Umuntu waqala ukondla izilwane zasendle ukuthola umthombo ozinzile wokudla eminyakeni eyizinkulungwane ezingu-10-12 ezedlule. Ngisho nalapho eqala ukukhetha abantu abanezimfanelo ezidingekayo. Ekuqaleni, lezi zimfanelo zahlukaniswa ngaphandle kokuqonda, kodwa ngokuhamba kwesikhathi zaqala ukukhethwa ngezindlela ezikhethekile. Cabangela ukuthi yiziphi izinhlobo, izindlela, izimpawu nezinkomba ezisetshenziswa ekukhethweni nasekukhethweni kwemfuyo yezolimo.
Iyini ukukhethwa nokukhethwa kwezilwane zasepulazini
Ukuze kudalwe izinhlobo ezintsha kanye nokuthuthukiswa kwezinto ezikhona ezakhiweni ezikhiqizayo, ukuphila, ukuqina kanye nezinye izimfanelo ezifiselekayo zezilwane ezifuywayo, ukukhethwa nokukhethwa kwabantu ngabanye besizwe kuyasetshenziswa.
Ekuzaliseni umsebenzi, qalisa ukukhetha abesilisa nabesifazane ngokusebenza okuhle kakhulu kokukhiqiza. Khona-ke phakathi kwezilwane ezikhethiwe ukukhethwa kwababili bomzali ukuze uthole inzalo enezici ezinhle kakhulu. 
Amafomu okukhethwa
Omunye uCharles Darwin uphawule ukuthi ukwakheka kwezinhlobo ezintsha zezilwane nokuthuthukiswa kwezikhona kubangelwa ukukhethwa kwemvelo nokufakelwa.
Uyazi? Umsunguli wemvelo odumile uCharles Darwin wayengenalo imfundo yezinto eziphilayo, wayezimisele ukuba umpristi noma udokotela. Wayezibandakanya ekuzifundiseni, futhi ubaba uRobert Darwin, udokotela ocebile futhi ocebile, wayevame ukuhlambalaza indodana yakhe ngenxa yokuthakazelisa izilwane futhi akazange acabange ukuthi lo msebenzi omkhulu.Ngokukhethwa kwemvelo, siyaqonda ukusinda nokulondolozwa kwezinhlobo ezinjalo, okuthi, ngenxa yokushintsha kwabo ngabanye, zivumelane kangcono nezimo zendawo yangaphandle. Ngakho-ke, ngokusebenzisa ukusinda nokukhiqizwa kwabantu abathintekayo kakhulu, ukuguquka kwesilwane sasendle kanye nezinhlobo zezitshalo kwenzeka.
Ukukhetha okukhethwa ngumuntu kwenziwa ngumuntu ngokukhetha isizwe nokulondoloza ukuzalanisa labo abanamakhono afiselekayo.
Ihhashi liye lashintsha kanjani ngenxa yokukhethwa kwemvelo
Indalo
Lena yindlela enkulu yokuziphendukela kwemvelo, ngenxa yalokho okuphilayo okuphilayo okusinda khona, okujwayele ukujwayela indawo yokuhlala ekhona. Yisizathu kuphela sokuthi zivumelane nezinguquko emvelweni wemvelo, ngoba ngenxa yalokho ukuguqulwa kwezinto ezishintshayo kunomthelela kulokhu. Kwakubaluleke kakhulu lapho lo muntu efuywayo yizilwane zasendle, kodwa okwenziwe izilwane zanamuhla akuseyona efanelekile.
Funda ukuthi ungakhetha kanjani onogwaja, goose, izinkukhu zokuzalanisa.
I-Artificial
Lokhu kukhethwa ngabantu bezilwane abanezimfanelo ezibalulekile kwezolimo, ukuthola inzalo evela kuzo nezakhiwo ezidingekayo. Kubizwa nangokuthi ukhetho lukazwelonke, futhi ngenxa yalokho, manje kunenani elikhulu lezinhlobo ezahlukene zezilwane ezifuywayo.
Kunezinhlobo ezahlukene zokukhethwa okufakelwayo. 
Izinhlobonhlobo zezinja zezinja
Okukhulu
Lokhu kukhethwa kwenziwa ngokuvumelana nezici ezifuywayo zezilwane zasemapulazini ezithandekayo kumuntu - lezi zimfanelo ezikhiqizayo, ingaphandle, amandla, umthethosisekelo, amakhono okuzala, nabanye. Izimpawu zokuqala nezakhi zezinzalo azicatshangelwa.
Enye yezinhlobo zokukhethwa kwamandla yiqembu, lapho abantu abakhethiwe behlukaniswe ngamaqembu kuye ngokuthi injongo yokukhiqiza okuqhubekayo.
Ngamunye
Ucabangela i-genotype yezilwane ezikhethiwe. Uma kucatshangwa ukuthi imvelaphi yabo, ikhwalithi yenzalo, izihlobo zayo, amarekhodi e-pedigree agcinwa.
Ukukhethwa komuntu ngamunye kuthathwa njengokukhiqiza ukwedlula ukukhethwa kokukhulu futhi ngokuvamile kuvame ukusetshenziswa emsebenzini wokuzalanisa.
Funda ukuphatha amahhashi, amajuba, izinkomo.
Akuqondile
Ngokusekelwe emthethweni wokulungiswa, okusho ukuthi ushintsho kwezinye izibonakaliso kudonsa ushintsho kwabanye. Ukukhethwa okungaqondile kubonakala ngezibonakaliso ezingenasithakazelo emfuyweni yezolimo. Kodwa lezi zimpawu zikhomba ukuthi kukhona ezinye, izimfanelo ezibaluleke kakhulu esilwaneni esikhethiwe. Isibonelo, abakhiqizi bezinkunzi bahlolwe ukuba khona kwezakhi zofuzo ezingalungile. 
Ukuzinza
Iqondiswa ekulondolozweni nasekugxilweni emfuyweni yezilwane zezimfanelo, eziwusizo ekuphatheni izilwane. Uma kunqatshelwe abantu abaye baphambuka emithethweni emisiwe. Kubalulekile ekukhiqizeni izilwane ezimbonini, lapho umhlambi wezinkomo kufanele ube uhlobo olufanayo ukuze ungaphazamise inqubo yezobuchwepheshe. Isibonelo, izinkabi ziyanqatshwa nge-udder kanye nezinsipho ezingavumeli ukuthi imishini yokwazisa ifakwe kubo.
Funda indlela yokugcina umhlambi wezinkukhu zabazali.
Izimpawu nezinkomba zokukhethwa
Ukukhethwa kwenziwa ngezizathu ezihlukahlukene kanye nezinkomba. Izimpawu zibalulekile kusukela ekubukeni kwekhwalithi yezolimo, ngenxa yokuthi yiziphi izilwane ezifakiwe (ukukhiqizwa ubisi, inyama, ikhwalithi yeboya, ubomvu nabanye).
Izinkomba zihlobene nezici zokulinganisa lapho izibonakaliso ezidingekayo zithuthuka (isisindo esibukhoma, ukukhiqiza inyama, inani lemali kanye nokuqukethwe kwamafutha ebisi, ubude beboya, njll).
Izinhloso zokukhethwa zingase zihlanganise inombolo ehlukile yezibonakaliso nezinkomba. Ukukhethwa yinombolo enkulu yezibonakaliso akulula futhi akusebenzi ngaso sonke isikhathi. Uma ukhetha inombolo encane yazo, ungalahlekelwa ezinye izimfanelo ezibalulekile, ukulahlekelwa okuzolimaza umkhiqizo wezilwane. 
Kungcono ukwenza ukukhetha ngesisekelo sezinto ezithinta izici zokusebenza, umthethosisekelo kanye nempilo yabantu abakhethiwe.
Kubalulekile! Akudingekile ngesikhathi kukhethwa izilwane kakhulu ukubhekana nezinkomba ezikhiqizayo. Umphumela wokukhethwa eHolland wezinkomo ngesilinganiso sobisi kwaba ukwehluleka komthethosisekelo wezinkomo kanye nokuqukethwe okuphansi kwamanoni ebisi.
Ukuhlola nokukhethwa kwezilwane ngomthethosisekelo, ngaphandle nesisindo somzimba
Sekuyisikhathi eside ababelethi beqaphela ukuthi kukhona ubuhlobo phakathi kwezici zangaphandle zezilwane nezimfanelo zabo, ezisebenzisekayo kwezolimo. Ngokusekelwe kulokhu, izidingo ezithile zokusebenza, umthethosisekelo, ingaphandle nesisindo somzimba zenziwa.
Ukwengezwa kwesilwane kuthinta ukwabiwa kwezinhlobo ngendlela yokusetshenziswa: inyama, inyama-ubisi kanye nobisi, ezinkomeni; inyama, inyama nesikhumba, futhi phansi ezinogwaja, njll.
Phakathi nokukhethwa kwezinkomo zohlobo lwezimbuzi, ukunakekelwa kukhokhwa izibonakaliso, ubukhulu kanye nokuma kwesibindi nezinsipho, imingcele ethinta izitho zokuphefumula nomsebenzi wegciwane lokugaya (ukujula kwesifuba, ukuthuthukiswa kwe-peritoneum, njll).
Ukuze izinkomo zenkomo zenkomo, abantu abathuthukisiwe abanezici ezikhethiwe ezizuzisa kakhulu ukukhiqiza inyama ephakeme (imisipha ethuthukile, ubujamo obubanzi nobubanzi, njll).
Izilwane ezineziphambeko ezinciphisa ukukhiqiza (ukuncipha kwe-pelvis, ukwehlisa emuva, izitho ezibuthakathaka, njll) zinqatshiwe. Ukukhethwa ngokusho komthethosisekelo, ingaphandle nesisindo somzimba kuhloswe ukuqinisa nokuhlanganisa phakathi kwemfuyo yezilwane zasemapulazini ukuhlanganisa okuqinile nokulinganisa, ubungako obufunayo.
Zijwayele ngezinhlobo ezivamile zenyama, ubisi, inyama nezinkomo zobisi; ukugibela namahhashi anzima; ubomvu nenyama onogwaja; izimbuzi; i-merino, i-milk, fat-tailed, inyama yezimvu; izingulube.
Ngokukhiqiza
Lolu hlobo lokukhetha lubalulekile ekulimeni kwezilwane. Ukukhiqizwa kunqunywa yizici ezilinganiselwe nezokufaneleka kwemikhiqizo etholakale kumuntu ngamunye esikhathini esithile. Ngolunye uhlobo lwezilwane zasemapulazini kanye nokuzalwa kunamagugu kanye nezici zayo.
Izinkoma zobisi zikhethwa ngokusekelwe ekuvuneni ubisi kwezinsuku ezingama-305 zokulahlwa, kucatshangwa iminyaka yobudala kanye nokuzala, amafutha okubisi kanye nokuqukethwe kwamaprotheni, ijika le-lactation. Ukuhlolwa kwenziwa ngokudla, ukugcina nokusebenzisa izilwane ngokuvumelana nezindinganiso kanye nemigomo. Kungcono ukuqhuba ukuhlolwa okunjalo ngezikhathi eziningana zokulahla.
Izinkomo zenkomo zikhethiwe ngesikhathi sokuphila nangemva kokuhlatshwa. Ezikhathini eziphilayo, ingaphandle, inzuzo yesisindo kanye nesisindo esiphilayo kulinganiselwa lapho sifinyelela eminyakeni ethile. Khona-ke, ukuhlolwa okuqala emva kokubulala kuhlanganiswa nezinkomba eziyisisekelo zokukhiqiza inyama, njengokuhlaba umkhiqizo, isilinganiso samanoni, inyama namathambo, ikhalori, ukunambitheka nabanye.
Ama-pigs akhethwe ukukhiqiza, ukuhlola ukukhwabanisa kwawo, inani lama cubs kwelinye ilitha, okungaqondile, ikhwalithi yezidumbu zenyama.
Hlola izinhlobo ezinhle zezinkukhu ezindaweni ezihlukahlukene zokukhiqiza.I-Fine-wool kanye ne-half-fine-sheep ekhethiwe ukuze kubonwe izinkomba ezibonakalayo nezilinganiselwe zoboya obugqwetshiwe ngonyaka, ikhwalithi ye smushki ithathwa ngokubhekwa ngamaswidi, izinhlanzi zoboya bezinwele zikwahlulelwa ngekhwalithi yezimvu, umsila we-fat kanye ne-meat-wool ngobuningi kanye nekhwalithi yenyama.
Phakathi kwezinyoni zezolimo ezizalweni zamaqanda, ukukhiqizwa kwamaqanda kanye nemingcele yeqanda kuyabalwa; ezinyoni zenyama, izinga lokunyuka kwesisindo esibukhoma, izindleko zokudla nge-1 kg yesisindo, ukunambitheka, njalonjalo.
Ukukhethwa kwezinkukhu nama-roost wesizwe: ividiyo
Ngokusho kwesikhathi eside
Izilwane zizuza isikhathi eside kubazali bazo. Izinhlobo ezahlukene kanye nemigqa yesikhathi sayo zingahluka. Ukuze imfuyo, kubalulekile ukukhetha abantu abanomkhiqizo ocebile kakhulu abagcina izimfanelo zabo ezibalulekile isikhathi eside.
Uyazi? Izinkomo ze-Aberdeen-Angus zidume ngokuphila kwayo isikhathi eside - izinkunzi zihlala iminyaka engu-18-20, kanti izinkomo zifinyelela eminyakeni engama-25-30. Isikhathi eside sokuphila siphinde silinganiswe ne-Tagil, Red Tambov neKostroma izinkomo.Indlela ejulile yokulondoloza izilwane emapulazini amakhulu kwaba nethonya elibi ekulindeni kokuphila kwezinkomo, futhi ukusetshenziswa nokuzalana kwezihlobo ngokuphila isikhathi eside kubaluleke kakhulu kubo.
Ngokusho kwezici zobuchwepheshe
Yibalulekile ekuthuthukiseni izimboni zezilwane. Ababelethi baqala ukucabangela ukuvumelanisa nezimo zobuchwepheshe zokuboshwa, okuyinto engabonakali ngaso sonke isikhathi ezilwaneni.
Imfuyo eningi ngokuvamile ihlanganisa imikhawulo yokuhamba nokuhlala ezindaweni ezincane. Izimo ezinjalo zibekezelela kakhulu abantu abanesimiso sezinzwa ezizinzile, evame ukusabela kokuqukethwe emaqenjini amakhulu.
Ukubamba izinkabi ezine-hardware kuye kwafaka phambili izidingo eziningi zemingcele ye-udder kanye namazinga wezinhlobo zobisi, izinga lokukhiqiza ubisi. Lapho begcina izilwane ezindaweni ezimboni, baqala ukukhetha imfuyo enezinyawo ezinamandla nezinselo, ngoba ubuso obunzima obuhlanganisa lezi zinkimbinkimbi bubangela ukulimala.
Hlola izinhlobo zamahansi, izinyoni ze-Guinea, izigwaca, ama-turkeys, amadada, ama-pheasants okuzala ekhaya.
Ngokwemvelaphi (i-genotype)
Ukukhethwa yi-genotype kunomthelela ekukhethweni kwesilwane ngokusho kwezimfanelo zayo ezifanelwe ukufaneleka ngisho nangaphambi kokuzalwa kwayo. Ngakho-ke, ababelethi yizizukulwane zezilwane, okubonisa okhokho namakhono abo okukhiqiza, abahamba phambili kanye nezinye izimpawu. Iningi lentengo yilabo abathintekayo ekutheni ukukhula okuqinile kwezimfanelo ezikhiqizayo kubonakala futhi okhokho bakhona ngamanani okurekhoda.
Ngesikhathi sokukhethwa, ukukhiqizwa kwezinto ezikude (abafowethu, odade nabanye) nakho kuhloswe. 
Ngekhwalithi yenzalo
Lokhu kukhetha kukuvumela ukuba unqume inani lezilwane esizweni. Ngokuvamile ihlose ukukhomba abakhiqizi bezilwane ezinhle kakhulu abazohlinzeka ngamakhosikazi akhethekile ngenzalo enezimfanelo ezifiselekayo.
Izilwane eziningi (isib. Izingulube), abesifazane bayabalulekile ngokulinganayo. Ngenxa yalokhu, epulazini lezingulube, abantu abaningi bathathwa njengendlela yokuboshwa kokuqala okudingekayo ekukhiqizeni imfuyo.
Ukuhlolwa kwenzeka ngesilinganiso samatta, ubisi, ukuzuza kwesisindo kanye nezinye izici, bese uhlwanyela ngezinhlamvu ezinhle kakhulu eziwela emhlambini omkhulu.
Funda ukuthi ungaqukatha kanjani inhlabamkhosi.
Ikhefu likhethiwe, lihlolisise amadodakazi akhe ngezici zobungcweti nezokulinganisa ubisi, isivuno, nesisindo, nokuba khona kwezibonakaliso zobuchwepheshe.
Lezi zinkomba zifaniswa kanje:
- namadodakazi avela kwabanye abakhiqizi;
- nomama;
- nabanye ontanga;
- ngedatha yezinkomo ezimisiwe;
- ngezindinganiso nemigomo yohlobo.
Uma lezi zibalo zifinyeleleka, khona-ke inkunzi ikhethwa njengomkhiqizi, uma iyancipha, khona-ke owesilisa onjalo usetshenziselwa ngokulinganayo noma enqatshelwe.
Ukuze kuqinisekiswe ukuthi izingane zilungile, ezinye izici nazo zicatshangelwa:
- iminyaka yobubili bomzali;
- ithonya lomama;
- ukondla kanye nezimo zezindlu;
- ukuhlolwa okuphelele nokuhlaziywa kwayo yonke inzalo ephumayo;
- ukuchithwa kokulinganisa kwezici zokuzala;
- inani lazo zonke izinzalo kanye nezinhlanganisela zayo zozalo.
Thola ukuthi yimiphi imithetho yokugcina izinyoni emapulazini asepulazini.
Amafomu okukhethwa
Ekulweni kwezilwane, kunezinhlobo ezahlukene zezibili ezifanayo.
Ngamunye
Ngokukhethwa komuntu ngamunye, owesifazane ngamunye ukhethwe ngokukhethekile ukuxuba owesilisa ukuze akhiqize inzalo ngezinkomba ezinhle kakhulu zekhwalithi. Ukuzikhethela okunjalo isikhathi esiningi sokudla nokubiza. It isetshenziswa ikakhulukazi ukuhola broods ukuzalanisa.
Akufanelekile ukuxoshwa kwamakhemikhali kuma-breeding enterprises, njengalolu cala iningi lembewu evela kubakhiqizi abahle kakhulu lilahlekile. 
Inyama iveza amajuba - iNkosi. Amajuba ayingqayizivele, ngakho-ke ukukhethwa komuntu ngamunye kulungile.
Iqembu
Uma usebenzisa ukukhethwa kweqembu eqenjini labesifazane, okungenani kukhethwe amadoda amabili.
Ukukhetha kweqembu kunezinhlobo ezintathu:
- umahluko. Uma ukhetha izinhlobo ezinjalo zeqembu, umkhiqizi ongcono ukhethwe ukufaka umanyolo weqembu labesifazane, futhi uma kungekho isidoda esanele, esinye sisetshenziselwa ukuthi akuyona into engcono kakhulu kumkhiqizi. Lokhu kukhethwa kuvame ukusetshenziselwa iziteshi zokuzalanisa isizwe, kanye nokwehlukaniswa kwezilwane;
- ukulingana. Ngalolu hlobo, amadoda angama-2-3 akhethwe, anezinkomba ezifanayo zekhwalithi, futhi asetshenziswa eqenjini elifanayo labesifazane ngokulandelana okufanayo. Lolu hlobo lusetshenziselwa ukuhlolwa, kanye nokuthuthukisa umkhiqizo nezinye izimfanelo. Khona-ke umkhiqizi wesilisa, owanikeze amanani aphakeme kakhulu, uba umholi, futhi bonke abanye bathola isimo sokugcina, noma, ngemiphumela embi, bamane banqatshelwe. Lo mbono usiza ukukhetha umkhiqizi osebenza kahle kakhulu;
- okungahambelani. Uma usebenzisa lolu hlobo lwabesilisa, abanezinkomba ezihlukahlukene zekhwalithi, basebenzisa ukufaka umquba iqembu lezinsikazi ngendlela yokushintsha. Le ndlela ayitholakali isetshenziswe eziteshini zokwenza umsebenzi wokuzalanisa, futhi kancane kancane iyanyamalala emkhakheni wokukhethwa kwezilwane.
Izindlela zokukhetha
Kunezindlela ezimbili zokuqoqa - eziyindilinga futhi ezingenangqondo.
I-homogeneous (i-homogeneous)
Le ndlela iqukethe ukukhethwa kwendodana yesilisa. Ngesikhathi esifanayo, bobabili abantu banezimfanelo ezifanayo ezidingekayo ukuze bahlanganise futhi baqinise esizukulwaneni esizayo.
Isibonelo, ihhashi elisheshayo likhethwa ngehhashi elisheshayo, futhi inkunzi enezikhwama eziphakeme kakhulu zobisi itholakala yinkunzi, enekhanda eliphezulu elikhiqizwa izakhi zofuzo, okungukuthi, ukhetho lwenziwa ngezizathu ezifanayo.
Uyazi? Ngakho-ke, usosayensi odumile-imfuyo Kuleshov PN emisebenzini yakhe, waphawula ukuthi izinga lokufanisana phakathi kwabantu abakhethiwe lingase lihluke, kodwa kunamandla kakhulu, amathuba okuba ifa lezimfanelo ezifunayo.
Ngemuva kokuthola inzalo ikhethiwe ukuze izalise abantu abazalisayo abanezimfanelo ezidinga kakhulu ezivela kubazali bazo. Le ndlela ivumela ukuthuthukisa nokuhlanganisa izimfanelo ezinhle zefektri kubantwana abazayo.
Ukukhethwa kwezilwane nokukhiqiza kwabo ngokwezimfanelo nezimfanelo ezidingekayo kwandisa izici ezidingekayo kumuntu omusha ngamunye, futhi kuthuthukise isithunzi sokuzalana kohlobo. 
Ukukhetha okuyingqayizivele kunomthelela ekubunjweni kwezimpawu ezithile emhlambini wezinkomo. Ngakho-ke, ukufaniswa koboya obunikezwe ngezimvu kubhekwa njengento ebaluleke kakhulu ekukhiqizeni izembatho.
Минусом такого подбора является нарастание гомозиготности, снижение изменчивости, показателей продуктивности, снижению жизнестойкости.
Ukuze ulungise noma yikuphi ukuhluleka kohlobo, le ndlela ayikwazi. Ngaphezu kwalokho, akubambi iqhaza ekuveleni kwezimfanelo ezinhle.
Ukuhluka okuqakathekileko kwendlela ehlelekileko kuzalana nokukhethwa kwezilwane ezinobungane obuhlobene (inbreeding).
I-Heterogeneous (i-heterogeneous)
Iqukethe ekukhetheni kwezilwane ezixubhayo ezingafani phakathi kwezici nezimfanelo. Inhloso yale ndlela ukuthuthukisa ukuhluka kwezimpawu, ukuthuthukisa izakhiwo ezikhiqizayo, ukumelana, imisebenzi yokuzala, ukunciphisa izimfanelo ezimbi.
Kuye, cabangela izinga lomkhiqizo, izici zokubukeka, ukuzalwa nokuzalwa. Kulesi simo, abantu abakhethiwe ukuxuba bangase bahluke ngobudala, futhi izinga lokuphikisana okungafani nalo lingase lihluke. Njengoba behluke kwezinye izimfanelo, abantu bangase babe nokufana kwabanye.
Ukusebenzisa indlela ekhethiwe yokukhetha kuhilela ukuthola inzalo, eyothola ifa elihle labazali bobabili, kanye negalelo ekuthuthukiseni izimpawu ezifunwa zokukhiqiza nezimfanelo ezilwaneni. Isizukulwane esilandelayo sizoba nokudla okungcono.
Izinga lokuhlukahluka kwenzalo yesikhathi esizayo ngale ndlela kuxhomeke ezinkomba zekhwalithi zabazali ngamunye, abanokungafani phakathi kwemfuyo yonke. Ukuzithemba kuthuthukiswa ngokukhethekile futhi ukulungiswa phakathi kwezinkomba ezikhiqizayo zomama namadodakazi abo kunciphisa esimweni uma izinkomba zabazali zihlukahluka ngezindlela ezihlukahlukene emhlambini wezinkomo.
Kubalulekile! Ukuze kususwe isizukulwane esizayo ukuntuleka komzali oyedwa, akunakwenzeka ukhethe omunye umzali ngubani, nakuba engakwazi ukuqeda noma ukunciphisa le nsalela, kodwa ngesikhathi esifanayo inezinye izimfanelo ezimbi.
Indlela ehlukumezayo isetshenziselwa ukuqeda ukwehluleka komunye wabazali abanalo ukuze bangathinti isizukulwane esizayo. Le ndlela yokukhetha ibizwa ngokuthi ikulungiswa, futhi ibuye iqondise noma ithuthukise.
Kodwa kudingekile ukucabangela ukuthi umphumela othile ongenakukwazi ukususwa uma ukhetha omunye umzali onenkinga ehlukile ngokuphelele. Ngakho-ke, ukuntuleka kwamahhashi ngesimo somzimba wesikhumba akukwazi ukulungiswa ngokukhetha i-stallion, one-clubfoot. 
Ngakho-ke, uma inkomo enomsoco omnandi, kodwa okuncane okuqukethwe kwamanoni amancane, akufanele ukhethe inkunzi yokukhiqiza enezinkomba zofuzo ezandisa uketshezi lwamafutha obisi, kodwa ukunciphisa ukukhiqiza ubisi. Isinqumo esinjalo sizosiza ekulahlekelweni kwekhwalithi ewusizo enkomo.
Kodwa ngenxa yenkomo enomsoco ophansi wobisi, ukuthuthukisa ukwanda nokukhiqiza, kungcono ukhethe inkunzi yokukhiqiza enezakhi zofuzo ezinokuqukethwe okuphezulu kwamanoni ebisi. Abantu abanomzimba omzimba obuthakathaka bakhethiwe ngabantu abanomzimba onamandla kakhulu.
Nge-heterogeneous method heterosis ngokuvamile ivela. Amafomu aphezulu kakhulu wokukhethwa - ukuwela nokuxuba.
Kumele kuqashelwe ukuthi i-homogeneity kanye ne-hterogeneity yokukhethwa yinto ehambisanayo, ngakho-ke, ngokusho kwesinye isici, ukukhethwa kuyoba yindlela ehambisana nayo, kanti enye - yiyona into engavamile. Ngakho-ke, isibonelo, uma iqembu lezinkomo linikeza ubisi ama-4.5 amathani ngonyaka ngomthelela wamafutha ka-3.7%, futhi inkunzi yomkhiqizi ifakwe kubo ngezibonisi zofuzo zomkhiqizo wezitoni ezingu-9 ngokuqukethwe kwamafutha ka-3.8%, kanti isivuno siyoba e-heterogeneous, nase-fat fat - e-homogeneous. 
Ukukhetha okukhethiwe nokukhethwa kwezilwane kubalulekile ekufinyeleleni amazinga aphezulu kwezolimo. Izimo zezohwebo zezilwane zibeka izidingo ezintsha ezilwaneni, futhi ukukhethwa kwansuku zonke kuzicabangela, ukukhetha izilwane ngezici ezidingekayo. Imiphumela emihle ekukhethweni kwezilwane kanye nokwakhiwa kwezibini kunika indlela ephelele.
