Crops ›› 2023, Vol. 39 ›› Issue (1): 46-51.doi: 10.16035/j.issn.1001-7283.2023.01.007

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Wide Adaptability Performance and Genetic Analysis of National Certified Wheat Variety Shannong 20 with High and Stable Yield

Wang Yanxun1(), Tian Jichun1,2()   

  1. 1Shandong Tianze Taitian Seed Technology Co.,Ltd., Tai'an 271000, Shandong, China
    2Shandong Agricultural University, Tai’an 271018, Shandong, China
  • Received:2022-03-16 Revised:2022-12-15 Online:2023-02-15 Published:2023-02-22

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Abstract:

Shannong 20 is a wheat variety with multi-resistance, wide adaptability, high and stable yield, which was bred by conventional breeding and molecular marker-assisted selection by Shandong Agricultural University. Shannong 20 was approved by the National Huanghuai South section, North Section, Xinjiang, and Gansu. Shannong 20 related to Elytrigia Elongata and American germplasm shows excellent agronomic traits such as disease resistance, big spike and big grain. By detecting gene function markers or microsatellite markers closely linked to genes, the key genes controlling important agronomic traits were analyzed, the following results were obtained. Shannong 20 hosted powdery mildew-resistance genes (Pm2, Pm24 and Pm30), contained stripe rust-resistance genes (Yr15 and Yr26), leaf rust-resistance gene Lr21 and sheath blight-resistance gene Ses1, which accounted for its field resistances to stripe, leaf rust, and sheath blight disease. Shannong 20 harbored the gene loci of three factors of wheat yield, such as QGw6A-29 and QTaGW4B.4 for grain weight, QGns2B-2 for kernels per spike, QS12D-3 for spike length, QMtw5D-1 and QMtw6A for tillering and spike formation, which were in accordance with its high yield, stable yield and wide adaptability. The study provides valuable information on a wide range of agronomic important genes of Shannong 20, which may facilitate the utilization of it for improving wheat yield and environmental adaptability in further research.

Key words: Shannong 20, Wheat, High yield, Stable yield, Widely adaptation, Functional or linked markers, Genetic analysis

Table 1

Yield and three components in Huanghuai south section"

年度
Year		 试验类别
Experiment type		 试验点数
Plot numbers		 穗数
Spike numbers (×104/hm2)		 穗粒数
Kernels per spike		 千粒重
1000-kernel weight (g)		 平均产量
Average yield (kg/hm2)		 产量增减
Yield(±) (%)
2007-2008 区域试验 20 648.0 32.9 43.1 8473.5 3.90
2008-2009 区域试验 19 687.0 31.8 40.2 8134.5 8.94
2009-2010 生产试验 13 664.5 30.3 45.7 7576.5 5.47

Table 2

Yield and three components in Huanghuai north section"

年度
Year		 试验类别
Experiment type		 试验点数
Plot numbers		 穗数
Spike numbers (×104/hm2)		 穗粒数
Kernels per spike		 千粒重
1000-kernel weight (g)		 平均产量
Average yield (kg/hm2)		 产量较对照
Yield (±) (%)
2008-2009 区域试验 14 687 34.5 40.9 8035.5 5.32
2009-2010 区域试验 14 612 35.7 41.9 7756.5 5.10
2010-2011 生产试验 9 630 35.1 44.6 8547.0 3.60

Fig.1

Salt-resistant performance of Shannong 20 in saline-alkali land"

Fig.2

Detection of polymerized genes/QTLs of resistance to powdery mildew and stripe rust in Shannong 20"

Table 3

Shannong 20 hosted multiple disease resistance genes/QTLs from parents"

品种Variety 白粉病Powdery mildew 条锈病Strip rust 叶锈病Leaf rust
PH82-2-2 Pm2,Pm24,Pm16 Yr15,Yr26,YrTp1 Lr21
954072 Pm30,Pm24 Yr5,Yr24 Lr21
山农20 Shannong 20 Pm2,Pm24,Pm30 Yr15,Yr26 Lr21

Table 4

Identification results of disease resistance inoculation of the main diseases in Shannong 20"

病害
Disease		 年份Year 同期参试266个品种比较
Compared with 266 cultivars tested in the same year
2007-2008 2008-2009
白粉病Powdery mildew I I 仅山农20一个品种
条锈病Strip rust HR I 16.18%品系达此水平
叶锈病Leaf rust 慢锈病 慢锈病 16.18%品系达此水平
纹枯病Sheath blight HS HS 黄淮麦区无免疫和高抗
赤霉病Scab MS HS 黄淮麦区无免疫和高抗

Fig.3

Performance of disease resistance of Shannong 20 in field"

Table 5

Shannong 20 aggregated six excellent genes of grain weight, kernels per spike and spike length from two parents"

品种Variety 粒重Grain weight 分蘖成穗Tillering spike 穗粒数Kernels per spike 穗长Spike length
PH82-2-2 QGw6A-29 QMtw5D-1, QMtw6A
954072 QGw6A-29, QTaGW4B.4 QGns2B-2 qSl2D
山农20 QGw6A-29, QTaGW4B.4 QMtw5D-1, QMtw6A QGns2B-2 QS12D-3
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