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Scientia Silvae Sinicae ›› 2009, Vol. 12 ›› Issue (8): 44-49.doi: 10.11707/j.1001-7488.20090808

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Construction of a Dense Genetic Linkage Map and QTL Analysis of Trunk Diameter in Chinese Jujube

Qi Jing1,Dong Zhen2,Mao Yongmin1,Shen Lianying1,Zhang Yuxing1,Liu Jie1,Wang Xiaoling1   

  1. 1.College of Horticulture，Agricultural University of HebeiBaoding 071001； 2.Hebei Womens Vocational CollegeShijiazhuang 050091
  • Received:2008-09-09 Revised:1900-01-01 Online:2009-08-25 Published:2009-08-25
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Abstract:

In this study，AFLP and RAPD markers were used to increase density of the genetic linkage map of Chinese jujube based on a F1 population of 150 individuals derived from the cross between Dongzao (Zizyphus jujuba ‘Dongzao’) and Linyilizao (Zizyphus jujuba ‘Linyilizao’). As a result，a dense genetic linkage map of Chinese jujube was constructed，and it consisted of 15 linkage groups and covered 1 309.4 Cm，including 388 AFLP markers and 35 RAPD markers. The average interval distance was 3.1 Cm. Compared with the previous linkage map，the total length of map increased by 72 Cm，the average interval distance reduced by 0.8 Cm，and the number of intervals with the distance >10 Cm between adjacent markers declined 33%. Based on the newly constructed genetic linkage map，the QTLs for trunk diameter in jujube was also analyzed in this study，and a total of 6 QTLs were identified，and they could explain 38.1%，10.0%，14.4%，10.1%，13.4% and 31.0% phenotypic variation respectively.

Key words: Chinese jujube (Zizyphus jujuba), AFLP marker, RAPD marker, genetic linkage map, trunk diameter, QTL analysis

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