Qhov sib txawv tseem ceeb ntawm gametophytic thiab sporophytic tus kheej tsis sib haum yog tias hauv gametophytic tus kheej tsis sib haum xeeb, paj ntoos phenotype yog txiav txim siab los ntawm nws cov gametophytic haploid genotype thaum nyob rau hauv sporophytic tus kheej tsis sib haum, paj ntoos phenotype yog txiav txim los ntawm diploid genotype ntawm cov nroj tsuag..
Kev tsis sib xws ntawm tus kheej yog kev tswj hwm pollination hauv cov nroj tsuag. Nws feem ntau tiv thaiv tus kheej-pollination thiab tswj kev hla-pollination, uas yog ib qho evolutionary zoo. Kev tsis sib haum xeeb ntawm tus kheej yog tshwm sim los ntawm kev cuam tshuam tsis zoo ntawm cov paj ntoos thiab cov ntaub so ntswg hauv tib qho allele. Txawm hais tias pollens thiab pistils siv tau thiab fertile, paj ntoos germination tsis tshwm sim hauv cov nroj tsuag no. Thaum pollen germination tsis tshwm sim, lub pollen raj tsis tuaj yeem tsim. Tom qab ntawd cov paj ntoos tsis xa txiv neej gametes rau hauv poj niam gametes rau fertilization. Vim li ntawd, lawv tsis tuaj yeem tsim cov noob.
Muaj ob qhov kev tsis sib haum xeeb ntawm tus kheej uas yog gametophytic tus kheej tsis sib haum thiab sporophytic tus kheej tsis sib haum. Lawv yog ib qho chaw uas nws tus kheej tsis sib haum xeeb uas yog ua raws li ib qho chaw ntau-allelic (S). Qhov chaw no muaj ib qho pistil qhia S gene thiab ib paj ntoos qhia S gene.
Gametophytic Self Incompatibility yog dab tsi?
Gametophytic tus kheej tsis sib haum yog ib hom kev tsis sib haum ntawm tus kheej uas S phenotype ntawm paj ntoos yog txiav txim siab los ntawm nws tus kheej haploid S genotype. Nws yuav tsum tau nruj codominance ntawm S alleles nyob rau hauv lub pistil los tiv thaiv heterozygous cov neeg los ntawm kev sib raug zoo nrog lawv tus kheej pollens. Feem ntau, niam txiv paj ntoos nrog S1 thiab S2 genetic Constitution tsim gametes ntawm S1 thiab S 2 Nyob rau hauv ib tug poj niam niam txiv, tib alleles S1 and S2 yog codominant thiab tau hais. Yog li ntawd, thaum paj ntoos nplej nrog S1 thiab S2 poob rau ntawm tsob ntoo nrog S1 thiab S 2, ob qho tib si pollens yuav tsis germinate vim cov tshuaj tiv thaiv nyob rau hauv stigma yog codominance. Yog S1 thiab S2 paj ntoos poob rau S1 thiab S3 nroj tsuag, S2 paj ntoos tuaj yeem tawg vim qhov tsis sib xws. Ntxiv mus, yog S1 thiab S2 paj ntoos poob rau S3 thiab S 4, ob qho tib si paj ntoos tuaj yeem tawg vim nws sib haum tag nrho.
Daim duab 01: Gametophytic Self Incompatibility
Kev nruj nruj yog qhov tseem ceeb hauv gametophytic tus kheej tsis sib haum. Pollen grains muaj sib txawv alleles rau cov ntaub so ntswg style yuav germinate thaum lwm pollens yuav tsis germinate. Ntxiv mus, gametophytic self-incompatibility yog ntau tshaj li sporophytic self-incompatibility. Tab sis, nws tsis to taub zoo.
Sporophytic Self Incompatibility yog dab tsi?
Sporophytic self-incompatibility yog ib tug self-incompatibility system nyob rau hauv uas paj ntoos S phenotype yog txiav txim los ntawm lub diploid S genotype ntawm nws niam nws txiv cog. Nyob rau hauv lub sporophytic tus kheej-incompatibility system, lub genotype ntawm sporophyte (niam txiv cog) txiav txim siab incompatibility cov tshuaj tiv thaiv thiab S1>S2, S. 2>S33>S4, etc.
Daim duab 02: Sporophytic Tus Kheej Incompatibility
Txiv neej gametes ntawm S1 thiab S2 coj zoo li S1 Ib yam, nyob rau hauv cov style, S1 thiab S2 coj zoo li S1, qhov sib xyaw ntawm lawv yog tsis sib haum. Ib yam li ntawd, tus ntoo khaub lig ntawm S1S21S3 kuj tsis sib haum. Tab sis, tus ntoo khaub lig ntawm S1S23S4yog sib xws. Sporophytic self-incompatibility feem ntau pom ntawm cov tswv cuab ntawm tsev neeg Brassicaceae.
Dab tsi yog qhov zoo sib xws ntawm Gametophytic thiab Sporophytic Self Incompatibility?
- Gametophytic thiab sporophytic tus kheej tsis sib haum yog ob hom kev tsis sib xws ntawm tus kheej.
- Ob lub tshuab tiv thaiv tus kheej pollination thiab txhawb nqa hla-pollination.
- Ob lub tshuab yog evolutionarily zoo.
- Lawv yog ib qho chaw nws tus kheej tsis sib haum xeeb.
- Ntxiv mus, lawv tau nruj tswj cov kab mob caj ces.
Qhov txawv ntawm Gametophytic thiab Sporophytic Self Incompatibility yog dab tsi?
Kev tsis sib haum ntawm tus kheej yog ib txoj hauv kev uas tiv thaiv pollens los ntawm ib lub paj fertilizing lwm cov paj ntawm tib tsob nroj (tus kheej pollination). Gametophytic self-incompatibility tshwm sim yog tias paj ntoos genotype yog tib yam li poj niam genotype. Yog li ntawd, gametophytic self-incompatibility yog txiav txim los ntawm lub genotype ntawm haploid pollens. Nyob rau hauv sib piv, sporophytic tus kheej-incompatibility yog txiav txim los ntawm lub diploid genotype ntawm sporophyte tiam. Sporophytic self-incompatibility tshwm sim thaum paj ntoos muaj ib qho ntawm ob qho alleles hauv niam txiv sporophyte. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm gametophytic thiab sporophytic tus kheej incompatibility.
Hauv qab infographic qhia ntau cov ntsiab lus ntawm qhov sib txawv ntawm gametophytic thiab sporophytic tus kheej tsis sib haum.
Summary – Gametophytic vs Sporophytic Self Incompatibility
Kev tsis sib haum ntawm tus kheej yog ib qho ntawm cov txheej txheem tseem ceeb uas txhawb nqa cov paj ntoo khaub lig. Nws tiv thaiv fusion ntawm txiv neej thiab poj niam gametes fertile ntawm tib lub paj lossis tib tsob nroj. Ntxiv mus, nws tus kheej incompatibility plays lub luag haujlwm tseem ceeb hauv kev tsim cov noob hybrid. Gametophytic tus kheej incompatibility yog txiav txim los ntawm lub genotype ntawm gametes thaum sporophytic tus kheej incompatibility yog txiav txim los ntawm lub genotype ntawm cov nroj tsuag. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm gametophytic thiab sporophytic tus kheej incompatibility.
