Record Details

Heterosis of bacterial wilt (Pseudomonas solanacearum) resistance, yield and related traits in bell pepper (Capsicum annuum)

Indian Agricultural Research Journals

View Archive Info
 
 
Field Value
 
Title Heterosis of bacterial wilt (Pseudomonas solanacearum) resistance, yield and related traits in bell pepper (Capsicum annuum)
 
Creator SOOD, SONIA
KUMAR, NAVEEN
 
Subject Bacterial wilt, Bell pepper, Correlations, Disease, Heterosis, Resistance
 
Description The present investigation was carried out under natural field conditions at the Vegetable Experimental Farm of CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh during 2004-2009 crop growing seasons aiming at the development of high-yielding, bacterial wilt (Ralstonia solanacearum) resistant lines and hybrids of bell pepper (Capsicum annuum L. var. grossum Sendt.). The forty bell pepper lines were screened for bacterial wilt resistance and resistant ones were selfed successively from 2004-2007 in the natural sick plots maintained at the vegetable research farm. Out of theses, eleven inbreds were chosen as parents for the present study. Eight genetically diverse inbreds, used as lines were crossed with three well adapted varieties (testers) in line × tester mating design during spring-summer 2007 to obtain twenty four F1 hybrids. Thirty five genotypes (eleven parents and twenty four crosses) were planted in a complete randomized block design with three replications during summer-rainy seasons, 2008 and 2009 and data were recorded for twelve phenological, fruit yield traits and bacterial wilt incidence. On the basis of mean performance, the lines EC-464115 and EC-464107 had high yield and other related traits along with bacterial wilt resistance. As far as F1 hybrids are concerned, EC-464107 × Yolo Wonder and EC-464115 × California Wonder had high mean values along with high heterosis over better parents for fruit yield and related traits as well as resistant to the disease. Bacterial wilt disease observed in parents and hybrids confirmed the dominant nature of disease resistance, which can be exploited in combination with heterosis for yield. The genotypic correlation coefficients, in general, were higher than the corresponding phenotypic correlation coefficients, suggesting a strong inherent association among traits at genotypic level. High positive correlation of fruit yield has been observed with harvest duration, fruits/plant and marketable fruits/plant. Correlation analysis indicated that selection for earliness, more fruits, longer harvest duration and high average fruit weight could be criteria for simultaneously increasing fruit yield in bell pepper. Therefore, due attention should be paid to improve these traits while making selection of high yielding genotypes or for choosing parents for heterosis breeding with the future cultivars/varietal improvement programme. Bacterial wilt incidence had significant negative correlation with days to 50 per cent flowering, plant height, harvest duration and fruit length at both genotypic and phenotypic levels suggesting that delay in days to flowering will decrease the incidence of the disease. Similarly, with decrease in plant height and harvest duration, level of disease incidence will increase and vice-versa. Bacterial wilt incidence had non-significant negative correlation with fruit yield at genotypic, phenotypic and environmental levels suggesting their combined effect in the expression of bacterial wilt.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2013-11-07
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/34487
 
Source The Indian Journal of Agricultural Sciences; Vol 83, No 11 (2013)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/34487/15289
 
Rights Copyright (c) 2014 The Indian Journal of Agricultural Sciences