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Reference Title QTLs mapping for Verticillium wilt resistance at seedling
and maturity stages in Gossypium barbadense L.
Journal Plant Science
Journal_code PLS
Year 2008
Volume 174
Page 290 298
Author Yang C
Guo WZ
Li GY
Gao F
Lin SS
Zhang TZ
Abstract Verticillium wilt (Verticillium dahliae) is a major concern
for cotton producers and consumers. The major strategy to
control disease has been the development of resistant
varieties of Gossypium. To identify Verticilium resistant
genes in cotton, we generated F2 and BC1 populations by
crossing a tolerant cultivar of Gossypium barbadense var.
Hai 7124 with a susceptible cultivar, Gossypium hirsutum
var. Junmian 1. Individual plant reaction to disease was
quantified using a leaf trait in the seedling stage and a
vascular tissue trait in mature stage. Two genetic linkage
maps were constructed with SSR, RGA and DDRT markers. Four
QTLs for the leaf trait, located on chr. A5, A7 and A8 and
three QTLs for the vascular tissue trait on chr. A5, A7 and
A9 were detected by composite interval mapping (CIM) in F2
inoculated with a non-defoliating isolate BP2. BC1S2
families were planted separately and inoculated with the
isolates, BP2, VD8 and 592. In the BP2 nursery, one QTL
located on chr. D4 for the leaf trait and two QTLs on chr.
D4 and A8 for the vascular tissue trait were detected.We
detected two QTLs on chr. A5 and A8 for the leaf trait and
three QTLs on chr. A5, D5 and D11 for the vascular tissue
trait in plants grown in the VD8 nursery. In the 592
nursery, three QTLs on chr. A5 and D5 for the leaf trait and
two QTLs on chr. D5 and D11 for the vascular tissue trait
were detected. The present QTL mapping results revealed that
two stable QTLs existed in different populations, four QTLs
expressed at both the seedling and mature stages, and some
QTLs controlling resistance to Verticillium wilt were
located on different chromosomes and in different
developmental stages for different isolates. The markers
associated with these QTLs may facilitate the use of
Verticillium wilt resistant genes in resistant breeding
programs for cotton.
Refers_to Mapping_data Hai-7124 x Junmian-1, F2 (2008) part
Hai-7124 x Junmian-1, BC1 (2008) part
Keyword Tetraploid cotton
Verticillium wilt
QTL mapping
MAS
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