Crops ›› 2017, Vol. 33 ›› Issue (6): 45-49.doi: 10.16035/j.issn.1001-7283.2017.06.008

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Analysis of Population Structure and Yield Formation in Two-Line Hybrid Wheat

Zhang Shengquan,Chen Zhaobo,Wang Zheng,Ren Liping,Gao Xinhuan,Ye Zhijie,Zhang Fengting   

  1. Beijing Engineering Research Center for Hybrid Wheat,Beijing 100097,China
  • Received:2017-08-09 Revised:2017-09-26 Online:2017-12-15 Published:2018-08-26
  • Contact: Fengting Zhang

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Abstract:

In order to study the population structure and yield formation characteristics of two-line hybrid wheat, a comparison of 142 hybrid wheat combinations on dynamics of plant population quantity and yield components was conducted under field condition using common wheat as the control. The results showed that two-line hybrid wheat yield showed obvious advantages and could increase the yield by as much as 17.3%, the percentage of increased combinations compared to all of the tested combinations was 27.5%. Hybrid wheat had a prominent advantage of tillering and the tillering peak mainly occurred before wintering, and it was helpful to construct a reasonable population basis by promoting the tillering of hybrid wheat before winter. Since spike number and 1000-grain weight contributed significantly to the yield, it was important to further tap the potential of spike number to expand sink capacity and to realize more significant increase. In order to further improve the yield of hybrid wheat, we should focus on the combination selection with good characteristics of higher sink capacity and stronger recoverability.

Key words: Two-line hybrid wheat, Population structure, Yield formation

Table 1

Growth rate of yield of 142 combinations compared with Jing411 %"

组合Combination 增产率Growth rate 组合Combination 增产率Growth rate 组合Combination 增产率
Growth rate		 组合
Combination		 增产率
Growth rate		 组合Combination 增产率
Growth rate
BH4096 17.3 BH4049 2.4 BH4069 -5.6 BH3621 -10.8 BH1271 -19.1
BH4073 15.0 BH4514 2.4 BH1558 -5.7 BH6015 -11.4 BH528 -19.1
BH1273 14.4 BH6058 2.2 BH9N12 -6.1 BH4042 -11.5 BH28G -19.2
BH36Y68 13.3 BH6069 1.9 BH1207 -6.4 BH4521 -11.5 BH6001 -20.1
BH3680 12.8 BH9369 1.7 BH14Y2 -6.5 BH40GL -11.9 BH2821 -20.1
BH4007 12.2 BH4058 0.6 BH4086 -6.7 BH5211 -11.9 BH6064 -20.3
BH1710 12.0 BH12C9 0.6 BH4089 -6.8 BH3664 -12.5 BH6012 -20.9
BHLF58 11.5 BH6073 0.5 BH4614 -6.8 BH1259 -12.6 BH1212 -20.9
BH1299 11.1 BH12S5 0.2 BH1764 -7.1 BH1073 -12.8 BH3612 -22.3
BH4568 11.0 BH9312 -0.3 BH4028 -7.6 BH6010 -13.0 BH4008 -22.6
BH6096 10.4 BH3607 -0.6 BH4011 -7.8 BH1499 -14.4 BH4020 -22.8
BH6188 10.0 BH4512 -0.6 BH3608 -7.9 BH1715 -14.5 BH4021 -23.4
BH9342 8.6 BH1896 -1.2 BH9M20 -7.9 BH1211 -14.7 BH6008 -24.5
BH4569 8.6 BH6061 -1.3 BH3615 -8.1 BH4091 -14.8 BH1232 -25.0
BHLF69 8.1 BH4068 -1.4 BH6029 -8.1 BH6412 -15.0 BH1241 -25.2
BH1214 7.5 BH12101 -1.4 BH6420 -8.2 BH5249 -15.4 BHL12 -25.5
BH1215 6.7 BH3682 -1.7 BH1720 -8.3 BH4015 -15.5 BH1257 -26.7
BH1249 6.7 BH12F3 -2.0 BH12H8 -8.5 BH4088 -16.1 BH2059 -27.1
BH4064 6.3 BH6421 -2.5 BHL21 -8.7 BH403 -16.1 BH2058 -30.1
BH12DS 6.0 BH1213 -2.7 BH6014 -9.2 BH20G -16.2 BH5208 -30.8
BH1288 5.9 BH9301 -2.8 BH1204 -9.4 BH1722 -16.6 BH2820 -32.1
BH2549 5.9 BHLG -2.8 BH1252 -9.7 BH3658 -16.9 BH4012 -32.4
BH4061 5.7 BH12Y3 -3.2 BH6021 -10.0 BH2569 -17.0
BH9310 4.6 BH4001 -3.4 BH1711 -10.0 BH2520 -17.0
BH60FY 4.5 BH6007 -3.4 BHL59 -10.0 BH1411 -17.0
BH1788 4.4 BH1410 -4.7 BH5229 -10.1 BH17G -17.2
BH4013 4.1 BH4071 -5.0 BH66G -10.3 BH15G -17.3
BH1264 4.1 BH6020 -5.0 BH1758 -10.3 BH4010 -17.4
BH60GL 3.8 BH6011 -5.0 BH40G -10.5 BH1701 -17.6
BH1221 2.6 BH4572 -5.6 BH6088 -10.7 BH1026 -18.7

Table 2

Dynamics of hybrid wheat plant population quantity 万/hm2"

组合Combination 基本苗数(×106/hm2)
Basic seedling number		 茎数Tiller number (×106/hm2) 成穗率(%)
Reproductive ear percentage
冬前
Overwinter		 返青期
Regreening		 起身期
Raising		 成熟期
Maturity
增产率≥15% Growth rate≥15% 3.270a 12.945a 11.610a 14.385a 6.960a 48.4a
10%≤增产率<15% 10%≤growth rate<15% 3.270a 11.175b 10.485a 13.425a 5.985ab 44.6a
5%≤增产率<10% 5%≤growth rate<10% 3.375a 11.385b 10.515a 13.320a 5.805b 43.6a
增产率>0 Growth rate>0 3.435a 11.505b 10.695a 13.110a 5.700b 43.5a
全部组合平均Average of all combinations 3.525a 11.370b 9.975a 12.315b 5.475c 44.5a
京411(CK) Jin 411(control) 3.465a 10.665b 10.575a 14.325a 5.625b 39.3b

Table 3

The characteristics of yield components of hybrid wheat"

组合Combination 成穗数
Spike number
(×106/hm2)		 小穗数
Spikelet
number		 穗粒数
Grain number
per spikelet		 库容量
Sink capacity
(×106/hm2)		 千粒重
1000-grain
weight (g)		 子粒产量
Grain yield
(kg/hm2)
增产率≥15% Growth rate≥15% 6.960a 19.1a 30.4a 211.6a 43.2a 7 378.5a
10%≤增产率<15% 10%≤growth rate<15% 5.985b 19.1a 30.9a 184.9b 43.5a 7 080.0a
5%≤增产率<10% 5%≤growth rate<10% 5.805b 19.2a 31.7a 184.0b 44.3a 6 910.5b
增产率>0 Growth rate>0 5.730bc 19.1a 31.7a 181.6b 44.4a 6 721.5b
全部组合平均Average of all combinations 5.475c 19.1a 32.1a 175.7b 43.4a 5 839.5c
京411(CK) Jin 411(control) 5.625c 18.9a 30.2a 169.9b 39.3b 6 288.0c

Table 4

The correlation analysis of yield components and yield of hybrid wheat"

项目Item 成穗数Spike number 穗粒数Grain number per panicle 千粒重1000-grain weight 子粒产量Grain yield
成穗数Spike number 0.4828 0.7057 0.9323
穗粒数Grain number per panicle 0.8151 0.7616
千粒重1000-grain weight 0.8821
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