Dab tsi tshwm sim hauv qab no hauv cov pob kws yog qhov yooj yim rau kev saib xyuas, tab sis cov pob kws hauv paus architecture tuaj yeem ua lub luag haujlwm tseem ceeb hauv dej thiab khoom noj khoom haus, cuam tshuam rau drought kam rau ua, dej siv efficiency, thiab sustainability. Yog tias cov neeg yug tsiaj tuaj yeem txhawb cov pob kws cog qoob loo kom loj hlob ntawm lub kaum sab xis, cov qoob loo tuaj yeem nkag mus rau cov peev txheej tseem ceeb hauv cov av.
Thawj kauj ruam mus rau lub hom phiaj yog kawm cov noob uas koom nrog hauv gravitropism, hauv paus kev loj hlob hauv kev teb rau lub ntiajteb txawj nqus. Nyob rau hauv ib txoj kev tshawb no tshiab luam tawm nyob rau hauv lub Cov txheej txheem ntawm National Academy of Sciences, University of Wisconsin cov kws tshawb fawb, koom tes nrog cov kws tshawb fawb ntawm University of Illinois. txheeb xyuas plaub yam noob hauv pob kws thiab cov qauv cog Arabidopsis.
Thaum lub noob germinating yog tig rau ntawm nws sab, qee cov hauv paus hniav ua rau tam sim ntawd, ntxhab tig ntawm lub ntiajteb txawj nqus, thaum lwm tus tig ib feem qeeb dua. Cov kws tshawb fawb tau siv cov kev pom kev siv tshuab los soj ntsuam qhov sib txawv me me hauv cov hauv paus gravitropism hauv ntau txhiab tus yub thiab ua ke cov ntaub ntawv no nrog cov ntaub ntawv caj ces rau txhua cov yub. Qhov tshwm sim tau qhia txog qhov yuav ua haujlwm ntawm gravitropism noob hauv genome.
Daim ntawv qhia tau txais cov kws tshawb fawb mus rau thaj tsam sab xis hauv genome - thaj tsam ntawm ob peb puas noob - tab sis lawv tseem nyob deb ntawm kev txheeb xyuas cov noob tshwj xeeb rau gravitropism. Hmoov zoo, lawv muaj ib lub cuab yeej uas yuav pab tau.
"Vim tias yav dhau los peb tau ua tib yam kev sim nrog cov nroj tsuag Arabidopsis nyob deb, peb muaj peev xwm sib piv cov noob nyob rau thaj tsam ntawm cov genome hauv ob hom. Kev soj ntsuam tom qab tau txheeb xyuas tus kheej ntawm plaub lub noob uas hloov cov hauv paus gravitropism. Cov ntaub ntawv tshiab tuaj yeem pab peb nkag siab tias lub ntiajteb txawj nqus zoo li cas hauv paus system architectures, "hais tias Edgar Spalding, tus xibfwb hauv Department of Botany ntawm University of Wisconsin thiab tus thawj coj ntawm txoj kev tshawb no.
Matt Hudson, tus xibfwb hauv Department of Crop Sciences ntawm University of Illinois thiab tus kws sau ntawv kawm, ntxiv, "Peb tau saib qhov kev tshawb fawb tsis zoo hauv pob kws uas tseem ceeb rau ntau yam, tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus ntawm kev hloov huab cua. . Thiab peb tau ua nws los ntawm kev ua kom muaj qhov sib txawv ntawm cov nroj tsuag ua haujlwm hauv peb qhov kev nyiam. "
Pob kws thiab Arabidopsis, me me mustard txheeb ze piav qhia los ntawm cov kws paub txog tsiaj txhu, tau hloov zuj zus txog 150 lab xyoo sib nrug hauv keeb kwm evolutionary. Hudson piav qhia tias txawm hais tias ob hom tsiaj sib koom ua haujlwm hauv cov nroj tsuag, cov noob uas tswj lawv muaj feem cuam tshuam rau hauv genome thaum lub sijhawm. Qhov ntawd yog qhov ua tau zoo rau kev txo qis cov noob caj noob ces.
Hauv cov kab mob sib xws, cov noob caj ces zoo li nyob rau hauv kwv yees li tib yam kev txiav txim hauv genome (xws li ABCDEF). Txawm hais tias tib lub noob tuaj yeem muaj nyob rau hauv cov tsiaj uas nyob deb, qhov kev txiav txim ntawm cov noob hauv cheeb tsam cov duab qhia kev zoo tsis sib xws (piv txwv li, UGRBZ). Tom qab cov kws tshawb fawb tau txheeb xyuas qhov twg los saib hauv txhua lub genome, qhov sib txawv ntawm cov noob tsis sib xws ua rau cov noob caj noob ces (qhov no B) tshwm sim.
Hudson hais tias "Kuv xav tias nws yog qhov txias heev uas peb tuaj yeem txheeb xyuas cov noob peb yuav tsis pom lwm yam los ntawm kev sib piv genomic intervals ntawm cov nroj tsuag tsis cuam tshuam," Hudson hais. "Peb ntseeg tau zoo nkauj tias lawv yog cov noob zoo thaum lawv tau tawm ntawm qhov kev tshuaj ntsuam no, tab sis Spalding cov pab pawg tom qab ntawd siv xya lossis yim xyoo ntxiv kom tau txais cov ntaub ntawv lom neeg los txheeb xyuas lawv ua, qhov tseeb, ua lub luag haujlwm hauv gravitropism. Tom qab ua tiav qhov ntawd, kuv xav tias peb tau lees paub tag nrho txoj hauv kev xws li yav tom ntej, koj tuaj yeem siv txoj kev no rau ntau yam phenotypes. "
Spalding sau cov qauv no tej zaum yuav muaj kev vam meej tshwj xeeb vim tias kev ntsuas meej tau ua nyob rau hauv ib puag ncig ib puag ncig.
"Feem ntau, cov kws tshawb fawb pob kws yuav ntsuas lawv qhov kev txaus siab ntawm thaj chaw, thaum Arabidopsis cov kws tshawb fawb nyiam tsa lawv cov nroj tsuag hauv chav loj hlob," nws hais. "Peb ntsuas lub hauv paus gravitropism phenotype nyob rau hauv txoj kev tswj tau zoo heev. Cov noob no tau loj hlob rau ntawm lub phaj petri, thiab qhov kev ntsuam xyuas tsuas yog siv sij hawm xwb, tsis zoo li cov yam ntxwv uas koj tuaj yeem ntsuas hauv lub ntiaj teb tiag tiag uas qhib rau txhua yam kev hloov pauv. "
Txawm hais tias tus cwj pwm zoo tuaj yeem ntsuas hauv ib puag ncig ib puag ncig, tsis yog txhua tus cwj pwm ua rau cov neeg sib tw zoo rau txoj kev no. Cov kws tshawb fawb hais txog qhov zoo ntawm cov lus nug yuav tsum yog qhov tseem ceeb rau cov nroj tsuag kev ua haujlwm, kom ntseeg tau tias tib cov noob caj noob ces muaj nyob hauv hom tsis sib xws.
"Gravitropism tej zaum yuav muaj txiaj ntsig tshwj xeeb rau kev kawm los ntawm txoj hauv kev no vim tias nws yuav yog qhov tseem ceeb rau kev tshwj xeeb ntawm cov cag thiab cov hauv paus hniav tom qab kev vam meej ntawm thaj av," Spalding hais.
Hudson sau ntawv gravitropism yuav yog qhov tseem ceeb rau kev ua kom muaj kev thaj yeeb sib txawv, ib yam nkaus.
"NASA txaus siab cog qoob loo ntawm lwm lub ntiaj teb lossis hauv qhov chaw thiab lawv yuav tsum paub tias koj yuav tsum tau yug los ua li ntawd," nws hais. "Cov nroj tsuag zoo nkauj discombobulated yam tsis muaj lub ntiajteb txawj nqus."
Tsab ntawv xov xwm, "Leveraging orthology nyob rau hauv pob kws thiab Arabidopsis QTL los txheeb xyuas cov noob cuam tshuam rau ntuj variation nyob rau hauv gravitropism," yog luam tawm nyob rau hauv lub Cov txheej txheem ntawm National Academy of Sciences [DOI: 10.1073/pnas.2212199119]. Cov kev tshawb fawb tau nyiaj txiag los ntawm National Science Foundation.
Lub Department of Crop Sciences nyob hauv College of Agricultural, Consumer and Environmental Sciences ntawm University of Illinois Urbana-Champaign.
Ib qhov chaw: https://www.sciencedaily.com