运用灰色关联度综合分析甘蓝型杂交油菜新组合

Analyses on the Characters of new Hybrids of Brassica napus by Means of Gray Relationship Degree Method

运用灰色系统理论中的关联度方法 ,对 2 0 0 2～ 2 0 0 3年度的甘蓝型杂交油菜新组合的主要性状进行了综合分析 ,结果表明 :(1 )组合黔油 5A× 2 34 5的综合性状最好 (r =0 .85 6 ) ,其次是组合黔黄 30 3A× 2 36 2 (r =0 .848) ,31 86A× 2 478组合的综合性状最差 (r =0 .6 1 8) ;(2 )与产量关系密切程度的顺序为千粒重 >一次有效分枝数 >单株有效角果数 >角果长度 >每角粒数 >株高>主花序长度 ;(3)油菜籽含油量与千粒重的灰色关联度为 0 .6 6 5 ;(4 ) 4个甘蓝型油菜新核不育系的利用潜力序为黔油 5A >2 4A、黔黄 30 3A >31 86A ;1 0个甘蓝型油菜品系利用潜力序为 2 34 5、2 35 8、2 36 2 >2 31 9>2 40 5 >2 41 0、2 478>2 482 >2 46 6、2 46 7。

By using the way of gray relationship degree,the main agronomic characters of the new hybrids Brassica napus in 2002～2003 were analyzed synthetically. The results showed that (1)Qianyou 5A×2345 is the best of the synthetical characters(r=0.856), and Qianhuang 303A×2362(r=0.848) the second. The worst is 3186A×2478(r=0.618); (2)the order of affinity degree on yield is (1000-grain) weight> the first effective branch number > effective pod number per plant >length of pod > seed number per pod> plant height> length of main inflorescence; (3)the gray relationship degree between rapeseed’s oil content and (1000-grain )weight is 0.665; (4)Using potential order of 4 new GMS lines is Qianyou 5A>24A, Qianhuang 303A>3186A.Using potential (order) of 10 rape varieties is 2345,2358,2362>2319>2405>2410,2478>2482>2466,2467.