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Studies on Intergenotypic Competition in a Wheat Multiline Using Alternative Row Design
Author(s) -
Prakish K. S.,
Gautum P. L.,
Rao B. P.
Publication year - 1987
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1987.tb01137.x
Subject(s) - biology , competition (biology) , genotype , grain yield , yield (engineering) , analysis of variance , agronomy , genetics , mathematics , statistics , ecology , gene , materials science , metallurgy
Differences between the isolines in a multiline may result in differences in competitive ability and lead to changes in the frequency of the components after a few cycles of multiplication. Alternative‐row design of H anson et al. (1961) was used to detect and characterize the presence of intergenotypic interactions among eight isolines of a multiline of bread‐wheat‘Kalyansona’. The material was grown in 1.5 meter row plots using a unique sequence of arrangement. The observations were recorded with respect to plant height and grain yield per plan:. The results of the analysis showed the components of variance for average competitive ability and specific combination to be highly significant, indicating the existence of intergenotypic interactions. Significant genotypic differences between isolines revealed that the genotype of the recurrent parent had not been fully reconstituted. On the basis of the effect of the border genotype averaged over all the genotypes (Ck.), the genotypes were classified into four groups, viz. a) highly depressive, b) mildly depressive, c) mildly cooperative and d) highly cooperative. Categories c and d were indicated as useful for the synthesis of multilines.