
TY  - JOUR
A1  - Jiang, Qunyi 
A1  - Gresshoff, Peter M. 
T1  - <emph type="2">Research note</emph>: Shoot control of hypernodulation and aberrant root formation in the <emph type="2">har1-1</emph> mutant of <emph type="2">Lotus japonicus</emph>
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 2002
VL  - 29
IS  - 11
SP  - 1371
EP  - 1376
KW  - genetic mapping, har1-1, nodulation, symbiosis, systemic control.
UR  - https://doi.org/10.1071/PP01097 
N2  - The har1-1 mutant of Lotus japonicus B-129-S9 Gifu is characterized by two phenotypes: greater than normal nodulation (hypernodulation) and significantly inhibited root growth in the presence of its microsymbiont Mesorhizobium loti strain NZP2235. We demonstrate that the two traits co-segregate, suggesting a single genetic alteration involving developmental pleiotropy. A cross between the mutant and genotype Funakura (with wild-type root and nodule morphology) demonstrated Mendelian recessive segregation of both phenotypes (root and nodule) in 216 F2 individuals. Using DNA-amplification fingerprinting polymorphisms in Gifu har1-1 and Funakura, the mutant locus was positioned between two markers at about 7 and 13 cM distance. Reciprocal hypocotyl grafting of shoots and roots showed that the hypernodulation and reduced root phenotypes are both predominantly controlled by the shoot. 
ER  -

