文献类型： 外文期刊

作者： Wang, R ¹ ; Gao, J ² ; Liang, GH ² ;

作者机构： 1.Kansas State Univ, Dept Agron, Cytogenet Lab, Manhattan, KS 66506 USA

2.Kansas State Univ, Dept Agron, Cytogenet Lab, Manhattan, KS 66506 USA; Hebei Acad Agr & Forestry Sci, Cytogenet Lab, Millet Res Inst, Shijiazhuang 050051, Hebei, Peoples R China

关键词： Setaria italica;aneuploids;fertility;interploidy crosses;phenotype;set of trisomics;transmission rate

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期： 1999 年 118 卷 1 期

页码：

收录情况： SCI

摘要： A complete set of nine primary trisomics(2n + 1)for cv. 'Yugu No. 1' of foxtail millet, Setaria italica (L,) Beauv. (2n = 2x = 18), was identified cytologically from progenies derived from crosses between autotriploids (tn = 3x = 27) and their diploid counterparts. Five autotriploid plants were identified from 2100 seedlings derived from 4x-2x crosses; the reciprocal crosses (2x-4x) failed to produce autotriploids. Autotriploids grew vigorously and were morphologically very similar to diploids. The primary trisomics (2n = 2x = 19) constituted approximate to 32.5% of the total progeny from the 3x-2x crosses, whereas 59.8% of the descendants a ere aneuploids with chromosome numbers ranging from 20 (double trisomics and tetrasomics) to 37 (2n = 4x + 1; or autotetraploid with one additional chromosome). The nine primary trisomics identified were self-fertile; seven had characteristic morphology, whereas trisomics VIII and IX resembled the disomics. The seed set for trisomic V was the lowest (20%), and trisomic Vm the highest (74%). Other aneuploids with 20 or more somatic chromosomes were either self-sterile or partially fertile with various, but low, levels of seed set. Each of the primary trisomics showed its unique transmission rate when self-pollinated: trisomic IX had the highest (45.8%), whereas trisomic V had the: lowest (19.6%) transmission rate.