干旱地区农业研究Issue(4)：49-58,10.DOI:10.7606/j.issn.1000-7601.2015.04.08
不同生态条件下白菜型冬油菜性状差异分析
Variations in quality and agronomic traits of winter rapeseed (Brassica campestris L .) grown in different ecological regions
摘要
Abstract
Eleven winter rapeseed ( Brassica campestris L .) cultivars with different levels of cold resistance were grown in four ecological regions in Gansu province ,northwest China .Changes in the progression of growth ,agronomic traits ,and quality of northward-expanded rapeseed plants were determined ,and their correlations with major regional e-cological factors were evaluated , in order to provide a reference for northward expansion and cultivation of this crop . Compared with those in the original growing area (Tianshui ) , northward -expanded rapeseed plants exhibited great changes in the progression of growth ,as reflected mainly by the significantly shortened growth period in pre-winter and prolonged over-wintering period .Total growth period (number of days ) between seedling establishment and maturation stages after wintering was not changed .However ,early growth process during seedling establishment to final flower stage was accelerated ,while the podding stage was prolonged .Additionally ,northward-expanded rapeseed cultivars had taller plant height and lower branch part ,with shorter primary inflorescence than the control plants .The former had a reduced number of siliques per plant but an increased number of branches ,showing poor plant morphology .The number of seeds per silique and thousand seed weight were increased ,suggesting improvements in silique and seed traits .Seed oil content as well as oleic ,linolenic ,and erucic acid contents became increased ,which coincided with reductions in linoleic ,e-icosenoic acid ,and thioglycoside contents .Seed oleic and linolenic acid contents were positively correlated with latitude and altitude ,and negatively correlated with rainfall ,mean annual temperature ,and temperature of the coldest month , whereas gadoleic acid and thioglycoside contents showed the opposite .In conclusion ,northward expansion of winter rape-seed cultivars resulted in the poor plant morphology but improved silique and seed traits ;during the progression of plant growth ,the pre-winter growth period was shortened , but the over-wintering period was prolonged . The growth after seedling establishment was accelerated ,and prolonging of podding stage facilitated gain of seed weight .Also ,seed oil content was increased .High latitude and altitude were beneficial to the accumulation of oleic and linolenic acids ,where-as high rainfall and low temperature were favorable for the accumulation of eicosenoic acid .关键词
白菜型冬油菜/北移种植/生态区/生育期进程/农艺性状/品质Key words
winter rapeseed/northward expansion/ecological region/growth process/agronomic traits/quality分类
农业科技引用本文复制引用
刘自刚,孙万仓,杨宁宁,武军艳,方彦,李学才,曾秀存,王月..不同生态条件下白菜型冬油菜性状差异分析[J].干旱地区农业研究,2015,(4):49-58,10.基金项目
国家“863”高技术研究发展计划（2011AA10A104）；国家自然科学基金（31460356）；国家现代农业产业技术体系建设专项（CARS －13）；甘肃省科技重大专项 （）
