
Chinese Journal OF Rice Science >
Development of STS Marker Linked to Rice Blast Resistance Gene Pi9 in Marker Assisted Selection Breeding
Received date: 1900-01-01
Revised date: 1900-01-01
Online published: 2011-01-10
Indica rice line 751127 carrying broadspectrum rice blast resistance gene Pi9 was used as resistance gene donor for genetic improvement of Yangdao 6 and R6547. By alignment of genomic sequences from the Pi9 locus of 751127, Yangdao 6 and Nipponbare, codominant STS (sequencetagged site) marker PB91, which linked to the Pi9 gene, was developed for molecular markerassisted selection (MAS). Eight backcross lines carrying Pi9 were obtained, among which four lines contained the genetic background of Yangdao 6 and the other four lines had the R6547 background. Under natural disease infection conditions in Enshi County and Yichang County of Hubei Province, China, the Pi9carrying lines showed higher blast disease resistance than Yangdao 6 and R6547 in various degrees. The hybrids originated from 08C893, an R6547derived rice line, showed higher blast disease resistance as compared to the control Yangliangyou 6. The results suggest PB91 is an effective codominant marker for MAS of Pi9 which is a valuable resistance gene for the control of rice blast disease in Hubei area.
YIN De-suo,XIA Ming-yuan,LI Jin-bo,WAN Bing-liang,ZHA Zhong-ping,DU Xue-shu,QI Hua-xiong*
. Development of STS Marker Linked to Rice Blast Resistance Gene Pi9 in Marker Assisted Selection Breeding
[J]. Chinese Journal OF Rice Science, 2011
, 25(1)
: 25
-30
.
DOI: 10.3969/j.issn.1001-7216.2011.01.004
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