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Studies on the variability generated through biparental mating and selfing for yield and its component traits in barley (Hordeum vulgare L.)

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Title Studies on the variability generated through biparental mating and selfing for yield and its component traits in barley (Hordeum vulgare L.)
 
Creator Woldesilassie, Agdew Bekele
 
Contributor Verma, S.R.
 
Subject planting, yields, crossing over, grain, developmental stages, barley, genetics, biomass, genotypes, breeding methods
 
Description The present investigation entitled “Studies on the variability generated through biparental mating and
selfing for yield and its component traits in barley (Hordeum vulgare L.)” was conducted to examine the
extent of genetic variability generated through biparental mating and selfing for yield and related
components. Sixty plants from every cross of barley (IBON-W-61 x DWR91, BH935 x BH902 and
BH902/DWRUB64) were randomly selected and crossed as well as selfed to generate 30 BIPs and 30
selfed progenies in 2012-13. In 2013-14 those progenies were grown in a compact family block design
with three replications. Plots and plants were spaced 30 and 15cm, respectively and all the necessary
agronomic recommendations were applied. Data were recorded on days to heading, days to maturity,
plant height, spike length, grain/spike, effective tiller number per plant, biomass yield per plant, grain
yield per plant, harvest index and 1000-grain weight. Data were subjected to statistical analysis including
descriptive (mean & range) and ANOVA. The variability parameters GCV, PCV, broad sense heritability
and genetic advance were estimated following their standard procedures. The genotypic and phenotypic
correlation coefficients were calculated between pair of characters. The analysis of variance showed that
there was significant variation in both F3 and BIPs families for almost all traits in three crosses. When
comparing the BIPs and selfed progenies performance for most of the traits the mean values of the
characters were higher in BIPs than in F3. Except in cross I, the wider range for almost all the characters
was also observed for the BIPs. The phenotypic and genotypic coefficient of variation were higher in
BIPs for grains per spike, biomass yield per plant, grain yield per plant & days to heading in cross II; and
for effective tiller number per plant, biomass yield per plant, grain yield per plant, harvest index and
1000-grain weight in cross III while the PCV and GCV values were higher for all traits in F3 in cross I.
Similarly, higher H2and genetic advance as percent of means followed the same pattern as PCV and
GCV in every cross. Intermating significantly contributed to grain yield and malt quality parameters as
compared to selfed. When correlation of traits were compared between BIPs and F3 as many as 20, 16
and 14, new association appeared in crosses I, II, and III, respectively. This association involved
significant reduction or significant improvement in BIPs compared to selfed. From the study it can be
concluded that intermating has improved mean performance and variance of characters by breaking
linkages between genes and resulted in breakage of coupling phase and repulsion phase linkages that led
to decreased and increased correlations, respectively.
 
Date 2016-02-06T11:54:56Z
2016-02-06T11:54:56Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64187
 
Language en
 
Format application/pdf
 
Publisher CCSHAU