MOLECULAR BREEDING FOR IMPROVEMENT OF FOLIAR FUNGAL DISEASE RESISTANCE AND OIL QUALITY IN GROUNDNUT (Arachis hypogaea L.)
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Date
2019
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PROFESSOR JAYASHANKAR TELANGANA STATE AGRICULTURAL UNIVERSITY
Abstract
Kadiri 6 (K 6) is a popular high yielding, short duration groundnut variety
possessing high oil and attractive kernel features, nevertheless K 6 is highly susceptible
to late leaf spot (LLS) and rust diseases of groundnut. The present study sought to
introgress LLS, rust resistance and high oleic acid traits from donor lines ICGVs 13193
and 15033 respectively into K 6 cultivar. Genotyping for target alleles was performed in
first generation with gel based linked SSR markers and in later generations with high
throughput Kompetitive allele specific PCR (KASP) based SNPs assay. Backcrossing
and selfing resulted in the development 343 BC1F2s of which 16 plants were identified
with homozygous alleles for rust, LLS and high oleic traits. Evaluation of these
backcross progenies resulted in four progenies (BC1F2s-76, 216, 225, and 311) resistant
to LLS and three progenies (BC1F2s-4, 186 and 327) resistant to rust. Morphoagronomic and nutritional quality analysis revealed three progenies (BC1F2s-76, 278
and 296) were superior for morpho-agronomic and nutritional traits over K 6. The pod
features viz., pod beak, pod reticulation, pod constriction, and pod ridges were attractive
over K 6. The higher oil content (>50.0%) was observed in 11 progenies (BC1F2s-5, 76,
120, 144, 186, 214, 225, 249, 278, 296 and 327) in comparison to K 6 (49.5%). The
oleic acid was higher in three progenies BC1F2-76 (81.32%), BC1F2-278 (82.8%) and
BC1F2-296 (83.4%).
Author : DNYANESHWAR B. DESHMUKH
Title of Thesis : MOLECULAR BREEDING FOR IMPROVEMENT OF
FOLIAR FUNGAL DISEASE RESISTANCE AND OIL
QUALITY IN GROUNDNUT (Arachis hypogaea L.)
Degree : DOCTOR OF PHILOSOPHY
Faculty : AGRICULTURE
Discipline : MOLECULAR BIOLOGY AND BIOTECHNOLOGY
Major advisor : Dr. M. BALRAM
University : PROFESSOR JAYASHANKAR TELANGANA STATE
AGRICULTURAL UNIVERSITY
Year of submission : 2019
ABSTRACT
These three progenies showed resistance to LLS a disease score of 3.0- 3.5 and
rust resistance with a disease score of 4.0. The selected progenies featured with slight
pod constriction and pod reticulation. Pod beak was slight in two progenies (BC1F2s-76
and 296) and medium in BC1F2-278. The pod ridges were absent in BC1F2s- 278 and
296 and slight in BC1F2-76. All the selected segregants showed higher oil content
(>50.0%), oleic acid (>80.0%) and reduced linoleic acid (<10.0%). Advanced breeding
lines derived from K 6 for LLS, rust resistance and high oleic traits will be suitable
replacement for K 6 especially in disease hot spot locations.
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D10,396