Record Details

Mapping Quantitative Trait Loci for resistance to watermelon bud necrosis orthotospovirus in watermelon [Citrullus lanatus (Thunb.) Matsum &Nakai].

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Mapping Quantitative Trait Loci for resistance to watermelon bud necrosis orthotospovirus in watermelon [Citrullus lanatus (Thunb.) Matsum &Nakai].
Not Available
 
Creator Not Available
 
Subject Resistance Watermelon WBNV Orthotospovirus Mapping
 
Description Not Available
Watermelon [Citrullus lanatus (Thunb.) Matsum & Nakai] is an important cucurbit crop cultivated worldwide. In an effort to map WBNV resistance, the current study consisted of two populations derived from a WBNV resistant accession, IIHR- 82 belonging to Citrullus lanatus var. citroides (Syn. Citrullus amarus). The first population is a backcross inbred population (BC1F6) of 141 families (Pop I) that was developed by crossing IIHR-82 to an elite cultivar Arka Manik. A resistant family, BIL-53 belonging to Pop I was crossed to IIHR-140 to develop F3 population, consisting of 112 families (Pop II). Each of these populations was evaluated for WBNV incidence for two years under natural epiphytotic conditions. A significant correlation was observed for
various resistance traits across years and populations. The frequency distribution graphs of Area Under
Disease Progress Curve for WBNV incidence in both the populations exhibited a continuous distribution,
indicating that trait is quantitative in nature. A total of 163 markers were mapped for the Pop I which spread
onto 15 linkage groups (LGs) spanning a total map length of 3310.17 cM with a mean marker interval of
20.31 cM. The linkage map for the Pop II was constructed with 135 markers spread over 12 linkage
groups spanning a total length of 1965.53 cM with an average interval between markers of 14.56 cM.The
QTL analysis for WBNV resistance related traits revealed 14 major QTL’s for Pop I and 19 for Pop II
with a maximum PVE upto 21.20%. Multi-trait QTL regions were observed on LG 3b for Pop I and LG 2,
LG 4, LG 7 and LG 8 for Pop II. Importantly, we observed common QTL regions for plant survival on
LG 2 and PDI on LG 3 and LG 8 for both the populations. As this is the first attempt to map QTL’s
for WBNV resistance, the results obtained in the present study may provide a guide for fine mapping
multi-trait QTL regions.
Not Available
 
Date 2021-07-23T09:06:07Z
2021-07-23T09:06:07Z
2020-05-20
 
Type Book
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/49522
 
Language English
 
Relation Not Available;
 
Publisher Not Available