Response of Different Maize Genotypes to Low Nitrogen Stress and Trait Selection of Low Nitrogen Tolerant Varieties

doi:10.11924/j.issn.1000-6850.casb2023-0416

Abstract

Abstract:

In order to screen out the maize varieties with low-nitrogen tolerance, and provide the technologies for identifying and screening low-nitrogen-resistant corn varieties, 36 corn cross combinations were used as test materials, the phenotypic value of genotypic agronomic traits was determined under the condition that the amount of nitrogen used was reduced by 70% compared to the normal amount of nitrogen applied. Based on the phenotypic value, the comprehensive coefficient of low nitrogen stress was calculated, and then the genotype's ability to low nitrogen resistance was evaluated. The results showed that there were significant or very significant differences in the performance of most agronomic traits among different genotypes under low nitrogen stress. The comprehensive coefficient of low nitrogen stress varied greatly among 36 genotypes, with a maximum value of 1.0319, a minimum value of -0.1139, and an average of 0.4506. There were 6 and 4 genotypes with very significantly and significantly greater coefficients than the average, respectively; 16 genotypes had no significantly different from the average; there were 2 and 8 genotypes with significantly and very significantly smaller coefficients than the average, respectively. Genotypes with extremely significant and significantly greater coefficients than the average were rated as varieties with strong and stronger low-nitrogen resistances. Vigorous growth, higher plants, and wide ear leaves could be used as important characteristics for selecting low-nitrogen-resistant varieties under low-nitrogen stress.

Key words: maize, genotype, low nitrogen tolerance, comprehensive coefficient

PENG Chaoying, HUO Chuan, XIE Wen, XIANG Zhenfan, HUO Shiping. Response of Different Maize Genotypes to Low Nitrogen Stress and Trait Selection of Low Nitrogen Tolerant Varieties[J]. Chinese Agricultural Science Bulletin, 2024, 40(15): 19-28.

Figures/Tables 6

References 36

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代号	组合名称	代号	组合名称	代号	组合名称
1	155-131111×144-411111	13	1832-211121×085-32121	25	1736-24311×1320-18-41321
2	1736-34234×华优168F	14	1832-734211×1320-18-41311	26	1736-71211×1320-18-41321
3	15Y1-823111×华优168F	15	1832-735311×1320-18-41311	27	1744-10-31111×142-12-41111
4	1736-243121×华优168F	16	1736-22121×85F-13-26121	28	1736-71211×14Y20-21-11111
5	1736-231111×华优168F	17	1832-91112×85F-13-26121	29	098-121521×1625-11213
6	1620-641111×华优168F	18	1320-18-41321×1736-342341	30	1736-213111×1640-911211
7	142-12-41111×1891-11222	19	1734B32-51112×1736-342341	31	071-41322×1735B19-221113
8	1620-641111×13HY19	20	1734A-921111×1736-342341	32	071-41322×1838-311311
9	071-41322×1735B20-111121	21	1735B10-111112×098-121521	33	1320-18-41311×1871-42121
10	1736-71211×085-32121	22	1872B-22111×098-121521	34	286-4×1620-222211
11	1832-81121×085-32121	23	1735B20-111211×098-121521	35	1735A-36-2211×Z1A-411221
12	1620-641111×085-32121	24	Z7A-13-11131×098-121521	36	1736-24311×1320-18-41321

代号	组合名称	代号	组合名称	代号	组合名称
1	155-131111×144-411111	13	1832-211121×085-32121	25	1736-24311×1320-18-41321
2	1736-34234×华优168F	14	1832-734211×1320-18-41311	26	1736-71211×1320-18-41321
3	15Y1-823111×华优168F	15	1832-735311×1320-18-41311	27	1744-10-31111×142-12-41111
4	1736-243121×华优168F	16	1736-22121×85F-13-26121	28	1736-71211×14Y20-21-11111
5	1736-231111×华优168F	17	1832-91112×85F-13-26121	29	098-121521×1625-11213
6	1620-641111×华优168F	18	1320-18-41321×1736-342341	30	1736-213111×1640-911211
7	142-12-41111×1891-11222	19	1734B32-51112×1736-342341	31	071-41322×1735B19-221113
8	1620-641111×13HY19	20	1734A-921111×1736-342341	32	071-41322×1838-311311
9	071-41322×1735B20-111121	21	1735B10-111112×098-121521	33	1320-18-41311×1871-42121
10	1736-71211×085-32121	22	1872B-22111×098-121521	34	286-4×1620-222211
11	1832-81121×085-32121	23	1735B20-111211×098-121521	35	1735A-36-2211×Z1A-411221
12	1620-641111×085-32121	24	Z7A-13-11131×098-121521	36	1736-24311×1320-18-41321

变异来源	自由度	苗期株高	成株株高	成株穗位高	穗位叶长	穗位叶宽	最大叶面积	穗位叶叶绿素含量	成株茎粗
重复间	1	8.36	437.43	133.77	37.62	0.71	5456.23	14.13	0.01
基因型间	35	45.18	5123.96^**	1763.29^**	52.05	6.45^**	22336.23^**	418.38^**	0.02
误差	35	74.54	440.65	164.66	50.30	0.97	3767.71	16.16	0.02
变异来源	自由度	功能叶片数	穗长	穗粗	秃尖长度	穗行数	行粒数	百粒重	单株粒重
重复间	1	0.84	2.74	0.29	0.42	2.96	7.11	724.54	1056.40
基因型间	35	1.08	17.60^**	0.70^**	0.67^*	7.48^*	61.24^**	848.23^*	7095.38^**
误差	35	0.89	6.40	0.27	0.33	3.45	18.79	470.52	1323.57

变异来源	自由度	苗期株高	成株株高	成株穗位高	穗位叶长	穗位叶宽	最大叶面积	穗位叶叶绿素含量	成株茎粗
重复间	1	8.36	437.43	133.77	37.62	0.71	5456.23	14.13	0.01
基因型间	35	45.18	5123.96^**	1763.29^**	52.05	6.45^**	22336.23^**	418.38^**	0.02
误差	35	74.54	440.65	164.66	50.30	0.97	3767.71	16.16	0.02
变异来源	自由度	功能叶片数	穗长	穗粗	秃尖长度	穗行数	行粒数	百粒重	单株粒重
重复间	1	0.84	2.74	0.29	0.42	2.96	7.11	724.54	1056.40
基因型间	35	1.08	17.60^**	0.70^**	0.67^*	7.48^*	61.24^**	848.23^*	7095.38^**
误差	35	0.89	6.40	0.27	0.33	3.45	18.79	470.52	1323.57

性状	成株株高	成株穗位高	最大叶面积	穗位叶叶绿素含量	穗位叶宽	穗长	穗粗	秃尖长度	穗行数	行粒数	百粒重	单株粒重
成株株高	0.3443	0.8157^**	-0.0381	0.2092	-0.1278	0.2578	-0.0076	0.0086	0.4295^**	0.1219	0.0024	0.0641
成株穗位高		-0.3670	-0.2219	-0.0921	-0.2236	0.0568	0.0328	-0.0357	0.4384^**	-0.0181	-0.1323	-0.0605
最大叶面积			-0.2580	0.1987	0.5297^**	0.3503^*	0.0865	-0.0299	-0.0866	0.1822	-0.1120	-0.0884
穗位叶叶绿素含量				-0.0327	0.2194	0.0970	0.0553	-0.1182	0.1503	0.1199	0.1846	0.0777
穗位叶宽					0.1462	-0.0388	0.2296	-0.1819	0.0174	-0.0460	0.3156	0.0397
穗长						0.0690	0.0540	0.2750	-0.0359	0.6683^**	-0.2273	0.0956
穗粗							-0.0184	-0.0787	0.2257	-0.0798	0.1677	-0.0181
秃尖长度								0.0436	-0.0235	-0.0753	0.0664	0.0617
穗行数									0.0125	-0.1249	-0.0742	-0.0037
行粒数										0.0904	-0.4193^**	0.1001
百粒重											0.0571	0.1208
单株粒重												1.0000