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Effect of light wavelength on soybean growth and development in a context of speed breeding
Crop Science ( IF 2.3 ) Pub Date : 2020-09-10 , DOI: 10.1002/csc2.20327
Derrick Harrison 1 , Marcos Da Silva 1 , Chengjun Wu 1 , Maria De Oliveira 1 , Francia Ravelombola 1 , Liliana Florez‐Palacios 1 , Andrea Acuña 1 , Leandro Mozzoni 1
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Soybean [Glycine max (L.) Merr.] breeding involves crossing and inbreeding for multiple generations to develop genetically stable lines. The long generation times cause early generations to be the major bottleneck in soybean breeding. Here we tested the effect of red and blue light (RB) and full‐spectrum white light (FS), coupled with 12‐h light (29 °C) vs. 12‐h darkness (27 °C) photothermal conditions, on the growth and development of soybean lines and breeding materials of diverse maturity groups (MGs) in a context of speed breeding. We observed that RB light vs. FS light reduced plant height but did not affect vegetative biomass, pods and seeds per plants, nor the ability to meet a minimum of one seed per plant. Overall, the RB treatment reduced the interval planting to physiological maturity by 1.5 d vs. the FS treatment. The period between planting and harvest of mid‐ and late‐maturity soybean ranged from 63 to 81 d, vs. ∼120 d observed in field conditions. Also, days after planting (DAP) to R7 was dependent on soybean MG. The use of RB light, coupled with photothermal conditions herein reported, would allow to advance up to five generations of U.S.‐adapted soybean under a controlled environment instead of the one to three generations currently possible. This methodology is simple and easily scalable, for it maintains stable growing conditions throughout the crop cycle and it allows for simultaneous planting and harvesting within the same growth room. This could have a significant impact in genetic gain of U.S. soybean breeding programs.

中文翻译:

速育条件下光波长对大豆生长发育的影响

大豆[大豆最大[L.] Merr。]育种涉及多代杂交和近交,以开发出遗传稳定的品系。较长的世代时间使早世代成为大豆育种的主要瓶颈。在这里,我们测试了红,蓝光(RB)和全光谱白光(FS)以及12小时光(29°C)与12小时黑暗(27°C)光热条件的影响。速育背景下大豆品种和不同成熟度组(MGs)育种材料的生长和发育。我们观察到RB光照与FS光照降低了植株高度,但没有影响每株植物的营养生物量,豆荚和种子,也没有影响每株植物至少满足一粒种子的能力。总体而言,与FS处理相比,RB处理将播种到生理成熟的间隔缩短了1.5 d。中,后期成熟大豆的播种至收获期为63至81天,而田间条件下为120天左右。同样,R7的播种后天数(DAP)取决于大豆MG。结合本文报道的RB光和光热条件的使用,可以在可控的环境下将适应美国需求的大豆提高至5代,而不是目前的1到3代。这种方法简单易行,因为它可以在整个作物周期内保持稳定的生长条件,并且可以在同一生长室内同时进行种植和收获。这可能会对美国大豆育种计划的遗传增益产生重大影响。播种(DAP)至R7的天数取决于大豆MG。结合本文报道的RB光和光热条件的使用,可以在受控环境下将适应美国气候的大豆提高5代,而不是目前的1到3代。这种方法简单易行,因为它可以在整个作物周期内保持稳定的生长条件,并且可以在同一生长室内同时进行种植和收获。这可能会对美国大豆育种计划的遗传增益产生重大影响。播种(DAP)至R7的天数取决于大豆MG。结合本文报道的RB光和光热条件的使用,可以在受控环境下将适应美国气候的大豆提高5代,而不是目前的1到3代。这种方法简单易行,因为它可以在整个作物周期内保持稳定的生长条件,并且可以在同一生长室内同时进行种植和收获。这可能会对美国大豆育种计划的遗传增益产生重大影响。这种方法简单易行,因为它可以在整个作物周期内保持稳定的生长条件,并且可以在同一生长室内同时进行种植和收获。这可能会对美国大豆育种计划的遗传增益产生重大影响。这种方法简单易行,因为它可以在整个作物周期内保持稳定的生长条件,并且可以在同一生长室内同时进行种植和收获。这可能会对美国大豆育种计划的遗传增益产生重大影响。
更新日期:2020-09-10
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