Effects of Picking Flowering Stalk on Agronomic Traits and Economic Benefits of Brassica napus L.

doi:10.11924/j.issn.1000-6850.casb2022-0474

Abstract

Abstract:

In order to improve the application value of Brassica napus, the multifunctional utilization of Brassica napus was explored. In this experiment, we selected Brassica napus G1 with excellent agronomic characters as the male parent and G2 as the female parent to construct 289 double haploid (DH) pure lines. We investigated and evaluated the flowering stalk yield, plant characters, seed yield, biological yield and economic benefits of the lines. And then we screened “rapeseed oil-vegetable dual-purpose” Brassica napus lines with high flowering stalk yield, no impact on Brassica napus seed yield and high economic benefits. The results showed that the branch height (BH) and the first branch number (NFB) were negatively correlated with Brassica napusseed yield. Compared with the control, picking flowering stalk reduced plant height (PH), BH and NFB, and the difference reached a significant level; in DH population, there was a negative correlation between Brassica napus seed yield and flowering stalk yield. After picking flowering stalk, the Brassica napus seed yield decreased by 19.24% on average compared with that without picking, but the total output value increased by 48.87% on average. Among the materials, the Brassica napus seed yield of 48 selected materials (with a yield variation range of -10%-10%) was not affected by picking flowering stalk, while that of 63 selected materials increased by more than 10% after picking. Brassica napus seed yield of 30 materials exceeded 3000 kg/hm². Based on the above indicators, 21 “rapeseed oil-vegetable dual-purpose” materials with good yield and economic benefit were selected in this experiment, whose yield of flowering stalk and rapeseed both met the yield requirements of the Brassica napus seed region in the Yangtze River basin. The study can provide theoretical guidance and scientific basis for the breeding and promotion of dual-purpose rapeseed.

Key words: double haploid population, flowering stalk, rapeseed oil-vegetable dual-purpose, agronomic character, Brassica napus seed yield

ZHAO Jianan, CAO Xiaodong, SHANG Liping, TONG Xiaoli, LI Baojun, ZHAO Yajun, LUO Bin, WANG Hao. Effects of Picking Flowering Stalk on Agronomic Traits and Economic Benefits of Brassica napus L.[J]. Chinese Agricultural Science Bulletin, 2023, 39(12): 28-34.

Figures/Tables 10

References 28

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项目	菜薹单株产量/g
最小值	19.1
最大值	64.11
均值	32.39
标准差	10.97
方差	120.29
峰度	1.05
偏度	0.19
变异系数/%	33.8

项目	菜薹单株产量/g
最小值	19.1
最大值	64.11
均值	32.39
标准差	10.97
方差	120.29
峰度	1.05
偏度	0.19
变异系数/%	33.8

变异来源	F value
变异来源	株高	分枝高度	一次分枝数
采薹	48.63^**	1700.28^**	788.82^**

变异来源	F value
变异来源	株高	分枝高度	一次分枝数
采薹	48.63^**	1700.28^**	788.82^**

性状	对照组			采薹组
性状	株高/cm	分枝高度/cm	一次分枝数/个	株高/cm	分枝高度/cm	一次分枝数/个
最小值	88	16.20	3	75	7.33	2
最大值	180	88	15	180	51.40	7
均值	141	59.42	8	130.45	19.07	4
标准差	19.11	15.64	1.98	19.11	15.64	1.98
变异系数	1.81	0.39	0.50	1.81	0.39	0.50