Differential response of oilseed rape (Brassica napus L.) cultivars to low boron supply

被引:0
作者
Jianming Xue
Minshu Lin
Richard W. Bell
Robin D. Graham
Xiaoe Yang
Yuai Yang
机构
[1] Division of Basic Courses,Department of Land Science and Applied Chemistry
[2] Zhejiang Agricultural University,School of Biological and Environmental Science
[3] Murdoch University,Department of Plant Science
[4] University of Adelaide,Department of Earth Science
[5] The University of Waikato,undefined
来源
Plant and Soil | 1998年 / 204卷
关键词
boron deficiency; boron efficiency; Brassica napus L.; differential response; genotype; oilseed rape;
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中图分类号
学科分类号
摘要
Three experiments were carried out on an alluvial sandy loam (Udifluvent) at Tonglu, Zhejiang Province, P.R. China from 1992 to 1995, to determine the genotypic range in boron (B) efficiency of 16 oilseed rape (Brassica napus L.) cultivars, to identify the B-efficient cultivars and to identify specific responses which can be utilised for selection in a breeding program. The 16 cultivars which included high-quality and conventional types differed significantly in survival, plant height, leaf area, shoot dry weight and seed yield; however, the ranking of the cultivars for their seed yield or other plant traits differed with B treatment. With severe B deficiency (CaCl2 extractable B < 0.26 mg/kg) and no boron applied, none of the cultivars exhibited significant B efficiency, with seed yield <300 kg/ha. With moderate B deficiency (CaCl2 extractable B 0.34 mg/kg or 0.17 kg B/ha applied), seed yield varied significantly among the cultivars from 397 to 1889 kg/ha in year 1 and from 616 to 1260 kg/ha in year 3. Zhongyou 821 and 92-13 were the most B-efficient and Wanyou 324, Huashuang 2 and Su 2051 were the most B-inefficient cultivars under moderate B deficiency. Significant differences were found among the cultivars in leaf B concentration; however, there was no close relationship between leaf B concentration and seed yield responses to B of oilseed cultivars. Of all the growth parameters measured, leaf area was the early indicator best correlated with subsequent seed yield and may be useful for evaluating the response of cultivars to low B supply. Contrary to current opinion, it was also found that high-quality oilseed rape cultivars were not all sensitive to low B supply nor were all conventional cultivars B-efficient.
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页码:155 / 163
页数:8
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