Mapping the Naked Neck (NA) and Polydactyly (PO) mutants of the chicken with microsatellite molecular markers
14
pages
English
Documents
2000
Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus
Découvre YouScribe en t'inscrivant gratuitement
Découvre YouScribe en t'inscrivant gratuitement
14
pages
English
Documents
2000
Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus
The bulked segregant analysis methodology has been used to map, with microsatellite markers, two morphological mutations in the chicken: polydactyly ( PO ) and naked neck ( NA ). These autosomal mutations show partial dominance for NA , and dominance with incomplete penetrance for PO . They were mapped previously to different linkage groups of the classical map, PO to the linkage group IV and NA being linked to the erythrocyte antigen CPPP . An informative family of 70 offspring was produced by mating a sire, heterozygous for each of the mutations, to 7 dams homozygous recessive for each locus. Three DNA pools were prepared, pool PO included 20 chicks exhibiting at least one extra-toe, pool NA included 20 non-polydactyly chicks showing the typical phenotype associated with heterozygosity for the naked neck mutation, and pool NP included 20 chicks exhibiting neither of the mutant phenotypes. Typings were done on an ABI-373 automatic sequencer with 147 microsatellite markers covering most of the genome. An unbalanced distribution of sire marker alleles were detected between pool PO , and pools NA and NP , for two markers of chromosome 2p, MCW0082 and MCW0247. A linkage analysis taking into account the incomplete penetrance of polydactyly (80%) was performed with additional markers of this region and showed that the closest marker to the PO locus was MCW0071 (5 cM, lod score = 9). MCW0071 lies within the engrailed gene EN 2 in the chicken. In the mouse, the homologous gene maps on chromosome 5, close to the hemimelic extra-toes mutation Hx . In the case of the NA locus, markers of chromosome 3 were selected because CPPP was mapped on this chromosome. Analysis of individual typings showed a linkage of 5.7 cM (lod score = 13) between the NA locus and ADL0237 in the distal region of chromosome 3q. These results contribute to connecting the former classical map to the molecular genetic map of the chicken, and open the way to the identification of the molecular nature of two developmental mutations of the chicken that are known to occur in many breeds of chickens.
Voir
Fdmds- Rdk- Dunk- 21 ’1///( 62z75 ° b HMQ@+ DCO Rbhdmbdr
62 Nqhfhm‘k ‘qshbkd L‘oohmf sgd M‘jdc Mdbj ’ M@ ( ‘mc Onkxc‘bsxkx ’ ON ( lts‘msr ne sgd bghbjdm vhsg lhbqnr‘sdkkhsd lnkdbtk‘q l‘qjdqr
Eqd´c´dqhptdO HSDK ‘ +Q´dfhrA DQF´D ‘ a +Fd´q‘qcB NPTDQDKKD a + Qhbg‘qc O-L-@- B QNNHIL@MR b + L‘qshdm @-L- F QNDMDM b + @k‘hm U HFM@K ‘ +Lhbgd`kdS HWHDQ ,A NHBG@QC a ∗ ‘ K‘anq‘snhqdcdf´dm´dshptdbdkktk‘hqd+C´do‘qsdldmscdfd´md´shptd‘mhl‘kd+Hmrshsts m‘shnm‘k cd k‘ qdbgdqbgd ‘fqnmnlhptd+ 20215 B‘rs‘mds,Snknr‘m Bdcdw+ Eq‘mbd a K‘anq‘snhqdcdfd´md´shptde‘bsnqhdkkd+C´do‘qsdldmscdfd´m´dshptd‘mhl‘kd+Hmrshsts b mC‘sdhon‘mq‘sklcddmsk‘neqd@bgmdhqlbg‘kdA‘qfdqdncmhnmlf+hpVtd+67241Intx,dm,Inr‘rBdcdw+Eq‘mbddr ‘fdmhmfdm Hmrshstsd ne @mhl‘k Rbhdmb ’VH@R(+ V‘fdmhmfdm @fqhbtkstq‘k Tmhudqrhsx+ Onrsanw 227+ 56// @G V‘fdmhmfdm+ Sgd Mdsgdqk‘mcr ’Qdbdhudc 05 @tftrs 0888: ‘bbdosdc 14 Mnudladq 0888( @arsq‘bs z Sgd atkjdc rdfqdf‘ms ‘m‘kxrhr ldsgncnknfx g‘r addm trdc sn l‘o+ vhsg lhbqnr‘sdkkhsd l‘qjdqr+ svn lnqognknfhb‘k lts‘shnmr hm sgd bghbjdm9 onkxc‘bsxkx ’ O N ( ‘mc m‘jdc mdbj ’ M ∂ (- Sgdrd ‘tsnrnl‘k lts‘shnmr rgnv o‘qsh‘k cnlhm‘mbd enq M ∂ + ‘mc cnlhm‘mbd vhsg hmbnlokdsd odmdsq‘mbd enq O N - Sgdx vdqd l‘oodc oqduhntrkx sn chffdqdms khmj‘fd fqntor ne sgd bk‘rrhb‘k l‘o+ O N sn sgd khmj‘fd fqnto HU ‘mc M ∂ adhmf khmjdc sn sgd dqxsgqnbxsd ‘mshfdm BOOO - @m hmenql‘shud e‘lhkx ne 6/ nff, roqhmf v‘r oqnctbdc ax l‘shmf ‘ rhqd+ gdsdqnyxfntr enq d‘bg ne sgd lts‘shnmr+ sn 6 c‘lr gnlnyxfntr qdbdrrhud enq d‘bg knbtr- Sgqdd CM@ onnkr vdqd oqdo‘qdc+ onnk O N hmbktcdc 1/ bghbjr dwghahshmf ‘s kd‘rs nmd dwsq‘,snd+ onnk M ∂ hmbktcdc 1/ mnm, onkxc‘bsxkx bghbjr rgnvhmf sgd sxohb‘k ogdmnsxod ‘rrnbh‘sdc vhsg gdsdqnyxfnrhsx enq sgd m‘jdc mdbj lts‘shnm+ ‘mc onnk MO hmbktcdc 1/ bghbjr dwghahshmf mdhsgdq ne sgd lts‘ms ogdmnsxodr- Sxohmfr vdqd cnmd nm ‘m @AH,262 ‘tsnl‘shb rdptdmbdq vhsg 036 lhbqnr‘sdkkhsd l‘qjdqr bnudqhmf lnrs ne sgd fdmnld- @m tma‘k‘mbdc chrsqhatshnm ne rhqd l‘qjdq ‘kkdkdr vdqd cdsdbsdc adsvddm onnk O N + ‘mc onnkr M ∂ ‘mc M O + enq svn l‘qjdqr ne bgqnlnrnld 1o+ LBV//71 ‘mc LBV/136- @ khmj‘fd ‘m‘kxrhr s‘jhmf hmsn ‘bbntms sgd hmbnlokdsd odmdsq‘mbd ne onkxc‘bsxkx ’7/$( v‘r odqenqldc vhsg ‘cchshnm‘k l‘qjdqr ne sghr qdfhnm ‘mc rgnvdc sg‘s sgd bknrdrs l‘qjdq sn sgd O N knbtr v‘r LBV//60 ’4 bL+ knc rbnqd ¡ 8(- LBV//60 khdr vhsghm sgd dmfq‘hkdc fdmd DM 1 hm sgd bghbjdm- Hm sgd lntrd+ sgd gnlnknfntr fdmd l‘or nm bgqnlnrnld 4+ bknrd ∗ Bnqqdronmcdmbd ‘mc qdoqhmsr D,l‘hk9 anhbg‘qc?intx-hmq‘-eq
