Inheritance of Erucic Acid, Glucosinolate, and Oleic Acid Contents in Rapeseed （Brassica napus L.）

This study was conducted to verify the inheritance of certain characters of rapeseed including erucic acid, glucosinolate and oleic acid contents by using generation mean analysis. The cross of lines Ⅲ...     

甘蓝型油菜雄性不育系性状关联性分析

[目的]评估甘蓝型油菜雄性不育系性状间的关系。[方法]采用半双列杂交方法,利用10个甘蓝型油菜隐性细胞核雄性不育系为材料配制了45个杂交组合。45的杂交组合和10个亲本材料于2007-2008年在贵阳种植并用于评估。[结果]植株高度、株有效角果数、初花期和成熟期与产量成显著正相关,相关系数分别为0.644,0.583,0.281和0.341;每角粒数与种子大小（千粒重）成显著负相关（-0.533）。株有效角数、每角粒数、千粒重和植株高度对产量的直接通径系数分别为0.5562、0.4074、0.4813和0.4017。[结论]株有效角数、每角粒数、千粒重和植株高度与种子产量成正相关,并对产量有较高的直接贡献。其它性状包括株分枝数、初花期、成熟期和含油量对产量的贡献较低。     

Heterosis for Seed Yield,0il Content and Other Characters in Rapeseed(Brassica napus L.)

Nine inbred lines of rapeseed(Brassica napus L.)used as male were crossed to five recessive genetic male sterile(RGMS)lines used as female to produce 45 single crosses.The crosses,their parents and a check hybrid were tested at two locations during 2007 to 2008 for testing the performance and heterosis of hybrids for seed yield and other characters.Results showed that variationsfor seed yield,oil content,days to flowering and days to maturity were significant.Mean squares for hybrids were significant for allcharacters.High heterosis(-4.5%-88.3%),heterobeltiosis(-15.6%-81.1%)and standard heterosis(-34.8%-33.1%)were found forthe seed yield.The highest heterosis and heterobcltiosis were found in the cross QH303-4A×1190.The highest standard heterosiswas found in the Cross Qianyou8A×Q034.Both positive and negative heterosis of single crosses were demcted for the oil content.Small heterosis was found for days to flowering and days to maturity.Among parents,Ⅲ188,Ⅲ224,and Q034 were proved to be thesuperior for seed yield when used as parents in most of the hybrid combinations.2365,Ⅲ1224,and QH303-4AB were good for high oilcontent breeding.Ⅲ176,2313 and Qianyou3AB were good for the early hybrid breeding.Total 11 hybrids yielded higher than 2 500kg·hm-2 and also gave significantly positive heterosis,heterobeltiosis and standard heterosis.Among them,10 crosses gave higher oilcontent than that of check.These crosses Can be used in the future breeding program for the seed yield and the oil content.Two crossesincluding Qianyou3A×Ⅲ224 and Qianyou3A×2313 can be used for the early breeding program.     

Analysis on Combining Ability for Characters of Male Sterile Lines in Rapeseed （ Brassica napus L.）

The male sterile line is very important in the hybrid breeding program of rapeseed. This study was conducted to evaluate the combining ability of many characters of male sterile lines in Brassica napus...