|
|
|
| Analysis of Major Chinese Approved Potato Cultivars for Resistance to Virus with Molecular Markers |
| ZHAO Xing-tao，XU Jian-fei，PANG Wan-fu，BIAN Chun-song，DUAN Shao-guang，LIU Jie，DUAN Yan-feng，JIN Li-ping* |
| Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China |
|
|
|
|
Abstract Ryadg and Rx are 2 important genes with extreme resistance to PVY and PVX in potato（Solanum tuberosum L.）．Marker RYSC3 and Rxsp are closely linked to Ryadg and Rx，respectively．In this paper，190 approved cultivars are screened with markers RYSC3 and Rxsp．The results shows that there are 15 cultivars with marker RYSC3，8 cultivars with marker Rxsp，7 cultivars with marker RYSC3 and Rxsp，which account for 7.9%，4.2% and 3.7% in all cultivars tested，respectively．More than 40% cultivars with band marker RYSC3 or Rxsp are progeny of Neo-tuberosum or materials from CIP，and more than 50% of them are approved after 2001．This study indicates that proportion of cultivars with virus resistance in all ones tested is relatively low．But this proportion is gradually increasing during the recent years．This reflects that we are making progress on potato breeding for virus resistance．
|
|
Received: 29 November 2011
Published: 11 January 2012
|
|
|
|
|
|
|
|
|
