多次回交水稻短根突变体RM1的农艺性状

Agronomic characters of many times backcross short-Root mutant rice RM1

用 射线处理水稻品种大力 ,在 M3世代中选育出短根突变体 RM1。现用回交的 RM1及原品种大力进行土培和水培试验 ,评价短根对产量及其农艺性状的影响。试验结果表明 ,回交的RMI根长、根数和根干重约为大力的 4 0 % ,14 0 %和 6 0 % ;株粒重及株高约为大力的 5 0 %及 90 %。短根形态对经济产量的影响大于对生物产量的影响。

A rice variety wild type Oochikara was treated by -rays,selected shoot root mutant RM1 in M3 generation.Soil and solution culture were used in five time backcross RM1 and wild type Oochikara.It was appraised that short root effected on yield and other agronomic characters.The experiment show that the length?numbers and dry weight of root were 37%?142%?and 60% of wild type Oochikara;the weight of seeds of a plant and the length of stem were46% and 89% of wild type Oochikara.$$$$