Characterization of a wheat-Thinopyrum bessarabicum (T2JS-2BS center dot 2BL) translocation line

文献类型： 外文期刊

第一作者： Qi, Zengjun

作者： Qi, Zengjun;Du, Pei;Qian, Baoli;Zhuang, Lifang;Chen, Huafeng;Chen, Tingting;Shen, Jian;Guo, Jie;Feng, Yigao;Pei, Ziyou

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关键词： DNA marker;Gene Name;barley Ppd-H1 gene [Gramineae];Triticum aestivum BF483211 gene [Gramineae];Triticum aestivum BE471132 gene [Gramineae];Triticum aestivum BE606324 gene [Gramineae];Triticum aestivum BE500206 gene [Gramineae];disease resistance;salinity tolerance;genetic resource;crop improvement;translocation breakpoint;fertile spikes per plant

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

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收录情况： SCI

摘要： Thinopyrum bessarabicum (2n = 2x = 14, JJ or (EEb)-E-b) is an important genetic resource for wheat improvement due to its salinity tolerance and disease resistance. Development of wheat-Th. bessarabicum translocation lines will facilitate its practical utilization in wheat improvement. In this study, a novel wheat-Th. bessarabicum translocation line T2JS-2BS center dot 2BL, which carries a segment of Th. bessarabicum chromosome arm 2JS was identified and further characterized using sequential chromosome C-banding, genomic in situ hybridization (GISH), dual-color fluorescent in situ hybridization (FISH) and DNA markers. The translocation breakpoint was mapped within bin C-2BS1-0.53 of chromosome 2B through marker analysis. Compared to the Chinese Spring (CS) parent and to CS-type lines, the translocation line has more fertile spikes per plant, longer spikes, more grains per spike and higher yield per plant, which suggests that the alien segment carries yield-related genes. However, plants with the translocation are also taller, head later and have lower 1,000-kernel weight than CS or CS-type lines. By using markers specific to the barley photoperiod response gene Ppd-H1, it was determined that the late heading date was conferred by a recessive allele located on the 2JS segment. In addition, four markers specific for the translocated segment were identified, which can be used for marker-aided screening.

分类号： R394

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