A comparative map of wild rice (Zizania palustris L. 2n=2x=30) |
| |
Authors: | W Kennard R Phillips R Porter A Grombacher R L Phillips |
| |
Institution: | (1) Department of Agronomy and Plant Genetics and Plant Molecular Genetics Institute,University of Minnesota, 411 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, Minnesota, MN 55108, USA e-mail: phill005@tc.umn.edu Fax: 612 625 1268, US;(2) University of Minnesota, North Central Experiment Station, Grand Rapids, MN 55744, USA, US |
| |
Abstract: | We present the first genetic map of wild rice (Zizania palustris L., 2n=2x=30), a native aquatic grain of northern North America. This map is composed principally of previously mapped RFLP (restriction
fragment length polymorphism) genetic markers from rice (Oryza sativa 2n=2x=24). The map is important as a foundation for genetic and crop improvement studies as well as a reference for genome organization
comparisons among species of Gramineae. A comparative mapping approach with rice is especially useful because wild rice is
grouped in the same subfamily, Oryzoideae, and no other mapping comparison has yet been made within the subfamily. As rice
is the reference point for mapping and gene cloning in cereals, establishing a consensus map within the subfamily identifies
conserved and unique regions. The genomes of wild rice and rice differ in total DNA content (wild rice has twice that of rice)
and the number of chromosome pairs (wild rice=15 versus rice=12). The wild rice linkage map reported herein consists of 121
RFLP markers on 16 linkage groups spanning 1805 cM. Two linkage groups consist of only two markers. Colinear markers were
found representing all rice linkage groups except #12. The majority of rice loci mapped to colinearly arranged arrays in wild
rice (92 of 118). Features of the map include duplication of portions of three rice linkage groups and three possible translocations.
The map gives basic information on the composition of the wild rice genome and provides tools to assist in the domestication
of this important food source.
Received: 25 August 1998 / Accepted: 20 February 1999 |
| |
Keywords: | RFLPs Synteny Oryza Oat Map |
本文献已被 SpringerLink 等数据库收录! |
|