt tbyrDtl D`b nm jmnrbb yth rwl lylHtl my'lt yk @Hjnl tbyrDtl Spare2 nySHf `m tlls `brl' tbyrDt nmth tqbt tbyrDtl hdhh t`rz hy'baw @mdkhw @brtl ryDHt d`b bsl mswml yf mk lwSHml qfw ~l` @nrqm @brjt yf q mymSt RCBD r'b hnyb @fsml zwrm ~l` t rrkm `b 75 jm @yqr`l @y`rzl mwl`l @l 43 2 45 55 2012 byhw 54 rwjl nybw ms 25 ms tnybl tljs ryhztl mmt d`b q rwl' dd`w Swnr`l `ftrw tbnl `ftr tfS n` hfwfS dd`w Swnr`l lwTw htHsmw tnybl tllH jmnrb qfw @swrdml tfSllw @yth rwl byk rtll Spare 2 hrkdh m bsHw Singh w Chaudhary 18 trdq hnmw tbthl jdhwmnl qfw ~rkhl' @yth rwl ml`ml @shqnmlw jy'tnl htbyrDtw blal tfSl myq Tswtm lwdj HDwy 1 bla kldhkw @yth rwl byk rtl fltkh mhnyb lkhdtlw SHwflw tllslw tbyrDtl dD blaw l` fltkh @fS nthtsb @swrdml tfSl lkl @ywn`ml y lwT @fSw SHwfll hfwfS dd`w Swnr`l `ftr `ftrb hnyb myf tllsl tfltkh tllsll Swnr`l hl` Glb dqw tbnl 145.5 @llsll ms L7 hbsh dqw lwdj( m`l Tswtml 1 h`ftr nkf tllsl @yqb m' lq SHfl yf tbnl `ftr Glb dqw m`l Tswtml nm t 8 tllsl rSq 118 byrDtl qwft .Tqf ms L3 xt10 ~l` h`ftr Glbw blw tbyrDtl @yqb 167.8 mk ms tbyrDtl tT` L7xt10 w L4xt8 w L3xt8 w L7xt8 rDtl @yqb m' m`l Tswtml nm ~l` tbnll `ftr tby @llsl tqwft kldhk m`l Tswtml nm lq h`ftr nkf hsfn L7 Glb ydhl Swnr`ll `ftr ~l` yf 70.3 ms yy'SH hthbsh dqw m`l Tswtml n` qrfy ml ydhlw @llsl L3 yf m`l Tswtml tllsl nm y' zwjtt mlw l` Swnr`ll `ftr tbyrDt ts tT` nyH nm byrDtl hl` nkw m`l Tswtml L7xt10 qrfy ml ydhl byrDtl n` L3xt8 bl' qwftl kldhw L7 w L3 `ftrb tqwft tllsl @yqb n` Swnr`l ntllsl L3 w L7 tyT` dh tbnl q rw' dd`b Dy' 11.9 w 11.1 tbnll @qrw lwdj 1 Tswtm t`brml lylHtl nybtl Tb @qyr @lls x SHf tfSll @swrdml No. of rows ear length cm Leaves area m2 No. of leaves /plant Ear height cm Plant height cm df S.O.V 0.209 0.387 0.000 0.61 9.62 0.542 3 Reps 24.634* 7.626* 0.014* 5.32* 314.92* 756.83* 13 Genotypes 2.267* 12.767* 0.006* 4.67* 167.34* 415.84* 5 Parents 31.352* 8.595* 0.118* 30.43* 2082.57* 5126.10* 1 Parents vs crosses 8.222* 3.816* 0.006* 2.20* 167.82* 376.21* 7 Crosses 26.899* 1.031ns 0.001* 1.94* 277.62* 526.08* 3 Lines 0.165ns 15.680* 0.001* 6.66* 9.03ns 78.13* 1 Tester 15.338* 2.646* 0.012* 0.97* 110.95* 325.71* 3 Lxt 0.805 0.523 0.0001 0.32 8.85 4.003 39 error jm @yqr`l @y`rzl mwl`l @l 43 2 45 55 2012 byhw 54 lwdj 2 Tswtm myq tfSl blal htbyrDtw nm ts n' l' q rwl' dd`l m`l Tswtmll @hbshm yhw m`l Tswtml qf tbnl q rwl' dd` tT` dq tbyrDtl hl` nk 13.3 w 11.8 byrDtl nm lkl @qrw L3xt10 w L7xt10 nybyrDtl nydhh ywb' dH nkw L3 w L7 nyqwftml l @yqb ~l` q rwl' dd`b tlls tqwft SHfl @llsl t10 @Hsm tT`'w tbnl q rw' @Hsmb tllsl @yqb ~l` m`l Tswtml tqf q rw' 2.111 m 1 dqf tbyrDtl m' nybyrDtl nthtsb m`l Tswtml hlk tqf L1xt10 w L4xt10 wh mhywb' dH n' mGr t10 ~l` ~T` dq ydhl Hfl dhh n' l' q rw' @Hsm @llslb hbyrDt dn` S L7 qwftm byrDt tT` q rw' @Hsm lq tT` dq tnk ytl ydhlw m`l Tswtml ~tHw tllslw tbyrDtl @yqb ~l` htmyq tGlb 2.511 m 1 @llsl tqwft L3 Swnr`l lwTb Swnr`l lwT Glbw m`l Tswtml ~l`w tllsl @yqb ~l` hyf 19.3 l ms @llsl `m hbyrDt n t10 ~T` dq lqw tbyrDtl @yqb nm lq hyf Swnr`l lwT Glb byrDt byrDtl qwftmnyb m`l Tswtml nm L1xt8 lwT' ~T`'w Swnr` 18.8 ms @llsl tnkf fwfSl dd` m' t8 dq hSwnr`l fwfS dd` tT`'w tllsl @yqb ~l` tqwft Glb 15.5 m whw fS m m`l Tswtml fwfS dd`l hbsh byrDtl hyf qwft dqf tbyrDtl L1xt8 ~T`'w dd` ~l Swnr`l fwfSl 12.8 fS nyjhl @wq lwdj HDwy 3 @swrdml tfSll tbyrDtll nyjhl @wq myq byrDtl ~T` L4xt8 byrDtlw L3xt10 @wql @myq ~l` tbnl `ftr @fSl nyjhl Glb 15.12 w ms 19.13 ms tnkf Swnr`l `ftr yf m' .tbyrDtl @yqb ~l` nqwftm byrDtll nyjhl @wql @myq ~l` L3xt8 byrDtlw L7xt10 No. of rows Ear length