Resistance to whitefly (Bemisia argentifolii) and repellency to the two-spotted spider mite (Tetranychus urticae) in tomato plant hybrids with high leaf contents of acylsugar and the Mi gene
The aim of this study is to verify levels of resistance to whitefly ( Bemisia argentifolii ) and the two-spotted spider mite ( Tetranychus urticae ) in experimental hybrids of tomato plants with high acylsugar content and that bear the Mi allele, and to compare the levels of resistance to those pest...
Saved in:
Published in | Euphytica Vol. 214; no. 8; pp. 1 - 9 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.08.2018
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The aim of this study is to verify levels of resistance to whitefly (
Bemisia argentifolii
) and the two-spotted spider mite (
Tetranychus urticae
) in experimental hybrids of tomato plants with high acylsugar content and that bear the
Mi
allele, and to compare the levels of resistance to those pests according to the presence or absence of acylsugars and the
Mi
allele. Eleven genotypes were tested in assessment of resistance to whitefly: two inbred lines, TOM-760 (
Mi/Mi
), with high acylsugar content, and TOM-684 (
Mi/Mi
), with low acylsugar content; six experimental hybrids heterozygous for acylsugar contents, TEX-407 (
Mi
+
/Mi
), TEX-408 (
Mi
+
/Mi
), TEX-409 (
Mi
+
/Mi
), TEX-410 (
Mi
+
/Mi
), TEX-411 (
Mi
+
/Mi
), and TEX-412 (
Mi/Mi
); Santa Clara cultivar (
Mi
+
/Mi
+
) with low acylsugar content; and two control hybrids with low acylsugar content, Ibiza (
Mi
+
/Mi
) and Carina (
Mi
+
/Mi
). In the test for repellency to the two-spotted spider mite, we used the same genotypes as in the whitefly resistance test, except for the Carina hybrid. Genotypes homozygous for acylsugars and
Mi
, heterozygous for
Mi/Mi
or
Mi
+
/Mi
acylsugars, and homozygous and heterozygous for
Mi
alone showed levels of resistance to the
Bemisia argentifolii
fly, in contrast with the genotype with low contents of acylsugars and
Mi
+
/Mi
+
. Genotypes homozygous and heterozygous for acylsugars exhibit higher levels of repellency to the
Tetranychus urticae
mite than genotypes with low contents of acylsugar. The
Mi
gene, however, was not effective in providing resistance to the two-spotted spider mite. The effects of resistance to
Bemisia argentifolii
shown by the acylsugars are added to the effects of the
Mi
gene. |
---|---|
ISSN: | 0014-2336 1573-5060 |
DOI: | 10.1007/s10681-018-2224-1 |