Mbatata chimwe chezvirimwa zvakakura zvakasiyana-siyana pasi rose. Munharaunda yeAndean, iyo inonzi kwakaberekerwa mbatatisi, kune marudzi anopfuura 4500 emarudzi manomwe akasiyana. Zvisinei, nhamba iyi iri kudzikira pamwero unotyisa, nemarudzi ose egamuchidzanwa akarimwa nevarimi kwezviuru zvemakore uye madzitateguru ekare embatatisi dzomusango achinyangarika. Masayendisiti anosimbirira: zvakakosha kuchengetedza genetic kusiyana kwezvirimwa; ichi chinhu chinodiwa kuti uve nechokwadi chebudiriro yekurima.
Imwe nzira ndeyekuchengetedza mhando mu vitro. Iyo International Potato Center (CIP) inochengetedza yakakura uye yakasiyana-siyana in vitro muunganidzwa wepasi rose, iine zviuru gumi nezviviri zvembatatisi zvinowanikwa mubhangi remajini. Pamusoro peizvi, CIP yakagadzira muunganidzwa we cryobank unochengetedza zviuru zvitatu nemazana matanhatu emasampuli.
"Kunyange zvazvo in vitro uye kuunganidza mumunda zvakanaka pakuchengetedza kusiyana kwemajini munguva pfupi kusvika pakati penguva, izvi zvinogona kuva mhinduro inodhura uye isingavimbiki munguva refu," anotsanangura kudaro Rainer Vollmer, nyanzvi ye cryopreservation paCIP. "Zvienzaniso zvakachengetwa mu vitro zvinofanirwa kuramba zvichiparadzirwa pasi pemamiriro asina kuchena; kuunganidzwa kwemumunda kunonetsekana nekushushikana. Nokudaro, cryopreservation inzira inodhura uye yakavimbika yekuchengetedzwa kwezvipenyu zvakasiyana-siyana. Nhasi, munhu mumwe chete anogona kuomesa 300-450 mbatatisi nhungirwa muzuva rimwe rekushanda. "
Cryopreservation inoshandisa liquid nitrogen (196°C) kukurumidza kuomesa matishu sampuli dzakatorwa kubva padzinde dzisina utachiona mu vitro.
Masayendisiti eCIP akagadziridza iyo mbatatisi cryopreservation protocol nekuyedza nzira dzakasiyana dzekugadzirisa masampula masampula akadaro asati apinda mu cryobank (semuenzaniso, kuwedzera sucrose kana cryoprotectants kubatsira masampula kupona kuchitonhora). Mhedzisiro yacho yakaratidza kuti kunyangwe kuwedzerwa kwe sucrose kwaisava nemhedzisiro yakakosha, kurapwa kutonhora kusati kwatonhora kwakawedzera mwero wekudzoreredzwa kwemasampuli mushure mekunyungudutswa ne14%.
“Chokwadi, kuchengetedza mbatatisi dzakasiyana ndicho chimwe chezvinangwa. Inoda zvakare kushandiswa muzvirongwa zvekupfuya mbeu kuitira kubatsira varimi kuti vatarisane nematambudziko akaita sezvirwere zvezvirimwa nekusanduka kwemamiriro ekunze. Kuwanikwa kwemhando dzakasiyana-siyana dzekuberekesa ndechimwe chezvinhu zvakakosha mukugadzirwa kwemhando itsva uye dzakavandudzwa. "
Muenzaniso ndeye Victoria mbatatisi dzakasiyana. Isati yasvika, blight inononoka inogona kuparadza kusvika makumi matanhatu muzana ezvirimwa muUganda. Rudzi rweVictoria rwakagadzirwa pachishandiswa samples kubva kuCIP, chakanakira kurwisa kunonoka blight. Mumakore gumi nemashanu apfuura, Victoria akapa mari inosvika bhiriyoni imwe chete yemadhora kuhupfumi hweUganda.
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