首页|Analysis of the independent-and interactive-photo-thermal effects on soybean lfowering
Analysis of the independent-and interactive-photo-thermal effects on soybean lfowering
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国家科技期刊平台
NETL
NSTL
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Soybean (Glycine max (L.) Merr.) is a typical short-day and warm season plant, and the interval between emergence and lfowering has long been known to be regulated by environmental factors, primarily photoperiod and temperature. While the effects of photoperiod and temperature on soybean lfowering have been extensively studied, a dissection of the com-ponent photo-thermal effects has not been documented for Chinese germplasm. Our objective of the current study was to evaluate the independent-and interactive-photo-thermal responses of 71 cultivars from 6 ecotypes spanning the soy-bean production regions in China. These cultivars were subjected in pot experiments to different temperature regimes by planting in spring (low temperature (LT)) and summer (high temperature (HT)), and integrating with short day (SD, 12 h), natural day (ND, variable day-length), and long day (LD, 16 h) treatments over two years. The duration of the vegetative phase from emergence to ifrst bloom (R1) was recorded, and the photo-thermal response was calculated. The outcome of this characterization led to the fol owing conclusions:(1) There were signiifcant differences in photo-thermal response among the different ecotypes. High-latitude ecotypes were less sensitive to the independent-and interactive-photo-thermal effects than low-latitude ecotypes;and (2) there was an interaction between photoperiod and temperature, with the effect of photoperiod on thermal sensitivity being greater under the LD than the SD condition, and with the effect of temperature on photoperiodic sensitivity being greater under the LT than the HT condition. The strengths and limitations of this study are discussed in terms of implications for current knowledge and future research directions. The study provides better understanding of photo-thermal effects on lfowering in soybean genotypes from different ecotypes throughout China and of the implications for their adaptation more broadly.
Key Laboratory of Soybean Biology Beijing, Ministry of Agriculture/Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
China Agricultural Research SystemChinese Academy of Agricul-tural Sciences Innovation Project
国家科技期刊平台
NSTL
万方数据
