普通野生稻的抗水稻白葉枯病(Xanthomonas oryzae pv. oryzae)新基因Xa-23(t)的鑒定和分子標(biāo)記定位

章琦, 趙炳宇, 趙開軍, 王春連, 楊文才, 林世成, 闕更生, 周永力, 李道遠(yuǎn), 陳成斌, 朱立煌

作物學(xué)報(bào), 2000, 26(5): 536-542  DOI: 10.3321/j.issn:0496-3490.2000.05.004;      追溯原文......本站官方QQ群：62473826

普通野生稻; 稻白葉枯病; 新抗性基因; 分子標(biāo)記定位

中國(guó)農(nóng)業(yè)科學(xué)院作物育種栽培研究所農(nóng)業(yè)部作物遺傳育種重點(diǎn)開放實(shí)驗(yàn)室;廣西農(nóng)業(yè)科學(xué)院品種資源研究所;中國(guó)科學(xué)院遺傳研究所

經(jīng)抗譜評(píng)價(jià)、抗性類型比較、遣傳分析鑒定出一個(gè)來自普通野生稻的抗白葉枯病新基因Xa-23(t)(暫名)。結(jié)果表明它是迄今已知基因中抗譜最廣，抗性導(dǎo)入效應(yīng)很強(qiáng)的一個(gè)完全顯性的全生育期抗性基因。用攜有新基因Xa-23(t)的一對(duì)近等基因系(JG30^6*//Xa-23(t))構(gòu)建F₂群體中選出160個(gè)單株用SSR(微衛(wèi)星)標(biāo)記進(jìn)行基因定位，初步將該基因定位于水稻第11染色體SSR標(biāo)記OSR06和RM224附近，圖距分別為5.3cM和27.7cM。

Identifying and Mapping a New Gene Xa-23( t) for Resistance to Bacterial blight (Xanthomonas oryzae pv. oryzae) from O. ruf ipogon

ZHANG Qi1　ZHAO Bing-Yu1　ZHAO Kai-Jun1　WANG Chun-Lian1　YANG Wen-Cai1　LIN Shi-Cheng1　QUE Geng-Sheng 1　ZHOU Yong-Li1　LI Dao-Yuan2　CHEN Cheng-Bin2ZHU Li-Huang

Acta Agronomica Sinica, 2000, 26(5): 536-542

O. ruf ip ogon; Bacterial blight; New resistance gene; Molecular mapping

A new resistance gene to bacterial blight of Xa-23( t) from O. ruf ip ogon w as ident if iedbased on the resistance spectrum evaluated, comparison of resistance type, inheritance analy sisand testing the allelism relat ionship betw een Xa-23( t) and Xa-21. T he results indicated that it iscondit ioned by a new complete dominance overall resistance gene with the w idest spect rumresistance, and highest eff iciency of resistance t ransfer among all the know n g enes identified sofar. One hundred and six ty plants w ere selected from the F2 populat ion derived from a pair ofNear-isogenic line ( JG30* 6 / / Xa-23( t) ) for mapping the g ene by using 160 SSR markers. Theresistance gene was located on rice chromosome 11 ( 5. 3cM to OSR06, 27. 7cM to RM244) .

►基因列表◄
  白葉枯病抗性基因 Xa23