文献类型： 外文期刊

作者： Li, Genqiao ¹ ; Boontung, Rungravee ² ; Powers, Carol ¹ ; Belamkar, Vikas ² ; Huang, Tianrong ¹ ; Miao, Fang ¹ ; Baenz ¹ ;

作者机构： 1.Oklahoma State Univ, Dept Plant & Soil Sci, Stillwater, OK 74078 USA

2.Univ Nebraska, Dept Agron & Hort, Lincoln, NE 68583 USA

3.USDA ARS, Wheat Peanut & Other Field Crops Res, 1301 N Western RD, Stillwater, OK 74075 USA

4.Xinjiang Acad Agr Sci, Inst Grain Crops, Urumqi 830091, Peoples R China

5.Northwest A&F Univ, Coll Life Sci, Yangling 712100, Shaanxi, Peoples R China

关键词： Apogee wheat;Flowering genes;Vernalization;Photoperiod;VRN1

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2017 年 18 卷

页码：

收录情况： SCI

摘要： Background: 'Apogee' has a very short life cycle among wheat cultivars (flowering 25 days after planting under a long day and without vernalization), and it is a unique genetic material that can be used to accelerate cycling breeding lines. However, little is known about the genetic basis of the super-short life of Apogee wheat. Results: In this study, Apogee was crossed with a strong winter wheat cultivar 'Overland', and 858 F-2 plants were generated and tested in a greenhouse under constant warm temperature and long days. Apogee wheat was found to have the early alleles for four flowering time genes, which were ranked in the order of vrn-A1 > VRN-B1 > vrn-D3 > PPD-D1 according to their effect intensity. All these Apogee alleles for early flowering showed complete or partial dominance effects in the F2 population. Surprisingly, Apogee was found to have the same alleles at vrn-A1a and vrn-D3a for early flowering as observed in winter wheat cultivar 'Jagger.' It was also found that the vrn-A1a gene was epistatic to VRN-B1 and vrn-D3. The dominant vrn-D3a alone was not sufficient to cause the transition from vegetative to reproductive development in winter plants without vernalization but was able to accelerate flowering in those plants that carry the vrn-A1a or Vrn-B1 alleles. The genetic effects of the vernalization and photoperiod genes were validated in Apogee x Overland F-3 populations. Conclusion: VRN-A1, VRN-B1, VRN-D3, and PPD-D1 are the major genes that enabled Apogee to produce the very short life cycle. This study greatly advanced the molecular understanding of the multiple flowering genes under different genetic backgrounds and provided useful molecular tools that can be used to accelerate winter wheat breeding schemes.