Selection of Brahman crossbred-breeding bulls based on phenotypic performance

Transcription

1 Sltion of Brhmn rossr-ring ulls s on phnotypi prformn MM Hqu 1, MA Hoqu* 1, NG Sh 1,2, AKFH Bhuiyn 1, MM Hossin 3, MA Hossin 4 1 Dprtmnt of Animl Bring n Gntis, Bnglsh Agriulturl Univrsity, Mymnsingh; 2 Dprtmnt of Gnrl Animl Sin n Nutrition, Ptukhli Sin n Thnology Univrsity, Ptukhli, 3 Dprtmnt of Animl Sin, Bnglsh Agriulturl Univrsity, Mymnsingh, 4 Upzil Livstok Offi, Chirirnr, Dinjpur, Bnglsh Astrt A f r vlopmnt projt ws rri out in th Dprtmnt of Livstok Srvis (DLS) in 2009 in slt rs of Bnglsh. Unr this projt, smn of Brhmn ulls wr import from th USA n us to insmint inignous ows to prou gr lvs. Th prsnt stuy ws unrtkn to slt gr Brhmn ulls of th forsi projt for ring purpos. Using th t of Brhmn gr-1 popultion, 4 (four) ulls wr slt s on xtrnl pprn, phnotypi prformn n liio. Rors on 233 Brhmn gr-1 lvs (127 ml n 106 fml) wr nlyz y SAS omputr progrm. Birth wight, yrling wight n vrg ily gin wr stimt y onsiring sx n r groups. Th irth wight ws foun to 22.25±5.60 Kg for ml n 20.33±3.88 Kg for fml lvs (vrg 21.38±4.98 Kg). Th yrling wight of ml n fml lvs ws foun to ±73.21 n ±69.04 Kg, rsptivly. Highst yrling wight n vrg ily gin wr foun in Chrght (401.11±39.75 kg n ± g, rsptivly) whil lowst vlus wr in Thkurgon r (152.69±52.74 Kg ± g, rsptivly). Th vrg ily gin ml n fml lvs wr ±193.7 n ± g, rsptivly. Ar n sx h highly signifint (p<0.001) ffts on irth wight, yrling wight n vrg ily gin of lvs. Th vrg ily gin of four slt gr Brhmn ull lvs ws 731 g. Th stimt sltion iffrntil n sltion intnsity for vrg ily gin of th four ulls wr g n 2.263, rsptivly. Th growth prformn long with stimt sltion intnsity n sltion iffrntil for vrg ily gin init tht ths slt gr Brhmn ring ulls my gnrt goo opportunity to improv inignous ttl for f purposs. Ky wors: Brhm ull, growth prformn, sltion frntil, sltion intnsity Bnglsh Animl Husnry Assoition. All rights rsrv. Bng. J. Anim. Si (2): Introution Bnglsh hs grt mn of mt n th onomi nvironmnt of toy's f usinss is hllnging. Commril ow-lf prours r ing f with optimizing numr of onomilly importnt trits, whil simultnously ruing osts of proution in orr to rmin omptitiv. Trits suh s rproution, growth n mtrnl ility; ll r influning th proutivity n profitility of th f ntrpris. To fulfill ov rquirmnt for f inustry, wll opt f ttl gnotyp shoul vlop in Bnglsh. Th ttl rsours of Bnglsh r mostly of inignous typ (Bos inius) with sustntil numr of ross Sinhi, Shiwl, Jrsy n Holstin- Frisin. A fw vritis of ttl lik R Chittgong, Pn Milking Cttl, Munshignj, Mripur n North Bngl gry t r loliz in som rs of th ountry, n whih r * Corrsponing Author: zhrhoqu@yhoo.om minly ing rring for milk n to som xtnt for mt. As thr is no f typ niml in th ountry, th frmrs r frquntly ing involv in fttning of ithr lol or upgr iry ross ull lvs for inrsing th f proution in Bnglsh. Consiring wthr, gro-limti onition, ht tolrn, iss n inst rsistn, longvity, grzing ility, lving s, mothring ility n mngmnt, Brhmn r is onsir to th most suitl n omptil f r in tropil n su-tropil rgion. A numr of Amrin f rs hv n vlop using Brhmn gnotyps.g. Brngus, Bfmstr, t. Brhmn ulls wigh from 800 to 1,100 kg n ows from 500 to 700 kg n lvs grow vry rpily ftrwr ompr to othr rs (Colitz n Kllwy 1972). Th Brhmns r known to wll 60

2 Hqu t l. (2012) Bng. J. Anim. Si. 41 (2): pt in rgions of hrsh limts n poor grzing. Thy hv grtr ility to withstn ht. Thy hv mr swt glns n th ility to swt frly through th pors of th skin, whih ontriuts to thir ht tolrn. Thir oily skin thought to hlp rpl psts n insts long with smooth ot. Thy r lso mor rsistnt to prsits n isss. For ths hrtristis Brhmns hv n xtnsivly ross with ttl in tropil rs of th worl to xplor thir vntgs in hot limts. Th onomi nfits otin from rossring systm n grt, ut ffiy of th systm pns upon th propr mting of ows to suprior n unrlt ulls (Olson 2011). If propr rossring progrm n run thn intrst frmr n hv suitl niml for f proution n th ountry will gt som mor mt s niml protin. Convrsly, th rs tht r los to inignous stok lwys r grtr importn for tht prtiulr ountry or rgion us thy n thriv sily in lol onition. It is rport tht inignous ttl of th ountry r lso mor iss rsistnt n pl to thriv wll in hrsh onition (Mji t l. 1992). Morovr, mjority of th poor frmrs r mor hitut to mng thir inignous stok y following low input mngmnt systm. Thrfor, upgr Brhmn ross ull my mor ptl to our gro-limti onition for f proution. Consiring th ov fts, th prsnt stuy ws unrtkn to slt Brhmn rossr ring ulls from gr-1 popultion tking th rgionl influn into ount n to stimt th sltion iffrntil n sltion intnsity to prit th gnti gin for th nxt gnrtion. Mtrils n mthos Exprimntl nimls A f r vlopmnt progrm ntitl Bf r improvmnt projt is running in iffrnt slt rs of Bnglsh y th Govrnmnt of th Popls Rpuli of Bnglsh unr th Dprtmnt of Livstok Srvis (DLS). In this projt, smn of Brhmn ulls ws import from th USA in 2009 (Bull ID BR40, BR524, BR522, BR525, 14BR41 n BR10) This import smn ws us to insmint inignous ows to otin gr progny in th slt rgions. With th ollortion of DLS, Fulty of Animl Husnry, Bnglsh Agriulturl Univrsity (BAU) hs strt su-projt ntitl Innovtiv rsrh on livstok n poultry to inrs milk, mt n gg proution in Bnglsh. In th prsnt rsrh, 4 (four) Brhmn rossr (gr) ring ulls hv n slt from thos rossr popultion-1 (F1). Bulls hv n slt on th sis of vrg ily gin, physil pprn n liio. Th slt ulls r now ing rring t th rtifiil insmintion ntr of BAU. Collt smn of thos ulls r ing us to insmint inignous ow to improv f proution potntilitis. Popultion siz n t strutur Inignous ows wr insmint with th Brhmn smn in th slt rs of Bnglsh n totl of 233 rossr (gr) lvs in whih 127 of mls n 106 of fmls wr orn. Th nm of th slt rs n th popultion siz r prsnt in Tl 1. Tl 1. Slt rs n rossr popultion Ar No. lvs Ar No. lvs CCBDF 63 Tungipr 08 Chirirnor 20 Kusti 10 Pirgnj 29 Jssor 08 Shrikni 08 Moulovizr 12 Blkuhi 09 Chrght 08 Chouhli 14 Thkurgon 44 Th iffrnt informtion lik rtifiil insmintion t, lving t, irth wight, wning wight, yrling wight t. wr ollt from th hrook mintin t th Upzil Livstok Offi with th hlp of ppoint niml rorrs in th rsptiv slt rs. Dt ntry, rliility tst n sorting Aftr omplting th pr-tultion tsk of th ollt t, rors of rossr prognis wr ntr in Exl shts of Mirosoft offi omputr progrm. Th ollt t wr tst for thir norml istriution using Sttistil Anlysis Systm (SAS, Vrsion 6.12) mtho n norml t wr omitt from th t shts. Sttistil Anlysis Bfor slting ring ulls, ffts of iffrnt rs n sx of lvs on rossr 61

3 Brhmn rossr ull sltion prformn wr stimt. Th sort t wr nlyz to otin ANOVA y Gnrliz Linr Mol using Sttistil Anlysis Systm (SAS, Vrsion 6.12) omputr pkg. Lst Signifint Diffrn (LSD) tst ws prform to sprt mn vlus. Birth wight Rsults Th mn vlus long with stnr vitions (SD) of irth wight of Brhmn rossr lvs r shown in Tl 2. Th highst irth wight of 26.12±8.26kg ws osrv in Tungipr n th lowst on of 16.50±4.17kg in Srikni. Rltivly similr irth wight ws otin from Chirirnr, Kusti, Jssor, Blkuhi, Chrght n Pirgnj, n rng from 20.60± ±3.41kg. Th lvs from Thkurgon n Chouhli wr low in irth wight (17.81±2.13 n 19.44±6.36 kg, rsptivly). Tl 2. Mn±SD of irth wight (kg) of rossr lvs Ar Pool Ml Fml CCBDF ±4.57 (63) ±5.21 (37) ±3.27 (26) Chirirnr ±1.69 (20) ±1.43 (14) ±2.33 (6) Pirgnj ±3.41 (29) ±3.57 (17) ±3.08 (12) Srikni ±4.17 (8) ±7.23 (4) ±4.99 (4) Blkuhi ±5.60 (9) ±1.20 (4) ±5.43 (8) Chouhli ±6.36 (14) ±7.23 (6) ±6.00 (8) Tungipr ±8.26 (8) ±10.20 (6) ±3.51 (2) Kusti ±3.65 (10) ±9.19 (4) ±2.06 (8) Jssor ±21.25 (8) ±3.12(7) ±0.70 (4) Moulovi Bzr ±7.73 (12) ±8.24 (8) ±6.27 (4) Chrght ±5.65 (8) ±6.04 (6) ±6.36 (2) Thkurgon ±2.13 (44) ±2.20 (19) ±2.06 (25) CCBDF, Cntrl Cttl Bring n Diry Frm; Mns with iffrnt suprsript in th sm olumn iffr signifintly (p<0.001); Figurs in th prnthss init th numr of osrvtion Consiring th sx, mn vlus long with thir stnr vitions of irth wight of ml n fml lvs r lso shown in Tl 2. Th highst irth wight of ml lvs ws 27.80±10.20 kg in Tungipr n lowst on ws in Thkurgon (18.26±2.20 kg). Similrly, th highst n lowst irth wight for fml lvs ws 23.33±3.31 kg n 17.48±2.06 kg in Tungipr n Thkurgon, rsptivly. Th vrg irth wight of Brhmn ross ignoring sx ws 21.38±4.98 kg, n mn for ml n fml lvs wr 22.25±5.60 n 20.33±3.88 Kg, rsptivly (Tl 5). Tl 3. Mn±SD of yrling wight (kg) of rossr lvs Ar Pool Ml Fml CCBDF ±47.56 (53) ±48.73 (30) ±44.13 (23) Chirirnr ± ± ±21.99 (20) (14) (6) Pirgnj ± ± ±36.95 (29) (17) (12) Srikni ± ± ±30.41 (8) (4) (4) Blkuhi ± ± ± (9) (1) (8) Chouhli ± ± ±76.50 (10) (40 (6) Tungipr ± ± ± (8) (5) (3) Kusti ± ± ±30.89 (10) (2) (8) Jssor ± ± ±44.15 (8) (7) (1) Moulovi- Bzr ± ± ±46.20 (10) (7) (3) Chrght ± ± ±1.76 (5) (3) (2) Thkurgon ± ± ±46.66 (40) (18) (22) CCBDF, Cntrl Cttl Bring n Diry Frm; Mns with iffrnt suprsript in th sm olumn iffr signifintly (p<0.001); Figurs in th prnthsis init th numr of osrvtion 62

4 Hqu t l. (2012) Bng. J. Anim. Si. 41 (2): Tl 4. Mn±SD of vrg ily gin (g) of rossr lvs Ar Pool Ml Fml CCBDF ± ± ± (53) (30) (23) Chirirnr ± ± ±59.02 (20) (14) (6) Pirgnj ± ± (29) (17) (12) Srikni ± ± ±71.91 (8) (4) (4) Blkuhi ± ± ± (9) (1) (8) Chouhli ± ± ± (10) (4) (6) Tungipr ± ± ± (8) (5) (3) Kusti ± ± ±86.36 (10) (2) (8) Jssor ± ± ± (8) (7) (1) Moulovi- Bzr ± ± ± (10) (7) (3) Chrght ± ± ±12.62 (5) (3) (2) Thkurgon ± ± ± (40) (18) (22) CCBDF, Cntrl Cttl Bring n Diry Frm; Mns with iffrnt suprsript in th sm olumn iffr signifintly (p<0.001); Figurs in th prnthsis init th numr of osrvtion ±46.66 kg in Chrght n Jssor, rsptivly. Avrg ily gin Mn vlus of vrg ily gin of Brhmn rossr lvs r prsnt in Tl 4. Using pool t, th highst gin of ± g/y ws foun in Chrght n th lowst on of ±141.94g in Thkurgon. Mximum of ±82.68 g vrg ily gin for ml lvs ws otin in Chrght r, whil minimum of ± g in Jssor. Howvr, th mn yrling wight of Brhmn ross ml n fml ws ±73.21 n ± kg, rsptivly with pool vlu of ±72.74 kg (Tl 5). Tl 5. Mn±SD of irth wight, vrg ily gin n yrling wight of ll lvs Trit Ml Fml Pool BWT (kg) ±5.60 (127) ±3.88 (106) ±4.98 (233) ADG (g/) ±193.7 (113) ±184.5 (97) ±192.9 (210) YWT (kg) ±73.21 (113) ±69.04 (97) ±72.74 (210) BWT, irth Wight; ADG, vrg ily gin; YWT, yrling wight; Mns with iffrnt suprsript in th sm olumn iffr signifintly (p<0.001) Th vrg ily gin of Brhmn ross ml n fml lvs wr ±193.7 n ±184.52g, rsptivly n popultion mn ws ±192.95g (Tl 5). Brhmn ross popultion 1 µ 1 = 547 g x (slt niml) = 731 g Yrling wight Th yrling wight of ml, fml n pool t of Brhmn rossr lvs r shown in Tl 3. Ar hs signifint fft (p<0.05) on yrling wight of lvs. Th highst yrling wight of ±39.75 kg ws osrv in Chrght n th lowst on of ±52.74 kg in Thkurgon. Comprtivly, lmost similr yrling wight ws foun in CCBDF, Chirirnr, Kusti n Pirgonj n rng from ±47.56 to ±53.22 kg. Th highst yrling wight of ml ws ±34.60 kg in Chrght n lowst on of ±43.54 kg in Jssor. Alik th highst n lowst yrling wight for fml ws ±1.76 kg n Brhmn ross popultion 2 SD =184 g Expt rspons Figur 1. Expt rspons on vrg ily gin to sltion from popultion 1 to popultion 2 (Popultion siz = 233 (Ml = 127; Fml = 106) µ 2 Slt nimls 63

5 Brhmn rossr ull sltion Four young ulls wr slt from totl of 113 ml lvs of popultion 1 (F 1 ) from slt rs s on th rsult for vrg ily gin with onsirtion of physil pprn n liio. Th xpt rspons on vrg ily gin to sltion of ulls from popultion 1 to popultion 2 is prsnt in Figur 1. Birth wight Disussion Th rsults of highr irth wight (26.12±8.26 Kg) in Tungipr n lowr on (16.50±4.17kg) in Srikni (Tl 2) rvl tht th rs h signifint (p<0.001) influn on irth wight of lvs. Th vlus on irth wight of ml n fml lvs lso iffr signifintly (p<0.001). Th mximum irth wight for ml lvs ws 27.80±10.20 kg in Tungipr n minimum of 18.26±2.20kg in Thkurgon (Tl 2). Similrly, th mximum irth wight of 23.33±3.51 kg for fml lvs ws lso in Tungipr n minimum of 17.48±2.06 Kg in Thkurgon (Tl 2). Th irth wight of Brhmn ross ml n fml lvs vrg 21.38±4.98 kg (Tl 5). This vlu ws omprl to th vlu (25.3 kg) osrv y Croktt t l. (1978). Snrs t l. (2005) osrv kg irth wight of F 1 Gry Brhmn lvs. Hollowy t l. (2005) rport kg irth wight of Brhmn n Angus rosss. All stimt vlus grtly iffr with th vlus of th prsnt finings. This vrition ws proly u to us of Brhmn ulls for rossing with th ms tht wr gntilly suprior to ntiv ttl. On mor, nvironmnt lso might hv fft th rsult. Th vrg irth wight for ml n fml lvs of 22.25±5.60Kg n 20.33±3.88Kg, rsptivly (Tl 5) ws show tht th irth wight of ml lvs ws 1.93 kg, whih ws highr thn th fml on. Ths vlus losly rlt to th vlus of 2.1 kg n 2.00 kg s osrv y Vrgs t l. (1999) n Kith t l. (2010), rsptivly. Bhuiyn (1999) got omprtivly highr irth wight for ml n fml (27.50±0.79 n 23.05±0.32 kg, rsptivly) thn th rsults of th prsnt xprimnt whil working on Frisin n Frisin x Lol grs of ttl. Hirook n Bhuiyn (1995) stlish mn irth wight for ml n fml of lol n Frisin x Lol grs 13.44±1.782 kg n 17.28±0.436 kg, rsptivly. Hi t l. (2003) n Ry (2009) osrv vrg irth wight of 16.7±0.48 n kg, rsptivly for R Chittgong ttl. All of thir finings wr lowr thn t otin in th prsnt stuy. Hoqu t l. (1999) n Uo t l. (1990) otin th irth wight of 17.92±3.47 n 15.6±.02 kg, rsptivly in Pn lol ttl. Hossin n Routlg (1982) hv lso rport vrg irth wight of 16.37±0.20 kg in Pn lol. All of thir givn vlus wr lso lowr thn th prsnt work. It ws osrv tht Brhmn with lol ross lvs wr highr in vrg irth wight thn th lol or lol ross with improv gnotyps. This might u to ttr growth potntilitis of Brhmn ttl thn othrs. Th sx h n influn on irth wight of lvs n mjority of th ss mls wr hvir thn th fml ons, s woul xpt. Yrling wight Mximum vrg yrling wight ±39.75 Kg ws osrv in Chrght n minimum ±52.74 kg in Thkurgon (Tl 3). It ws shown tht rs h lso highly signifint (p<0.001) influn on yrling wight of lvs. In spit of th highr irth in Tungipr th yrling wight ws highr in Chrght. Similrly, mort irth wight ws otin in Jssor, ut th yrling wight (156.13±41.15 kg) ws lowr thn th vlus otin from othr rs. Aoringly, with som xption, it ws osrv tht highr irth wight rsult grtr yrling wight. Th vlus on yrling wight of ml n fml lvs from iffrnt rs iffr signifintly (p<0.001). Among th ml lvs, th highst vrg yrling wight ws ±34.6 kg in Chrght n lowst on of ±43.54 kg in Jssor. In fml lvs, th highst vrg yrling wight of ±1.76 kg ws lso in Chrght n lowst on of ±46.66 kg in Thkurgon r. Th mn yrling wight of Brhmn ross lvs for ml n fml ws ±73.21 n ±69.04 kg, rsptivly with pool vlu of ±72.74 kg (Tl 5). Ars n sx lso signifintly (p<0.001) fft on yrling wight. Snrs t l. (2005) work on two (Angus n Brhmn) F 1 ross niml n foun 271 n 270 kg yrling wight in R Brhmn n Gry Brhmn rosss, rsptivly whih wr highr thn th Angus rosss ws 231kg, n oviously suprior thn prsnt 64

6 Hqu t l. (2012) Bng. J. Anim. Si. 41 (2): finings. All of ths vlus grtly iffr from th vlus of prsnt xprimnt. Hi (2011) osrv th mn yrling wight of R Chittgong ttl for ml n fml lvs s 70.6±0.70 n 64.6±6.6 kg, rsptivly, n vrg of ml n fml lvs ws 67.6±6.2 kg. Ry t l. (2009) lso work on th sm ttl n wr otin 76.2±4.0 n 73.2±3.3 kg yrling wight for ml n fml, rsptivly. Gur t l. (2003) rport th mn yrling wight for Gir ml n fml ws 138.5±0.52 n 135.7±5.7 Kg, rsptivly n ovrll mn yrling wight ws 137.0±4.9 kg. Th yrling wight of Brhmn ross lvs ws lrgr rsmling th finings from iffrnt workrs stt ov. Avrg ily gin It ws osrv tht th rs h highly signifint (p<0.001) influn on vrg ily gin of lvs. Dspit th highr irth wight in Tungipr, th vrg ily gin ws highr in Chrght. Similrly, mort irth wight ws otin in Jssor ut th rt of gin (369.56± g/) ws lowr thn th vlus from iffrnt rs. In viw of tht, most of th ss highr th irth wight vntully grtr in vrg ily gin. Highst vrg ily gin for ml lvs ws otin in Chrght ( ±82.68 g), whil lowst in Jssor (357.31± g). Similrly, highst vrg ily gin for fml lvs ws otin in Chrght ( ±12.62 g) n lowst in Thkurgon (334.78± g) r. Th popultion mn of vrg ily gin of Brhmn rosss ws ±192.95g (Tl 5). Ars n sx h highly signifint (P<0.001) fft on vrg ily gin for lvs. Colitz t l. (1972) n Kith t l. (2010) rport thir xprimntl vlus of vrg ily gin s 670 n 849g, rsptivly. All of ths vlus wr istintly highr thn th vlu otin in th prsnt stuy. Hi t l. (2003) n Hossin n Routlg (1982) foun th ily gin s 168 n 190 g, rsptivly, whih wr lowr thn th prsnt xprimnt. Hi (2011) stimt th pr-wning n post-wning mn wight gin in R Chittgong lvs of 157.5±15.9 n 176.9±.24.3 g/, rsptivly. All of ths rsults wr notily lowr thn th prsnt work. This ws proly u to gnotyps n nvironmntl vritions, n vintly prov tht Brhmn ross lvs r ttr thn th lvs from th inignous typs/vritis. Th ml lvs wr hvir thn th fml ons, n thr ws istint positiv fft of irth wight on vrg ily gin s wll s on yrling wight of lvs. Highr th irth wight, grtr th yrling wight long with ily wight gin. Ars h signifint influn on vrg ily gin of lvs. Sltion iffrntil for givn trit omprs th vrg prformn of slt iniviuls to th vrg of th popultion from whih thy wr slt. Mn vlu for vrg ily gin of ml lvs of th popultion ws foun to 547 g (Tl 5), whil th slt nimls mn ws 731 g. Thus, th stimt sltion iffrntil on vrg ily gin of slt ring ulls from popultion 1 ws foun to 183 g (Figur 1) with sltion intnsity of If ths ulls us proprly for insminting th ows of popultion 1, th mn of popultion 2 might hv n inrs. Th rsulting xpt rspons or gnti gin is shown in Figur 1. Conlusion Th irth wight, yrling wight n vrg ily gin of Brhmn ross lvs wr highr thn tht of inignous n othr rossr lvs in Bnglsh s wll s mjor prt of th worl. With som xption, highr th irth wight vntully grtr in vrg ily gin n yrling wight, lthough mngmnt systm of lvs might hv fft on ths trits. Th growth prformn long with stimt sltion intnsity n sltion iffrntil for vrg ily gin of Brhmn rossr ring ulls init tht th slt ulls my rt n xploittion opportunity to improv inignous ttl for f purposs in Bnglsh s wll s su-tropil rgions. As th Brhmn ross ttl r nw introution to Bnglsh, furthr in pth stuy is n to xplor mor informtion from r vlopmnt pprohs. Rfrns Bhuiyn MSA (1999). Estimtion of gnti prmtrs for som onomi trits of iry ttl. MS Thsis, Dprtmnt of Animl Bring n Gntis, Bng. Agri. Univ., Mymnsingh. Colitz PJ n Kllwy RC (1972). Th fft of it n ht strss on f intk, growth, n nitrogn mtolism in 65

7 Brhmn rossr ull sltion Frisin, F1 Brhmn x Frisin, n Brhmn hifrs. Aus. J. Agri. Rs. 23: Croktt JR, Kogr M n Frnk DE (1978). Rottionl Crossring of Bf Cttl: Prwning Trits y Gnrtion. J. Anim. Si. 46: Gur OK, Kushik SN n Grg RC (2003). Th Gir ttl r of Ini, Chrtristis n prsnt sttus. Anim. Gn. Rsour. Inform. 33: Hi MA, (2011). Anlysis of R Chittgong Cttl Gnotyp in Nulus Bring Hr, Ph.D issrttion, Dprtmnt of Animl Bring & Gntis, Bng. Agri. Univ., Mymnsingh. Hi MA, Bhuiyn AKFH, Bhuiyn MSA n Khn AA (2003). Prformn of R Chittgong ttl in Bnglsh Agriulturl Univrsity iry frm. Bng. J. Anim. Si. 32: Hirook H n Bhuiyn AKFH (1995). Aitiv n htrosis ffts on milk yil n irth wight from rossring xprimnts twn Holstin n Lol r in Bnglsh. Asin-Aus. J. Anim. Si. 8: Hoqu MA, Amin MR n Hussn MS (1999). Diry potntil of Pn ows n rossrs with Shiwl n Frisin n within n twn r sir fft. Asin-Aus. J. Anim. Si. 12: Hossin MA n Routlg SF (1982). Prformn of rossr n lol ttl unr villg onitions in Pn istrit of Bnglsh. Livst. Pro. Si Kith E Grgory, Grl Smith M, Cuniff LV, Koh RM n Lstr DB (2010). Chrtriztion of iologil typs of ttl-yl irth n wning trits. J. Anim. Si. 48: Mji MA, Nhr TN, n Jlil MA (1992). Bring for ttl improvmnt in Bnglsh. Pro. 4th Nt. Conf., Bng. Anim. Hus. Asso. P Ry T, Bhuyin AKFH, Hi MA n Hossin MS (2009). Phnotypi n gnti prmtrs on growth trits of R Chittgong Cttl of Bnglsh. J. Bng. Agri. Univ. 7: Snrs JO, Rily DG, Pshl J n Lunt DK (2005). Evlution of th F1 Crosss of Fiv Bos inius Brs With Hrfor for Birth, Growth, Crss, Cow Proutivity, n Longvity Chrtristis Txs Agriulturl Exprimnt Sttion n Txs A & M Univrsity, Collg Sttion. P SAS (1998). Usr s gui. SAS Institut In. Vrsion Cry. Unit Stts of Amri. Uo HMG, Hrmns C n Dwoo F (1990). Comprison of two ttl proution systm in Pn istrit, Bnglsh. Tropil Anim. Hlth Pro., 22: Vrgs CA, Olson TA, Chs CCJR, Hmmon AC n Elzo MA (1999). Influn of frm siz n oy onition sor on prformn of Brhmn ttl. J. Anim. Si. 77: