Genetic basis of the very short life cycle of ‘Apogee’ wheat

BMC Genomics

Research Article

P. Stephen Baenziger¹  Rungravee Boontung¹  Vikas Belamkar¹  Carol Powers²  Liuling Yan²  Fang Miao³  Tianrong Huang⁴  Genqiao Li⁵ 

[1] Department of Agronomy and Horticulture, University of Nebraska-Lincoln, 68583, Lincoln, NE, USA;Department of Plant and Soil Sciences, Oklahoma State University, OK74078, Stillwater, USA;Department of Plant and Soil Sciences, Oklahoma State University, OK74078, Stillwater, USA;College of Life Science, Northwest A & F University, 712100, Yangling, Shaanxi, People’s Republic of China;Department of Plant and Soil Sciences, Oklahoma State University, OK74078, Stillwater, USA;Institute of Grain Crops, Xinjiang Academy of Agricultural Sciences, 830091, Urumqi, People’s Republic of China;Department of Plant and Soil Sciences, Oklahoma State University, OK74078, Stillwater, USA;Wheat, Peanut and Other Field Crops Research, USDA-ARS, 1301 N Western RD, 74075-2714, Stillwater, OK, USA;

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

DOI  :  10.1186/s12864-017-4239-8

 received in 2017-05-04, accepted in 2017-10-25,  发布年份 2017

来源: Springer

【 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.ResultsIn this study, Apogee was crossed with a strong winter wheat cultivar ‘Overland’, and 858 F2 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 F3 populations.ConclusionVRN-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.

【 授权许可】

CC BY   
© The Author(s). 2017