The effect of a high selection intensity on the change of maize yield components' additive variance

Deletic, N.; Stojković, S.; Djuric, Vladan; Gudžic, S.; Biberdžic, M.

doi:10.2298/gensr0501071d

Cited by 2 publications

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“…The excepted genetic advance was high as a percent for grain yield/plant and the value reached 20.50%. These results are in agreement with studies of Deletic et al (2005); Cook and Hallauer (2008) Hamed (2008); and . Table (6) presents estimates of heterosis for all the studied characters.…”

Section: Resultssupporting

confidence: 92%

“…Many researchers and plant breeders used the inbred lines of maize in diallel cross analysis (Ojo et al, 2001;Al-Sweediy, 2002;Reza'ei et al,2004;Al-Jamili ,2006 ;Chungji et al, 2006;Rather et al, 2007 and. Many studies were conducted concerning heritability for characters in different crops, Deletic et al, (2005) and Najeeb et al, (2009) obtained high heritability for the most characters, while Cook and Hallauer and Miranda (1988) and Dawod et al (2009) showed that the average dominance was less than one for all characters except the grain yield/plant, which reached 1.7. Paterniani et al (2004) found that the best expected genetic advance in grain yield reached 7.9 %.…”

Section: Introductionmentioning

confidence: 99%

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Genetic Analysis of Diallel Crosses Between Five Moderately Maturing Inbred Lines of Maize

Hussain

Ali

2010

Egyptian Journal of Agricultural Sciences

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This study was conducted during the spring season of 2008 at the Farm of the College of Agriculture -Duhok University, Iraq by using five maize inbred lines locally developed. Half diallel cross design was applied for these inbred lines to produce ten F 1 single crosses. A yield trial for the 10 hybrids and their parents was carried out in the Research Farm of the College of Agriculture Salahaddin University, Iraq using a randomized complete block design with three replications in order to study the gene action for yield and yield components beside estimating heterosis, combining ability and variance components (additive, dominance and environmental variance) in addition to estimate some other genetic parameters. The results showed the presence of significant differences among genotypes for all characters. For mean grain yield the best parent was (ZP -197), while the best hybrid was (ZP -707 × DK). The parent (ZP -595) appeared to be the best general combiner for most studied characters, while the hybrid (ZP -607) × (ZP -707) appeared to be the best for specific combining ability. Ratio of general to specific combining ability variances was more than one for all characters, indicating that the characters were under the effect of over dominance. Broad sense heritability value was found to be high in all the studied characters, while the narrow sense heritability was moderate for silking and tasselling date, grain yield / plant, number of kernels / row , 100-kernel weight and low for plant height , ear height , leaf area , number of rows / ear, ear length and number of kernels / ear. The expected genetic advance from selection was high for grain yield / plant and 100-kernel weight. The hybrids (DK × ZP-197) and (ZP -707 × ZP -197) gave the highest heterosis value in silking and tasselling date, while the heterosis value was high for the flag leaf area, ear height and grain yield / plant and was low for kernels / row , rows / ear, ear length and 100-kernel weight with different hybrids.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Genetic Analysis of Diallel Crosses Between Five Moderately Maturing Inbred Lines of Maize

Hussain

Ali

2010

Egyptian Journal of Agricultural Sciences

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The change of genetic and phenotypic variability of yield components after recurrent selection of maize

et al. 2009

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This paper deals with 31 SSD lines from ZP-Syn-1 C0 and 37 from ZP-Syn-1 C3 maize populations. After line selection and seed multiplication in the first year of the study, the trials were set during two years in Kruševac and Zemun Polje, in RCB design with three replications. Additive and phenotypic variances of yield components were calculated, as well as the estimation of genetic variability narrowing by multivariate cluster analysis. The differences in additive and phenotypic variances between the cycles were significant for ear length only and highly significant for grain row number per ear and for percent of root and stalk lodged plants. It means, a significant narrowing of additive and phenotypic variance occurred only for those three traits, and the other traits did not change their variability by selection in a significant manner. However, according to cluster analysis, distances among genotypes and groups in the zero selection cycle were approximately double than in the third one, but group definition was better in the third selection cycle. It can suggest indirectly to a total variability narrowing after three cycles of recurrent selection

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The effect of a high selection intensity on the change of maize yield components' additive variance

Cited by 2 publications

References 1 publication

Genetic Analysis of Diallel Crosses Between Five Moderately Maturing Inbred Lines of Maize

Genetic Analysis of Diallel Crosses Between Five Moderately Maturing Inbred Lines of Maize

The change of genetic and phenotypic variability of yield components after recurrent selection of maize

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