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Mode of action of genes controlling yield and yield attributing traits and tagging genomic regions controlling response to anthracnose disease in hot pepper

KrishiKosh

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Title Mode of action of genes controlling yield and yield attributing traits and tagging genomic regions controlling response to anthracnose disease in hot pepper
 
Creator Arpita, Srivastava
 
Contributor A, Mohan, Rao
 
Subject fruits, crossing over, planting, summer, diseases, seasons, biological phenomena, yields, hybrids, chillies
 
Description An investigation including three separate experiments were carried out at the experimental plots of the Dept. of GPB, K Block and at the Hot Pepper Improvement Unit, Dept. of GPB, CoA, UAS, GKVK from 2009-2012. Experiment I comprised of thirteen parental lines of chilli which were crossed in half diallel mating design to generate 78 hybrids and were evaluated for their parental gca effects and sca effects and heterosis of crosses. Highest gca effects was recorded by Gouribidanur for plant height, Byadgi Kaddi for fruit length and average dry red fruit weight, LCA-960 for fruit width and average fresh green fruit weight and Arka Suphal for fresh green fruit yield per plant. Highest sca effects were recorded for P6× P13 (kharif, 2010) and P2 × P3 (summer, 2011) for average fresh green fruit weight. Experiment II consisted of two sets of triple test cross (TTC) progenies generated involving two separate crosses (Arka suphal × Gouribidanur and Susan Joy × PBC-483). First set of TTC progenies were phenotyped for green fruit yield, plant height, reaction to thrips infestation and anthracnose infection, while second set of TTC progenies were phenotyped for fruit length, fruit width, average fruit weight and number of fruits per plant. Significant overall epistasis () was detected for all traits except fruit width, number of fruits per plant and thrips infestation. Additive and dominance gene action played an important role in the inheritance of all the quantitative traits except for reaction to thrips infestation. The third experiment involved the development of F2 mapping population involving Gouribidanur and Lampong local short as parents with an objective to tag genomic regions conferring anthracnose resistance. The population was phenotyped for reaction to anthracnose and genotyped using twenty four microsatellite markers. However, none of the SSR markers were linked to genomic regions controlling this trait as revealed by single marker analysis.
 
Date 2016-05-18T13:34:00Z
2016-05-18T13:34:00Z
2012-10-05
 
Type Thesis
 
Identifier Th-10399
http://krishikosh.egranth.ac.in/handle/1/66072
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru