Study on the Construction of a Comprehensive Index Identification and Evaluation of Water Saving and Drought Resistance of Hybrid Rice Combinations

doi:10.11923/j.issn.2095-4050.cjas2021-0223

Abstract

Abstract:

A gradient quantitative water control experiment was conducted with six hybrid rice combinations to simplify the technical system of the comprehensive evaluation of water conservation and drought resistance of hybrid rice combinations and their application in breeding. Observation records and traditional seed testing methods were employed to obtain yield data and other agronomic parameters. Based on the mapping and area algorithm of drought resistance index of each trait, five composite indexes of drought resistance involving multi gradient and multi traits were constructed by using five primary trait indexes, including yield and its component traits, sowing to heading days and harvest index. The five composite indexes were Y-PFK (the index of yield and its component), Y-HDD (the index of yield and the delayed effect of heading date), Y-HI (the index of yield and harvest index), CI1 (the comprehensive index 1) and CI2 (the comprehensive index 2). Each combination's five composite indexes were computed, and their mapping was analyzed. The results have shown that CI1, CI2, Y-PFK positively impacted the tested combinations' comprehensive evaluation of water conservation and drought resistance and were consistent with the actual field experience observation. The comprehensive evaluation of water conservation and drought resistance of the six hybrid rice combinations were as follows: ‘Hanliangyou 8' > (‘Yayou Hanhe' > ‘Hanyou 737') > (‘Hanyou 73' > ‘Quanyou 116' > ‘Quan 9you 86'). The research findings demonstrate that the multi-gradient and multi-traits composite indexes of drought resistance, Y-PFK, CI1 and CI2, are appropriate for comprehensively evaluating rice's water conservation and drought resistance. These are simplified indicators for the comprehensive assessment and sequencing of water conservation and drought resistance of hybrid rice combinations by only using conventional seed testing data. These composite indexes can be applied to rice breeding for water conservation and drought resistance.

Key words: hybrid rice, water saving and drought resistance, identification and evaluation, comprehensive index, water saving and drought resistant rice

KANG Haiqi, SUN Xiaowen, WANG Shimei, HE Fang, ZENG Yongxuan, QIN Rongmin, HAN Youxue, KANG Jiarong, ZENG Lin, ZHANG Hong. Study on the Construction of a Comprehensive Index Identification and Evaluation of Water Saving and Drought Resistance of Hybrid Rice Combinations[J]. Journal of Agriculture, 2023, 13(8): 1-10.

Figures/Tables 8

References 28

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品种名称	处理梯度	播抽天数/d	单株有效穗数	每穗总粒数	每穗实粒数	千粒重/g	单株籽粒产量/g	收获指数
雅优旱禾	Ⅰ	97.0	6.9	132.3	112.2	23.8	18.19	0.63
	Ⅱ	97.7	7.3	135.9	110.6	24.1	19.62	0.58
	Ⅲ	99.0	6.6	132.1	61.0	18.1	6.70	0.36
	Ⅳ	113.0	2.0	57.6	4.9	12.4	1.93	0.13
荃9优86	Ⅰ	99.0	7.1	151.7	115.1	22.5	18.09	0.57
	Ⅱ	96.7	7.2	138.2	47.1	19.6	9.45	0.37
	Ⅲ	99.0	5.8	109.7	15.8	18.4	1.67	0.13
	Ⅳ	97.7	1.1	60.3	15.7	15.2	0.30	0.16
荃优116	Ⅰ	103.7	8.3	147.0	107.4	23.2	18.83	0.51
	Ⅱ	96.3	7.3	135.2	89.7	20.8	13.58	0.47
	Ⅲ	99.7	4.8	90.1	36.1	21.3	3.31	0.26
	Ⅳ	115.3	1.0	90.8	3.4	5.1	0.06	0.01
旱优737	Ⅰ	99.0	7.1	138.2	105.1	22.2	14.83	0.56
	Ⅱ	100.3	7.3	126.3	98.0	21.0	15.08	0.53
	Ⅲ	99.7	5.6	100.6	46.7	19.8	5.02	0.28
	Ⅳ	107.0	4.6	62.5	16.4	14.0	1.31	0.16
旱两优8号	Ⅰ	99.3	9.0	93.6	72.9	21.9	15.48	0.6
	Ⅱ	98.7	9.3	100.3	74.5	23.9	16.59	0.54
	Ⅲ	98.3	8.1	63.5	23.3	19.0	4.11	0.25
	Ⅳ	95.7	5.8	70.0	32.1	14.8	2.76	0.27
旱优73	Ⅰ	106.0	5.9	131.8	73.0	26.6	10.68	0.51
	Ⅱ	104.3	6.1	113.5	59.5	20.8	7.37	0.36
	Ⅲ	118.0	5.8	70.0	13.6	15.1	1.09	0.12
	Ⅳ	124.3	2.8	44.9	20.0	15.1	1.98	0.16

品种名称	处理梯度	播抽天数/d	单株有效穗数	每穗总粒数	每穗实粒数	千粒重/g	单株籽粒产量/g	收获指数
雅优旱禾	Ⅰ	97.0	6.9	132.3	112.2	23.8	18.19	0.63
	Ⅱ	97.7	7.3	135.9	110.6	24.1	19.62	0.58
	Ⅲ	99.0	6.6	132.1	61.0	18.1	6.70	0.36
	Ⅳ	113.0	2.0	57.6	4.9	12.4	1.93	0.13
荃9优86	Ⅰ	99.0	7.1	151.7	115.1	22.5	18.09	0.57
	Ⅱ	96.7	7.2	138.2	47.1	19.6	9.45	0.37
	Ⅲ	99.0	5.8	109.7	15.8	18.4	1.67	0.13
	Ⅳ	97.7	1.1	60.3	15.7	15.2	0.30	0.16
荃优116	Ⅰ	103.7	8.3	147.0	107.4	23.2	18.83	0.51
	Ⅱ	96.3	7.3	135.2	89.7	20.8	13.58	0.47
	Ⅲ	99.7	4.8	90.1	36.1	21.3	3.31	0.26
	Ⅳ	115.3	1.0	90.8	3.4	5.1	0.06	0.01
旱优737	Ⅰ	99.0	7.1	138.2	105.1	22.2	14.83	0.56
	Ⅱ	100.3	7.3	126.3	98.0	21.0	15.08	0.53
	Ⅲ	99.7	5.6	100.6	46.7	19.8	5.02	0.28
	Ⅳ	107.0	4.6	62.5	16.4	14.0	1.31	0.16
旱两优8号	Ⅰ	99.3	9.0	93.6	72.9	21.9	15.48	0.6
	Ⅱ	98.7	9.3	100.3	74.5	23.9	16.59	0.54
	Ⅲ	98.3	8.1	63.5	23.3	19.0	4.11	0.25
	Ⅳ	95.7	5.8	70.0	32.1	14.8	2.76	0.27
旱优73	Ⅰ	106.0	5.9	131.8	73.0	26.6	10.68	0.51
	Ⅱ	104.3	6.1	113.5	59.5	20.8	7.37	0.36
	Ⅲ	118.0	5.8	70.0	13.6	15.1	1.09	0.12
	Ⅳ	124.3	2.8	44.9	20.0	15.1	1.98	0.16

梯度处理	单株有效穗数	每穗实粒数	千粒重/g	单株籽粒产量/g	播抽天数/d	收获指数
100%田间持水量(Ⅰ)	7.4 aA	97.6 aA	23.4 aA	16.0 aA	100.7 bB	0.56 aA
80%田间持水量(Ⅱ)	7.4 aA	79.9 aA	21.7 aAB	13.6 abA	99.0 bB	0.48 bA
60%田间持水量(Ⅲ)	6.1 aA	32.7 bB	18.6 bB	3.6 cB	102.3 bAB	0.23 cB
40%田间持水量(Ⅳ)	2.9 bB	15.4 cC	12.8 cC	1.4 dB	108.8 aA	0.15 dB

梯度处理	单株有效穗数	每穗实粒数	千粒重/g	单株籽粒产量/g	播抽天数/d	收获指数
100%田间持水量(Ⅰ)	7.4 aA	97.6 aA	23.4 aA	16.0 aA	100.7 bB	0.56 aA
80%田间持水量(Ⅱ)	7.4 aA	79.9 aA	21.7 aAB	13.6 abA	99.0 bB	0.48 bA
60%田间持水量(Ⅲ)	6.1 aA	32.7 bB	18.6 bB	3.6 cB	102.3 bAB	0.23 cB
40%田间持水量(Ⅳ)	2.9 bB	15.4 cC	12.8 cC	1.4 dB	108.8 aA	0.15 dB

组合名称	单株有效穗数	每穗实粒数	千粒重/g	单株籽粒产量/g	播抽天数/d	收获指数
雅优旱禾	5.7 bcB	72.2 aA	19.6 abA	11.6 aA	101.7 bcB	0.43 aA
荃优116	5.4 cB	59.2 abcAB	17.6 bA	8.9 abAB	103.8 bB	0.31 bcA
荃9优86	5.3 cB	48.4 cdAB	18.9 abA	7.4 bcAB	98.1 cB	0.31 bcA
旱优737	6.1 bB	66.6 abA	19.3 abA	9.1 abAB	101.5 bcB	0.38 abA
旱两优8号	8.1 aA	50.7 bcdAB	19.9 aA	9.7 abAB	98.0 cB	0.42 aA
旱优73	5.1 cB	41.5 dB	19.4 abA	5.3 cB	113.2 aA	0.29 cA