Combining Ability Analysis of Grain Weight per Plant and Nitrogen Fertilizer Agronomic Efficiency of Maize Inbred Line Under Low Nitrogen Stress

doi:10.11924/j.issn.1000-6850.casb2025-0025

Abstract

Abstract:

To screen maize inbred lines with high combining ability for single plant grain weight and nitrogen fertilizer agronomic efficiency, using 15 inbred lines as materials, 56 hybrid combinations were constructed according to the NCⅡ mating design. Under low nitrogen stress, the general combining ability of inbred lines for single plant grain weight and nitrogen fertilizer agronomic efficiency were estimated, as well as the specific combining ability of hybrid combinations. The results indicated that the inbred lines with positive general combining ability effects for single plant grain weight were WZ14212, WZ1718-2, 1734A10, Z7A-21, 1734B325, 1735A2 and WZ853, with effect values of 3.97, 2.86, 2.55, 2.13, 1.14, 0.75 and 0.74, respectively. There were 8 hybrid combinations with the special combining ability effect values greater than 7, ranging from 7.46 to 10.64. The inbred lines showed positive general combining ability for nitrogen fertilizer agronomic efficiency were WZ14212, 1734A10, WZ853, 195-73, WZ1718-2 and 1735A2, with effect values of 9.96, 5.06, 4.63, 2.45, 1.78 and 1.55, respectively. There were 11 hybrid combinations with the special combining ability effect values greater than 10, ranging from 10.95 to 24.86. Correlation analysis showed that under low nitrogen stress, there was a significant positive correlation between the single plant grain weight of hybrid combinations and the general combining ability of the single plant grain weight with male parent inbred line, r were 0.2921^*; there were highly significant and significant positive correlations between nitrogen fertilizer agronomic efficiency of hybrid combinations and the general combining ability of nitrogen fertilizer agronomic efficiency with its diploid inbred lines, r were 0.3848^** and 0.3289^*, respectively; and there were highly significant positive correlations between both the single plant grain weight and agronomic efficiency of nitrogen fertilizer in hybrid combinations with their total combining ability effects, r were 0.9669^** and 0.9455^**, respectively. The results suggested that WZ14212, WZ1718-2, Z7A-21, 1734A10, 1734B325, 1735A2 and WZ853 could be inbred lines developing hybrid combinations with high single plant grain weight and nitrogen fertilizer agronomic efficiency in maize breeding programs.

Key words: maize inbred lines, low nitrogen stress, grain weight per plant, nitrogen fertilizer agronomic efficiency, combining ability

XIANG Zhenfan, HUO Chuan, FENG Yunchao, YANG Lian, HUANG Meixia, YAN Qingjiu, HUO Shiping. Combining Ability Analysis of Grain Weight per Plant and Nitrogen Fertilizer Agronomic Efficiency of Maize Inbred Line Under Low Nitrogen Stress[J]. Chinese Agricultural Science Bulletin, 2025, 41(20): 1-9.

Figures/Tables 5

References 30

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编号	名称	编号	名称	编号	名称
1	WZ0714×WZ853	20	WZ15Y11×1735A2	39	195-73×1734A10
2	WZ0714×WZ0910	21	WZ15Y11×1735B20	40	195-73×1734B325
3	WZ0714×WZ132018	22	WZ1718-2×WZ853	41	195-73×1735A2
4	WZ0714×1734A10	23	WZ1718-2×WZ0910	42	195-73×1735B20
5	WZ0714×1734B325	24	WZ1718-2×WZ132018	43	XZ966-14×WZ853
6	WZ0714×1735A2	25	WZ1718-2×1734A10	44	XZ966-14×WZ0910
7	WZ0714×1735B20	26	WZ1718-2×1734B325	45	XZ966-14×WZ132018
8	WZ14212×WZ853	27	WZ1718-2×1735A2	46	XZ966-14×1734A10
9	WZ14212×WZ0910	28	WZ1718-2×1735B20	47	XZ966-14×1734B325
10	WZ14212×WZ132018	29	WZ1736-34×WZ853	48	XZ966-14×1735A2
11	WZ14212×1734A10	30	WZ1736-34×WZ0910	49	XZ966-14×1735B20
12	WZ14212×1734B325	31	WZ1736-34×WZ132018	50	Z7A-21×WZ853
13	WZ14212×1735A2	32	WZ1736-34×1734A10	51	Z7A-21×WZ0910
14	WZ14212×1735B20	33	WZ1736-34×1734B325	52	Z7A-21×WZ132018
15	WZ15Y11×WZ853	34	WZ1736-34×1735A2	53	Z7A-21×1734A10
16	WZ15Y11×WZ0910	35	WZ1736-34×1735B20	54	Z7A-21×1734B325
17	WZ15Y11×WZ132018	36	195-73×WZ853	55	Z7A-21×1735A2
18	WZ15Y11×1734A10	37	195-73×WZ0910	56	Z7A-21×1735B20
19	WZ15Y11×1734B325	38	195-73×WZ132018

编号	名称	编号	名称	编号	名称
1	WZ0714×WZ853	20	WZ15Y11×1735A2	39	195-73×1734A10
2	WZ0714×WZ0910	21	WZ15Y11×1735B20	40	195-73×1734B325
3	WZ0714×WZ132018	22	WZ1718-2×WZ853	41	195-73×1735A2
4	WZ0714×1734A10	23	WZ1718-2×WZ0910	42	195-73×1735B20
5	WZ0714×1734B325	24	WZ1718-2×WZ132018	43	XZ966-14×WZ853
6	WZ0714×1735A2	25	WZ1718-2×1734A10	44	XZ966-14×WZ0910
7	WZ0714×1735B20	26	WZ1718-2×1734B325	45	XZ966-14×WZ132018
8	WZ14212×WZ853	27	WZ1718-2×1735A2	46	XZ966-14×1734A10
9	WZ14212×WZ0910	28	WZ1718-2×1735B20	47	XZ966-14×1734B325
10	WZ14212×WZ132018	29	WZ1736-34×WZ853	48	XZ966-14×1735A2
11	WZ14212×1734A10	30	WZ1736-34×WZ0910	49	XZ966-14×1735B20
12	WZ14212×1734B325	31	WZ1736-34×WZ132018	50	Z7A-21×WZ853
13	WZ14212×1735A2	32	WZ1736-34×1734A10	51	Z7A-21×WZ0910
14	WZ14212×1735B20	33	WZ1736-34×1734B325	52	Z7A-21×WZ132018
15	WZ15Y11×WZ853	34	WZ1736-34×1735A2	53	Z7A-21×1734A10
16	WZ15Y11×WZ0910	35	WZ1736-34×1735B20	54	Z7A-21×1734B325
17	WZ15Y11×WZ132018	36	195-73×WZ853	55	Z7A-21×1735A2
18	WZ15Y11×1734A10	37	195-73×WZ0910	56	Z7A-21×1735B20
19	WZ15Y11×1734B325	38	195-73×WZ132018

变异来源	自由度	单株粒重	氮肥农学效率
区组间	1	1.09	0.57
组合间	55	500.66^**	260.48^**
母本间	7	703.03^**	376.39^**
父本间	6	561.00^**	291.89^**
母×父	42	458.31^**	236.69^**
误差	55	19.54	10.17

变异来源	自由度	单株粒重	氮肥农学效率
区组间	1	1.09	0.57
组合间	55	500.66^**	260.48^**
母本间	7	703.03^**	376.39^**
父本间	6	561.00^**	291.89^**
母×父	42	458.31^**	236.69^**
误差	55	19.54	10.17

母本	父本
母本	WZ853	WZ0910	WZ132018	1734A10	1734B325	1735A2	1735B20	GCA
WZ0714	-3.67 bcdAB	-0.09 ab	2.34 abcABC	1.33 abAB	3.59 abAB	1.68 abAB	-4.31 a	-0.65
WZ14212	-0.74 abcAB	9.87 a	-11.47 dC	0.45 abcAB	2.00 abAB	1.48 abAB	-1.46 a	3.97 ^**
WZ15Y11	-14.64 dB	7.52 a	10.07 aA	-8.46 bcAB	9.84 aA	2.14 abAB	-2.32 a	-3.07
WZ1718-2	-5.26 cdAB	-0.21 ab	-7.43 bcdABC	1.03 abAB	6.20 abAB	-0.70 abAB	2.50 a	2.86 ^**
WZ1736-34	8.94 abA	1.57 ab	8.39 aAB	-12.83 cB	1.77 abAB	-11.16 bB	6.15 a	-2.08
195-73	5.50 abcA	-7.23 b	5.24 abABC	6.03 aA	-13.15 cB	7.46 aA	-3.05 a	-0.59
XZ966-14	-1.91 abcdAB	-2.69 ab	2.64 abcABC	6.07 aA	-6.87 bcAB	3.86 aAB	2.40 a	-2.58
Z7A-21	10.64 aA	3.67 ab	-9.20 cdBC	2.45 abAB	-5.14 bcAB	-5.91 abAB	0.60 a	2.13 ^*
GCA	0.74 ^*	-4.46	-0.38	2.55 ^**	1.14 ^*	0.75 ^*	-0.33	/