Outcrossing and hybridization in wild and cultivated foxtail millets: consequences for the release of transgenic crops

被引:62
作者
Till-Bottraud, I. [1 ]
Reboud, X. [1 ]
Brabant, P. [2 ]
Lefranc, M. [1 ]
Rherissi, B. [1 ]
Vedel, F. [3 ]
Darmency, H. [4 ]
机构
[1] Univ Paris 11, CNRS, UA 121, Lab Evolut & Syst, F-91405 Orsay, France
[2] CNRS INRA UPS, F-91190 Gif Sur Yvette, France
[3] Univ Paris 11, CNRS, UA 115, Lab Genet Mol Plantes, F-91405 Orsay, France
[4] INRA, Malherbol Lab, F-21034 Dijon, France
关键词
Species complex; Outcrossing; Hybridization; Chloroplast DNA;
D O I
10.1007/BF00232954
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Outcrossing rates within the wild green foxtail, Setaria viridis, and the cultivated foxtail millet, S. italica, are very low. However, spontaneous interspecific hybridizations in the experimental garden occurred in both directions at rates ranging from 0.002% to 0.6% according to plant density and distance between parents. Offtypes found in farmers' fields where foxtail millet is cultivated were shown to have originated from such interspecific crosses. Differences in the EcoR1 patterns of chloroplast DNA between cultivated and wild plants indicated that reciprocal crosses do occur in the field. These findings indicate that even a largely selfing cultivated species may exchange genetic information with wild relatives at rates that may cause problems if transgenic cultivars are released.
引用
收藏
页码:940 / 946
页数:7
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