Vol. 9, Issue 1 (2021)
Combining ability and gene action of four seed yield contributing characters in onion (Allium cepa L.)
Author(s): R Ara and AC Deb
Abstract: For the improvement of onion seed yield mode of gene action is essential to know. Significant D indicated additive variations were greater in magnitude except umbel diameter and significant H1 indicated dominant variation for scape height and umbel diameter. Significant F indicating the presence of dominant genes only in number of umbel. H2 component is non-significant for all the characters except scape height. Non-significant h2 suggested dominance effect over all loci in the heterozygous phase was not important for number of umbel, scape height and umbel volume. Ratio [(4DH1) 1/2 + F] / [(4DH1) 1/2 – F] is greater than one for umbel volume indicated presence of an excess of dominant genes in the parents. For all the characters, ratio h2/H2 smaller than one indicated the involvement of at least one group of dominant genes. Parent P4 observed as good general combiner, F1 (P3 ´ P4, P1 ´ P2, P1 ´ P4, P1 × P5 and P1 × P3) and reciprocal crosses (P2 ´ P1, P3 ´ P1 and P4 ´ P1) for different traits recorded as the good specific combiners. So, this parent, F1 and reciprocal crosses need to special consideration for the improvement of onion yield.
DOI: 10.22271/chemi.2021.v9.i1a.11189
Pages: 01-07 | 1106 Views 273 Downloads
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How to cite this article:
R Ara, AC Deb. Combining ability and gene action of four seed yield contributing characters in onion (Allium cepa L.). Int J Chem Stud 2021;9(1):01-07. DOI: 10.22271/chemi.2021.v9.i1a.11189
