NDLI: Genetic analysis and identification of QTLs for resistance to cucumber mosaic virus in chili pepper (Capsicum annuum L.)

Content Provider	Springer Nature Link
Author	Yao, Minghua Li, Ning Wang, Fei Ye, Zhibiao
Copyright Year	2013
Abstract	A pepper (Capsicum annuum) inbred line ‘BJ0747-1-3-1-1’ was found to exhibit resistance to a cucumber mosaic virus (CMV) local isolate (CMV-HB). In order to exploit the genetic mechanism of CMV resistance in this pepper line, inheritance and genetic linkages of CMV resistance were studied. The CMV-resistant ‘BJ0747-1-3-1-1’ (P1) was crossed to the susceptible line ‘XJ0630-2-1-2-1-1’ (P2), and the F2 and back-cross populations (B1 and B2) were generated for segregation analysis following a mixed inheritance model. Analysis of the segregation data revealed that CMV resistance in ‘BJ0747-1-3-1-1’ is controlled by two partially additive-dominant major genes and additive-dominant polygenes. Analysis of the results from two growth seasons also identified two stable and major QTLs for CMV resistance that collectively explained 55 % of the trait variation. One of the two major QTLs was found on linkage group 8 (LG8) between markers TS52 and HpmsE1-43, and accounted for 37.7–43.5 % of the variation in the two inoculation experiments. The other QTL on LG4 between markers UBC843 and S74 was found to be responsible for 10.7–11.2 % of the trait variation. QTLs with minor effects on CMV resistance were also identified. This work provides an example for genetic analysis and QTL mapping of other disease-resistance genes in pepper and the findings should be useful for molecular marker-assisted breeding programs that aim at developing disease-resistant cultivars in peppers.
Starting Page	135
Ending Page	145
Page Count	11
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	193
Issue Number	2
e-ISSN	15735060
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-06-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	CMV Genetic analysis Pepper QTL (quantitative trait loci) Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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