Characterizing the cytoplasmic diversity and phyletic relationship of Chinese landraces of soybean, Glycine max, based on RFLPs of chloroplast and mitochondrial DNA
Y. Shimamoto et al., Characterizing the cytoplasmic diversity and phyletic relationship of Chinese landraces of soybean, Glycine max, based on RFLPs of chloroplast and mitochondrial DNA, GEN RESOUR, 47(6), 2000, pp. 611-617
Restriction fragment-length polymorphism (RFLP) of chloroplast and mitochon
drial DNA of many soybean landraces were analyzed to characterize their cyt
oplasmic genome and to consider the diversity and phylogeny of soybean in C
hina. Three chloroplast and five mitochondrial types were distinguished, an
d seven cytoplasmic genome types were observed in different combinations in
specimens collected from China. The cytoplasmic genome diversity was highe
r at the Yangtze River Valley. The main group of cytoplasmic genomes was co
mposed of five types related phylogenetically and occurred in the southern
region of China. Two unique types were very different in cytoplasmic genome
constitution from each other and from the main group. They were considered
to be derived from wild plants with the same cytoplasmic genome and to occ
ur in two remote regions, the northern region and the Yangtze River Valley
of China, respectively. Therefore, when considered with regard to the cytop
lasmic genome of soybean landraces detected in China, seven genome types ar
e distinguished, some types may be assumed to have arisen in wild soybean b
efore domestication; and the Yangtze River Valley is the center of cytoplas
mic diversity of the soybean.