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Linkage between Maize Dwarf Mosaic Virus Resistance and Endosperm Color in Maize
Author(s) -
Scott Gene E.
Publication year - 1989
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1989.0011183x002900060031x
Subject(s) - endosperm , biology , inbred strain , white (mutation) , gene , plant disease resistance , zea mays , genetics , botany , agronomy
Maize dwarf mosaic is the most widespread virus disease of maize ( Zea mays L.) in the USA. The objective of this study was to determine which, if any, of eight maize inbreds with resistance to maize dwarf mosaic virus strain A (MDMV‐A) had a gene or genes for resistance linked to the endosperm color gene (Y 1 ) on Chromosome 6. Resistant inbreds with yellow endosperm AR234, Ark342, E663, N7B, SC54, SC278, and Tx5858 were crossed onto a susceptible inbred, Mp333, which has a white endosperm Resistant inbred KyBll0 with white endosperm was crossed onto the susceptible inbred CI21 that has yellow endosperm. The F 2 kernels were separated for kernel color into dark yellow, light yellow, and white kernels. Plants from the dark yellow kernels had a significantly lower proportion of diseased to healthy plants than did plants from white kernels for all F 2 populations involving resistant inbreds with yellow endosperm, indicating that each of these inbreds had a gene for resistance linked to Y 1 . The white inbred, KyB110, also has a gene for resistance linked to Y 1 because the proportion of diseased to healthy plants was lower for plants from white kernels than for plants from dark yellow kernels. Resistance to MDMV‐A for the gene(s) linked to Y 1 among the resistant parents seemed to be dominant to mostly dominant except for KyBll0. The data indicated that most of the resistant lines have additional genes for resistance to MDMV that are not linked to the Y l gene. However, crossovers between the gene for resistance to MDMV and the Y l gene and/or gene penetrance could have an effect on what conclusions can be made.