Genetic Analysis of Seed Dormancy and Productivity in Groundnut (Araclis hypogaea L.)
By: Tessy Joseph.
Contributor(s): Namboodiri K M N(Guide).
Material type:
BookPublisher: Vellanikkara Department of Plant Breeding and Genetics, College of Horticulture 1997DDC classification: 630.28 Online resources: Click here to access online Dissertation note: PhD Abstract: Investigations on Genetic analysis of seed dormancy and productivity in
groundnut (Arachis hypogaea L.) were carried out in the Department of Plant
Breeding and Genetics, College of Horticulture, Vellanikkara from 1992-95. The objective of the study was to find out the gene effects of biometric traits and seed dormancy in groundnut, so as to suggest appropriate breeding
methodology and parental combinations to evolve dormant, high yielding and
early maturing varieties. The findings of the study are briefed below.
Evaluation of 28 genotypes (14 dormant and 14 non dormant) for two
seasons revealed that wide range of variability existed among them. Donors
for specific traits were identified. The genotypes were also genetically diverse
and could be grouped into four clusters.
The line x tester analysis with three lines and five testers revealed that
additive gene effects governed most of the characters except pod yield and
number of mature pods, for which, non additive gene effects were important.
To harness both the types of gene effects pedigree method followed by
selection in advanced generations will be fruitful.
Analysis of gca effects of parents revealed that JL-24 and ICG-7269
were good combiners for yield. Good combiners for specific traits were also
identified. Significant positive sca effects were recorded for the pod characters.
Relative heterosis, heterobeltiosis or standard heterosis were observed
for all characters in most of the crosses. Significant heterobeltiosis for yield
was observed in five crosses.
The dormancy studies in different generations revealed that dormancy
is dominant over non dormancy. The dispersed frequency distribution in F1 and
F 2 indicated that dormancy is a quantitative trait and multiple genes might be
controlling the trait.
The generation mean analysis' over six generations indicated that
predominantly non-allelic gene interactions were present for seed dormancy.
Hence pedigree method of breeding with selection from advanced generations
will be ideal for fixing the character.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 630.28 TES/GE (Browse shelf) | Available | 171307 |
PhD
Investigations on Genetic analysis of seed dormancy and productivity in
groundnut (Arachis hypogaea L.) were carried out in the Department of Plant
Breeding and Genetics, College of Horticulture, Vellanikkara from 1992-95. The objective of the study was to find out the gene effects of biometric traits and seed dormancy in groundnut, so as to suggest appropriate breeding
methodology and parental combinations to evolve dormant, high yielding and
early maturing varieties. The findings of the study are briefed below.
Evaluation of 28 genotypes (14 dormant and 14 non dormant) for two
seasons revealed that wide range of variability existed among them. Donors
for specific traits were identified. The genotypes were also genetically diverse
and could be grouped into four clusters.
The line x tester analysis with three lines and five testers revealed that
additive gene effects governed most of the characters except pod yield and
number of mature pods, for which, non additive gene effects were important.
To harness both the types of gene effects pedigree method followed by
selection in advanced generations will be fruitful.
Analysis of gca effects of parents revealed that JL-24 and ICG-7269
were good combiners for yield. Good combiners for specific traits were also
identified. Significant positive sca effects were recorded for the pod characters.
Relative heterosis, heterobeltiosis or standard heterosis were observed
for all characters in most of the crosses. Significant heterobeltiosis for yield
was observed in five crosses.
The dormancy studies in different generations revealed that dormancy
is dominant over non dormancy. The dispersed frequency distribution in F1 and
F 2 indicated that dormancy is a quantitative trait and multiple genes might be
controlling the trait.
The generation mean analysis' over six generations indicated that
predominantly non-allelic gene interactions were present for seed dormancy.
Hence pedigree method of breeding with selection from advanced generations
will be ideal for fixing the character.
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