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生育期长度是决定大豆产量的重要因素之一,并与种植纬度、种植季节密切相关。生育期是光周期反应的重要指标,亦是育种主要选择目标性状。大豆是敏感型高温短日作物,适应于高纬度环境的大豆栽培种对光周期必须具有光周期不敏感性。经典遗传学研究表明:4个主要遗传位点E1、E3、E4和E7被证明参与控制这种不敏感性。其中,E1位点是Bernard于1971年正式命名,但由于该基因位于第六号染色体(LG C2)中心粒着丝点附近,遗传重组率极
The length of the growth period is one of the important factors that determine the yield of soybean and is closely related to planting latitude and planting season. The growth period is an important indicator of the photoperiod response and is also the main target trait of breeding. Soybeans are sensitive high-temperature short-day crops. Soybean cultivars adapted to high latitudes must have photoperiod insensitivity to photoperiod. Classical genetic studies have shown that four major genetic loci E1, E3, E4 and E7 have been shown to be involved in controlling this insensitivity. Among them, the E1 site was formally named Bernard in 1971, but because the gene is located near the centromere on the sixth chromosome (LG C2), the rate of genetic recombination