Phenotypic and transcriptome profiling of spikes reveals the regulation of light regimens on spike growth and fertile floret number in wheat

• DOI: 10.1111/pce.14832
• Publication Date: 2024-01-25T09:48:55Z
• Authors: Xiaolei Guo; Zhen Zhang; Junyan Li; Siqi Zhang; Wan Sun; Xuechen Xiao; Zhencai Sun; Xuzhang Xue; Zhimin Wang; Yinghua Zhang
• Keywords: Primordium

The spike growth phase is critical for the establishment of fertile floret (grain) numbers in wheat (Triticum aestivum L.). Then, how to shorten and increase grain number synergistically? Here, we showed high-resolution analyses primordia (FP) number, morphology transcriptomes during under three light regimens. development all FP a could be divided into four distinct stages: differentiation (Stage I), concurrently II), III), polarization IV). Compared short photoperiod, long photoperiod shortened stimulated early flowering by shortening Stage III; however, this reduced assimilate accumulation, resulting loss. Interestingly, supplemented with red time required complete Stages I-II, then raised assimilates supply promoted anther before initiation, thereby increasing III, finally maintained IV until they became florets via predicted dynamic gene network. Our findings proposed regimen, stages candidate regulators that achieved shorter higher wheat.