Open AccessJournal Article
Combining ability for grain yield and some important agronomic traits in Maize (Zea mays L.)
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These inbred line probably have potential as parents of hybrid varieties, as well as for inclusion in breeding programmes, since they may contribute superior alleles in new populations for high grain yield.Abstract:
The 15 hybrids along with the parents evaluated in field under normal condition to determine the combining ability for grain yield and other agronomic traits in maize (Zea mays L.) at two years 2011 and 2012, using RCBD with three replications. Results of combined ANOVA revealed that year effect was significant for all the parameters. Based on diallel cross analysis according to Griffing method 2, the general combining ability (GCA) and Significant specific combining ability (SCA) were significant for all the traits and so in the inheritance of all the parameters, additive and non additive gene action are important. The GCA×year interaction effects were significant for plant height, ASI and grain yield. The SCA×year interaction effects were significant for days taken to tasseling, ASI and grain yield. This indicates high variability among the parents and crosses in their responses to different conditions changes in both years. The GCA/SCA variance ratio exhibited that all traits were predominantly under non-additive control and non-additive effects played a more important role than additive effects in all the parameters. Based on GCA effects (gi), σ 2 gi , σ 2 si and per se performance for each parent, SD\17 line for 100 grain weight, ASI and grain yield, SD\15 line for number of rows per ear, SD\10 line for number of kernels per row was suitable resources to increase grain yield. Therefore these inbred line probably have potential as parents of hybrid varieties, as well as for inclusion in breeding programmes, since they may contribute superior alleles in new populations for high grain yield. Furthermore, SD\3×SD\704 and SD\17×SD\704 proved to be the best crosses to increase grain yield.read more
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Estimation of combining ability and superiority percentage of half diallel crosses between yellow maize inbred lines for growth characters and some diseases resistance
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References
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Journal ArticleDOI
Concept of general and specific combining ability in relation to diallel crossing systems
TL;DR: In this paper, a detailed examination of combining ability in relation to diallel crossing systems is made, and eight different analyses are presented, with two alternative assumptions with regard to the sampling nature of the experimental material.
Journal ArticleDOI
The Theory and Analysis of Diallel Crosses. III.
TL;DR: The purpose of this article is to study more general genetic systems using new methods and more generations and an investigation of gene correlation in the parents together with some consideration of linkage and parental heterozygosity.
Journal ArticleDOI
Issues in Diallel Analysis
TL;DR: As an alternative to genetic interpretation, the statistical description provided by dialiel analysis can be used to help answer questions concerning the importance of specific combining ability and the predictability of hybrid performance using general combining ability or parental performance.
Journal ArticleDOI
The analysis of continuous variation in a diallel cross of nicotiana rustica varieties
Book ChapterDOI
Using genotype-by-environment interaction for crop cultivar development
TL;DR: The chapter discusses the causes of genotype-environment interaction and how to deal with it, stability statistics, and ways to exploit or minimize interaction.