番茄耐除草剂赛克嗪性状的遗传分析

Genetic Analysis of Metribuzin Tolerance in Tomato

研究番茄耐赛克嗪性状的遗传结果表明,番茄对赛克嗪耐性为不完全隐性遗传,平均显性度-H/D^(1/2)=-0.538,最少基因数K=1.27,推测该性状可能由一对以上基因控制。该杂交组合F_2和B_2代幼苗存活率依赛克嗪处理浓度的回归方程分别为,P=4.6341—2.4130lgCi,P=5.1600-3.3481lgCi。

The metribuzin-tolerant germplasm UGA1113MT and a cultivar H7492 of tomato and their progenies have been tested, setting up 10 concentration treatments of metribuzin and adopting Souza Machado' s bioassay, to study inheritance of the metribuzin tolerance in tomato. The result indicates that the inheritance of the metribuzin tolerance in tomato is incomplete recessive, the degree of average dominant - (H/D)^(1/2)=-0. 546,the minimum number of genes K = l. 27, estimated that this trait is governed by more than one gene pair. The regressive equations of the seedling survival rates on the concentrations of metribuzin in F_2 and B_2 of this cross are: P = 4. 6341 - 2. 4130 lg C_i, r=-0. 9390, P = 5. 1600-3. 3481 lg C_i,r=-0. 9820, respectively.