Basic HTML Version
Triticeae Genomics and Genetics 2014, Vol.5, No.1, 1-6
http://tgg.biopublisher.ca
6
The dominance (h) and dominance × dominance (l)
effects were in the opposite direction indicating
predominantly dispersed alleles at the interacting loci
and suggesting that duplicate – type epistasis
( D
#
) ,reported by Jinks J. L.(1958) occurred in most
cases. In cross, DL88 × K560 for days to maturity and
grain yield/plant, cross RD2552 × NDB 1020 for
length of main spike were observed with
complementary epistasis (C
@
). This suggested the
possibility of considerable amount of heterosis in
these two crosses for days to maturity, grain
yield/plant and 1000-grain weight. On the basis of
present study, it could be concluded that grain
yield/plant and the component characters like days to
ear emergence, , no. of effective tillers/plant, , days to
maturity, weight of grains/main spike, no. of grains/
spike, 1000-grain weight were mainly under the
control of non-additive gene action viz ., dominance
(h) gene action and dominance × dominance (l) gene
interaction which indicated their poor amenability to
simple selection procedure, under such a situation,
maximum gain could be achieved by maintaining
considerable hetrozygosity through inter-mating of
selected plant in early segregating generation or by
fallowing some form of recurrent selection reported
by Parlevliet J.E. and Van O.A (1988). This will
increase the possibility of various recombinants,
which may result in accumulation of favorable genes
in the ultimate homozygous line with higher grain
yield. Therefore, few cycles of recurrent selection
followed by pedigree breeding will be effective in the
improvement of 1000-grain /plant in barley.
References
Bhatnagar V.K., Sharma S.N., and Sastry E.V.D., 2001, Genetics of
quantitative characters in six-rowed barley over environments, Indian J.
Genet., 61: 358-359
Hayman B.I., 1958, The separation of epistatic from additive and dominance
variation in generation means, Heredity, 12: 371-390
http://dx.doi.org/10.1038/hdy.1958.36
Jinks J.L. and Jones R.M., 1958, Estimation of components of eterosis,
Genetics, 43:223-224
Jinks J.L. and Jones, R.M., 1958, Estimation of the components of heterosis,
Genetics, 43: 223-234
Kularia R.K. and Sharma, A.K., 2005, Generation mean analysis for yield
and its component traits in barley (
Hordeum vulgare
L.), Indian J.
Genet., 65 (2): 129-130
Mather K., 1949, Biometrical Genetics. Mather and Co., London.
Panse V.G., and Sukhatme, P.V., 1967, Statistical methods for agricultural
workers. Indian Council of Agricultural Research, New Delhi
Parlevliet J.E., and Van O. A., 1988, Recyrrent selection for grain yield in
early generations of two barley populations. Euphytica,38: 175-184
http://dx.doi.org/10.1007/BF00040189
Prakas, V., Saini, D.D. and Singh, R.V., 2004, Estimation of gene effects for
grain yield and its components in barley (
Hordeum vulgare
L.), Indian
J. Genet., 64 (1): 69-70
Prakash V., Singh, R.V. and Saini, D.D., 2005, Gene action for grain yield
and its related traits in barley (
Hordeum vulgare
L.). Crop Improv.,
32
(1): 40-43
Sharmila V., Ganesh S.K. and Gunasekaran M., 2007, Genration mean
analysis for quantitative traits in sesame (
Sesamum indicum
L.) crosses.
Genetics and Molecular Biology,30: 80-84
http://dx.doi.org/10.1590/S1415-47572007000100015
Vimal S.C., and Vishwakarma, S.R., 1999, Gene effects controlling yield
components in barley (
Hordeum vulgare
L.), Rachis: Barley and Wheat
Newsletter, 18 (2): 21-25