King J J, Stimart D P
Department of Horticulture, University of Wisconsin, Madison 53706, USA.
J Hered. 1998 Nov-Dec;89(6):481-7. doi: 10.1093/jhered/89.6.481.
Eighteen ecotypes and two inbred lines of Arabidopsis thaliana L. Heynh. were analyzed for variation in the number of adventitious roots formed (hereafter referred to as rooting) on seedling hypocotyls in response to auxin treatment. Mean root counts varied from 1.7 to 23.1. Stable high (HA) and low (LA) rooting lines selected from ecotype Columbia, a low rooting ecotype (Mt-0), and unselected Columbia populations were evaluated for vegetative and reproductive growth parameters to determine correlated phenotypic effects of selection for rooting response. High rooting in HA correlated with compact, highly branched shoot growth. Genetic analysis of HA, Mt-0, and their F1, F2, and reciprocal backcross generations indicated that high and low rooting responses in this population may be controlled by several genes acting independently in additive-dominance fashion. Genetic variance partitioned into principally additive effects, with dominance favoring low rooting.
对18个生态型和2个拟南芥自交系进行了分析，以研究其幼苗下胚轴在生长素处理下形成不定根数量（以下简称生根）的变异情况。平均生根数在1.7至23.1之间。从低生根生态型哥伦比亚（Columbia）中选出的稳定高生根（HA）和低生根（LA）品系、一个低生根生态型（Mt-0）以及未选择的哥伦比亚种群，对其营养生长和生殖生长参数进行了评估，以确定选择生根反应的相关表型效应。HA中的高生根与紧凑、高度分支的地上部生长相关。对HA、Mt-0及其F1、F2和正反交回交世代的遗传分析表明，该种群中的高生根和低生根反应可能由几个以加性-显性方式独立起作用的基因控制。遗传方差主要分为加性效应，显性作用有利于低生根。
