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Acta Agronomica Sinica ›› 2024, Vol. 50 ›› Issue (12): 3013-3024.doi: 10.3724/SP.J.1006.2024.44060

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

Effect of allelic combinations of soybean maturity loci E1/E2/E3/E4 on latitude adaptation

FANG Ran1(), YUAN Li-Mei1, WANG Yu-Lin1, LU Si-Jia1,2, KONG Fan-Jiang1,2, LIU Bao-Hui1,2,*(), KONG Ling-Ping1,2,*()   

  1. 1College of Life Sciences, Guangzhou University / Innovative Research Center of Molecular Genetics and Evolution, Guangzhou 510006, Guangdong, China
    2Guangdong Key Laboratory of Plant Adaptation and Molecular Design, Guangzhou 510006, Guangdong, China
  • Received:2024-04-12 Accepted:2024-08-15 Online:2024-12-12 Published:2024-08-29
  • Contact: *E-mail: liubh@gzhu.edu.cn; E-mail: lpkong@gzhu.edu.cn
  • Supported by:
    Youth Found of National Natural Science Foundation of China(31901569)

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Abstract:

Soybean, as an important oil crop, is one of the main sources of high-quality protein and edible oil. Soybean yield and seed quality are closely related to growth-period traits, which are mainly controlled by a series of genes associated with the growth period. In this study, 16 near-isogenic lines (NILs) of E1-E4 were developed using Harosoy as the genetic background and were planted in experimental fields in Shijiazhuang and Hefei. The growth period, seed quality, and yield traits were investigated to understand the adaptability of different combinations of E1-E4 mutants to mid-latitude planting areas. The results showed that the 16 NILs had different photoperiod sensitivities and flowering times. WT and e4 NILs were unsuitable for planting in Shijiazhuang due to late flowering and low yield, while all NILs matured normally when planted in Hefei. Different allelic combinations of E1-E4 also affected plant height, node length, yield per plant, and seed quality. We found that e3 or e4 mutations could lead to early flowering under long-day conditions and simultaneously induce a shading response, resulting in taller plants and longer node lengths. We measured the protein, oil, and sucrose content of the seeds and found that the seeds of WT could not mature normally, exhibiting the lowest oil content and the highest sucrose content. Overall, seeds from the other NILs, when planted in Shijiazhuang, showed higher oil and sucrose content compared to those planted in Hefei but lower protein content. Therefore, to evaluate the latitude adaptability of soybean cultivars, it is necessary to comprehensively examine the effects of growth-period genes on photoperiod sensitivity, seed quality, and yield.

Key words: soybean, growth period, yield, seed quality, adaptability

Table 1

E1-E4 NILs with Harosoy as genetic background"

编号
Number		 基因型
Genotype		 类型
Type		 编号
Number		 基因型
Genotype		 类型
Type
1 E1, E2, E3, E4 野生型 Wild type (WT) 9 e1, E2, e3, E4 e1e3
2 E1, e2, E3, E4 e2 10 e1, E2, E3, e4 e1e4
3 E1, E2, e3, E4 e3 11 e1, e2, E3, E4 e1e2
4 E1, E2, E3, e4 e4 12 e1, e2, e3, E4 e1e2e3
5 e1, E2, E3, E4 e1 13 E1, e2, e3, e4 e2e3e4
6 E1, e2, e3, E4 e2e3 14 e1, e2, E3, e4 e1e2e4
7 E1, e2, E3, e4 e2e4 15 e1, E2, e3, e4 e1e3e4
8 E1, E2, e3, e4 e3e4 16 e1, e2, e3, e4 e1e2e3e4

Table 2

Primers for identification of E1-E4 genotypes in NILs"

基因
Gene		 变异类型
Variation type		 引物序列
Primer sequence (5°-3°)		 标记方法
Marker type		 限制性内切酶
Restriction enzyme		 参考文献
Reference
E1 e1 E1-NS: AACACTCAAAACACTCAAATTAAGCC
E1-RV: TCCGATCTCATCACCTTTCC		 dCAPS Hinf I [8]
E2 e2 E2-dcap-fw: GAAGCCCATCAGAGGCATGTCTTATT
E2-dcap-rv: GAGGCAGAGCCAAAGCCTAT		 dCAPS Dra I [10,31]
E3 e3 E3_08557FW: TGGAGGGTATTGGATGATGC
E3Ha_1000RV: CGGTCAAGAGCCAACATGAG
E3T_0716RV: GTCCTATACAATTCTTTACGACG		 FLP [32]
E4 e4 PhyA2-For (PhyATHF3): AGACGTAGTGCTAGGGCTAT
PhyA2-Rev/E4 (1260R): GCATCTCGCATCACCAGATCA
PhyA2-Rev/e4 (TSR): GCTCATCCCTTCGAATTCAG		 FLP [12]

Fig. 1

Results of E1-E4 genotypes identification in Harosoy NILs A-D represent the E1-E4 genotyping results of 16 NILs in Table 1, respectively; M: marker, 2000 bp DNA ladder."

Fig. 2

Statistics analysis of the R1 stage of all NILs A, B represent the statistical and analytical results of the R1 stage for NILs planted in Shijiazhuang and Hefei, respectively. In the chart, the variance analysis outcomes compared with the wild-type dataset are depicted, and *, **, and *** represent significant differences at the 0.05, 0.01, and 0.001 probability levels, respectively. DAE: days after emergence (d)."

Fig. 3

Statistical and analytical result of node number and plant height in NILs A, B represent the data and analysis of node number and plant height for field materials in Shijiazhuang; C, D is the result of Hefei experimental field. In the chart, the variance analysis outcomes compared with the wild-type dataset are depicted, and *, **, and *** represent significant differences at the 0.05, 0.01, and 0.001 probability levels, respectively."

Fig. 4

Comparison of seed weight per plant in NILs A, B represent the statistics and analysis results of seed weight per plant of NILs planted in Shijiazhuang and Hefei, respectively. In the chart, the variance analysis outcomes compared with the wild- type dataset are depicted, and *, **, and *** represent significant differences at the 0.05, 0.01, and 0.001 probability levels, respectively."

Fig. 5

Plant growth status of wild type and e1/e2/e3/e4 in NILs A, B: wild type (WT) and e1e2e3e4 in NILs were planted in Shijiazhuang experimental field, and the plant morphology was obtained at harvest, respectively; C, D: plant morphology of WT and e1e2e3e4 in NILs at harvest stage in Hefei experimental field, respectively. The bar is 5 cm."

Fig. 6

Yield related traits of e3/E4 and e3/e4 mutants planted under different photoperiod conditions A-C: the e3/E4 and e3/e4 mutants, created using CRISPR-Cas9 technology with Willams_82 as the genetic background, were planted in a 20 h light/4 h dark incubator. After maturity, plant height, node number, average node length, branch number, seed number, and seed weight per plant were statistically analyzed. Plant morphology at harvest stage were shown here; A represents the results of the variance analysis comparing e3/E4 and e3/e4, with the P-value obtained through a one-way analysis of variance (One-way ANOVA); D-E: Willams_82 and e3/e4 mutants were planted in a 16 h light/8 h dark incubator. After flowering, data related to plant height, node number, average node length, yield per plant were statistically analyzed, and plant morphology were shown; D denotes the outcomes of the variance analysis in comparison with the wild-type data, where the P-value is derived through a one-way analysis of variance (One-way ANOVA)."

Fig. 7

Comparison of seed quality traits in NILs A-C illustrate the statistical and analytical results of protein, oil and sucrose content seed quality traits of all NILs harvested in Shijiazhuang, respectively; D-F represent seed quality results of the NILs harvested in Hefei. In the chart, the variance analysis outcomes compared with the wild-type dataset are depicted, *, **, and *** represent significant differences at the 0.05, 0.01, and 0.001 probability levels, respectively."

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