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Embryo culture used to transfer Mi gene into tomato
Decorative Imagephoto courtesy of Valerie Williamson, Dept. Nematology, UC Davis
Mi gene protects against nematode infection of rootsLong Description: Photos of tomato roots. Plants with the Mi gene produce roots that resist infection by nematodes. Plants without the Mi gene produce roots that are easily infected by nematodes producing the characteristic swelling and distorted patterns of root growth.
The Mi gene for nematode resistance
was found in the wild tomato
L. peruvianum. Embryo culture
and backcrosses were used to
transfer the Mi gene into tomato
cultivars. Testing progeny plants
for nematode resistance
is extremely laborious and
time-consuming. Many undesirable
genes from the wild tomato
L. peruvianum are transferred
together with the nematode
resistance gene.
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