Tus kws tshawb fawb Cornell tau ua tiav qhov kev pab cuam ntev xyoo los tsim cov txiv lws suav tshiab uas ib txwm tiv thaiv kab tsuag thiab txwv tsis pub hloov cov kab mob kis los ntawm kab.
Martha Mutschler-Chu, tus kws cog qoob loo thiab noob caj noob ces uas yog tus thawj coj ntawm txoj haujlwm, tsis ntev los no tau tso ib qho kev tshawb fawb thawj zaug ntawm kab-resistant txiv lws suav nyob rau hauv US Department of Agriculture germplasm system thiab Tomato Genetics Resource Center ntawm University of California-Davis, uas yuav muaj rau leej twg nkag mus rau cov nroj tsuag rau kev tshawb fawb.
Lub caij nplooj ntoo hlav no, Mutschler-Chu yuav ua tiav txoj kev tsim kho tshiab ntawm 20 cov neeg tseem ceeb kab, uas yuav ua rau muaj rau txhua lub tuam txhab xav tau noob, uas tuaj yeem tsim cov kab tsuag tiv thaiv kab mob rau hauv ntau hom kev lag luam. Kev cog qoob loo tshiab tuaj yeem coj cov tuam txhab noob mus txog tsib xyoos ua ntej lawv pib muag cov kab tshiab uas tiv thaiv kab mob.
Rau cov neeg cog qoob loo, cov txiaj ntsig no yuav ua rau cov qoob loo poob qis thiab cov txiv hmab txiv ntoo puas, thaum tseem tshem tawm lossis txo kev siv tshuaj tua kab thiab tiv thaiv ib puag ncig.
Cov tshuaj tiv thaiv kab mob hauv cov txiv lws suav no tau yoog los ntawm cov txiv lws suav qus hauv Peru, Solanum pennellii. Cov txiv lws suav Andean muaj cov plaub hau me me hu ua trichomes uas tso tawm cov kua dej ntawm cov suab thaj, hu ua acylsugars, uas tawm tsam kab. Nyob rau hauv txoj kev no, cov nroj tsuag muaj kev nyab xeeb thiab ib txwm tiv thaiv ntau yam kab, tiv thaiv lawv los ntawm kev pub noj, noj nplooj thiab hloov cov kab mob, lossis tso qe, qhov twg larvae yuav ua rau cov nroj tsuag puas.
"Cov kab tshiab sib txuas cov nroj tsuag zoo dua thiab cov txiv hmab txiv ntoo nrog cov qib acylsugars siab, cov tuam txhab cog qoob loo ua ke yuav tsum tau xa cov acylsugar zoo rau hauv kev lag luam ntau yam," said Mutschler-Chu, tus kws tshaj lij hauv Tsev Kawm Ntawv ntawm Kev Sib Koom Tes Nroj Tsuag Science, Nroj Tsuag thiab Qeb Qeb. , ib feem ntawm College of Agriculture thiab Life Sciences.
Hauv kev sim teb thiab chaw sim ntawm cov kab tshawb fawb thawj zaug, cov kws tshawb fawb cog ntoo los ntawm Cornell thiab xya lwm tus koom tes hauv tsev kawm qib siab (North Carolina State University; University of Georgia, Clemson University; University of Florida; University of California, Davis; University of California, Riverside; thiab Tennessee Tech University) pom tias cov qib zoo thiab daim ntawv ntawm acylsugars tswj western paj thrips uas kis pom wilt. tus kab mob no, thiab qos yaj ywm whiteflies, uas kis kab mob daj nplooj curl. Yog li ntawd, cov nroj tsuag tsawg tsawg tau kis nrog cov kab mob loj heev thiab, hauv teb mus sib tw, cov kab mob no tshwm sim lig rau lub caij.
"Rau kev tswj hwm tus kab mob zoo tshaj plaws, kuv tau hais tias cov tuam txhab cog qoob loo siv ob txheej txheej: tsim cov hybrids nrog ob qho tib si acylsugar zoo thiab tus qauv kab mob tiv thaiv cov noob," Mutschler-Chu hais. Yog hais tias kab tswj kom kis tau tus nroj tsuag nrog ib tug kab mob txawm hais tias ntawm cov acylsugars, cov kab mob resistant noob muab kev tiv thaiv ntxiv.
"Nws yog lub kaw lus uas yuav tiv thaiv tus kab mob tiv thaiv cov noob siv hluav taws xob vim tias yog tias muaj tus kab mob tsawg dua nkag mus rau hauv cov nroj tsuag, qhov tshwm sim uas tus kab mob yuav muaj kev hloov pauv tsis tu ncua uas ua rau muaj kev cuam tshuam uas kov yeej qhov kev tawm tsam kuj poob qis," Mutschler-Chu hais. Ib yam li ntawd, txij li acylsugars tsis muaj tshuaj lom thiab tsis tua kab, muaj kev xaiv tsawg dua rau cov kab lawv tus kheej kom ua siab ntev, yog li lawv hloov maj mam rau cov tshuaj tua kab.
Cov kab tshiab cov neeg tseem ceeb, sai sai no yuav muaj rau cov tuam txhab noob, muaj feem ntau ntawm cov noob tsiaj qus los ntawm S. pennellii uas txhawb nqa agronomically undesirable zoo tshem tawm ntawm lawv cov genomes. Mutschler-Chu khaws cov noob acylsugar tseem ceeb thaum tshem tawm ntau lwm cov noob tsiaj qus uas ua rau muaj qhov tsis zoo xws li cov ceg ntoo, cov txiv hmab txiv ntoo me me thiab tsis muaj ntxhiab. Thaum cov kab tshawb fawb thawj zaug muaj txog 12% qus S. pennellii DNA, cov kab tshiab tshaj plaws tau nqis mus rau kwv yees li 2.5% qus DNA.
Hauv cov ntsiab lus dav dav, kev ua haujlwm xyaum ua kom pom cov txheej txheem rau kev sib koom ua ke ntawm qhov muaj txiaj ntsig zoo, raws li kev nyab xeeb ntawm ntuj tsim, tswj los ntawm ntau cov noob, thiab qhov ntawd muaj txiaj ntsig zoo. kab mob thiab ntau yam kab tsuag, ib lub tswv yim uas tuaj yeem muaj txiaj ntsig zoo rau lwm cov qoob loo, Mutschler-Chu tau hais.
Thaum cov neeg tseem ceeb cov kab yuav raug tso tawm uas tsis yog tshwj xeeb rau cov tuam txhab noob qoob loo kom loj hlob zoo rau hauv lawv cov khoom lag luam, lawv yuav tsum tau thov daim ntawv tso cai nrog Cornell's Center for Technology Licensing ua ntej lawv tuaj yeem muag cov noob.