YIELD PERFORMANCE WITH HERITABILITY MEASUREMENTS OF HALF SIB FAMILIES OBTAINED FROM MAIZE VARIETY AZAM (original) (raw)
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This experiment was conducted to evaluate the performance of 196 half sib families (HSF) derived from Sarhad White variety of maize at the Research Farm of Agricultural University, Peshawar using partially balanced lattice square design with two replications. Results indicated significant differences among HSF for all the studied traits, except grain yield. Among the 196 families, maximum days to tasseleing (58), silking (59) and anthesis (59) were recorded for HSF-58 and HSF-21, respectively. Maximum plant height (197 cm) was observed for HSF-11 while minimum (104 cm) was recorded for HSF-105 and 145. Minimum ear height (44 cm) was observed for HSF-61 while maximum (102.5 cm) was recorded for HSF-27. Highest kernel rows ear -1 (19) was observed for HSF-152 whereas, minimum (11) was recorded for HSF-134 and HSF-182. Maximum 100 grains weight (42.9.6 g) was expressed by HSF-23 while minimum (23.05 g) was exhibited by HSF-132. Highest grain yield (11018.5 kg ha -1) was recorded for HS...
Genetic Analysis of Pooled Variation and Heritability in Maize Inbred Lines and Hybrids
Genetic variability is of greatest interest as it plays a vital role in framing successful breeding programme. Improvements in yield can be achieved by selection for grain yield, 1000 grain weight, plant height, ear height information helps a plant breeder to ensure efficient cultivar selection and screening of available sources of maize germplasm i.e. maize inbreds and hybrids involving two or more characters simultaneously for desirable attributes. The present study was therefore initiated to screen out different maize inbreds and hybrids for variability of yield and yield components. The experiment was carried out involving a set of 60 crosses along with 19 parents and three checks for estimating variability and heritability for yield and its attributing traits at three locations during kharif 2012, rabi 2012-13 and kharif 2013. The mean values of parents, hybrids and standard checks for eleven characters pooled over three locations are presented character wise. Wide range of variation was recorded for various traits indicating immense scope of selection for improvement. Genotypes in pooled analysis recorded a general mean of 51.10 days with a range of 44.89 to 60.22 days for days to 50 per cent tasseling. The mean number of days to maturity varied from 79.11 to 97.00 days with a mean of 86.03 days. The ear length in pooled analysis ranged from 9.22 to 20.33 cm with a general mean of 16.37 cm. The parents ranged from 9.22 to 18.22 cm while that of hybrids ranged from 14.89 to 20.33 cm. The grain yield of parents ranged from 36.00 to 126.78 g while for crosses, it varied from 108.44 to 170.67 g. High narrow sense heritability recorded for days to 50 per cent silking, days to 50 per cent tasseling, days to maturity, ear height, number of kernels per row and 100-seed weight indicated that these traits are predominantly under the control of additive gene action and can be improved by selection.
Sample size for single, double and thee-way hybrid corn ear traits
Scientia Agricola, 2007
Using adequate sample size in experimental units improves the efficiency of the research. In the agricultural year of 2004/2005, an experiment was conducted in Santa Maria, Rio Grande do Sul State, Brazil, with the objective of estimating sample size for the following traits: ear length, ear and cob diameter, ear weight, weight of grains per ear, cob weight and the weight of 100 grains, number of grain rows per ear, number of grains per ear and length of grains for two single hybrids (P30F33 and P Flex), two threeway hybrids (AG8021 and DG501) and two double hybrids (AG2060 and DKB701) of maize. For a 5% (D5) precision, the weight traits (dehusked ear weight, weight of grains per ear, cob weight and weight of 100 grains) can be sampled with 21 ears; the size traits (ear length, ear diameter, cob diameter and grain length) with eight ears; and the number traits (number of grain and rows) with 13 ears. Sample size varies as a function of ear trait and the type of hybrid i.e. single, three-way or double. Genetic variability among ears does not correspond to the increasing genetic variability i.e. single, three-way and double for the sample size of traits per ear.
Components of genetic variability and heritability of the number of rows per ear in silage maize
Biotechnology in Animal Husbandry, 2005
The aim of this study was to estimate the following components for the number of rows per ear in silage maize: variability of inbred lines and their diallel hybrids, superior-parent heterosis and components of genetic variability and heritability on the basis of diallel hybrids. It was determined that the variability of this trait was significantly affected by a genotype, year and their interaction. Inbred lines ZPLB 402, ZPLB 403 and ZPLB 405 had a higher number of rows per ears than majority of hybrids in both years of investigation, which resulted in negative values of heterosis. The analysis of components of genetic variance indicates that the additive component (D) was higher that the dominant (Hi and H2) genetic variance while a positive value of the component F and frequency of dominant (u) and recessive (v) genes for the observed trait point out that dominant genes prevailed over recessive ones. Furthermore, this is confirmed by a dominant to recessive genes ratio in parenta...
Heritability and Genetic Advance for Grain Yield and its Component Characters in Maize (Zea Mays L.)
International Journal of Plant Research, 2012
Knowledge of the magnitude of genetic variability, heritability and genetic gains in selection of desirable characters could assist the plant breeder in ascertaining criteria to be used for the breeding programmes. Ten open pollinated maize varieties were evaluated at the Teaching and Research farm, University of Ilorin, Nigeria, during 2005 and 2006 cropping seasons to estimate genetic variability, heritability and genetic advance of grain yield and its component characters. The effect of genotype and genotype by year interaction were significant for ear weight and grain y ield, while the effect of year was highly significant (P< 0.01) for all the characters. High magnitude of phenotypic and genotypic coefficient of variations as well as high heritability along with high genetic advance recorded for grain yield, number of grains ear-1 , ear weight, plant and ear heights provides evidence that these parameters were under the control of additive gene effects and effective select ion could be possible for improvement for these characters. Tze Co mp3 C2, Acr 94 Tze Co mp5, Tze Co mp 4-Dmr Srbc2 and Acr 90 Pool 16-Dt were identified as outstanding genotypes for maize grain yield and should be tested at mu ltilocation for their y ield performance.
Estimation of Some Genetic Parameters, Correlation and Heritability in Various Maize Traits
Science Journal of University of Zakho, 2017
The study was carried out using ten maize hybrids in spring 2015 and 2016 were planted at the field of Agriculture College, University of Duhok. All treatments arranged in Randomized Complete Block Design (RCBD) with three replications to determine the heritability, genetic advance, correlation and genetic parameters govering the inheritance of grain yield and related agronomic traits. The result showed significant difference among hybrids for studied traits in spring 2015 and 2016 and also the results revealed that hybrids and seasons interaction had a significant difference for all traits. The season’s spring 2015 was superior than spring 2016 in leaf area, days to 75% tasseling and silking, yield and its components. The hybrid (OH40 xIK8) was superior in No. of rows ear-1, No. of kernels row-1,300 kernel weight and kernel yield plant1. All studied traits recorded higher value of heritability, high genetic advance coupled with heritability was observed in leaf area and kernel yiel...
Beni-Suef University Journal of Basic and Applied Sciences, 2022
Background: The improvement of maize hybrids relies on significant genetic variability among the inbred lines used and the degree to which it is transferred to progeny. Understanding the genetic parameters and heritability of traits in every population is an essential precondition for selection program. This study was designed to estimate the magnitude of genetic parameters and heritability of traits in line × tester mating design. Fifteen yellow maize inbred lines derived from different sources were crossed with two lines as tester i.e., Gm-1001 and Gm-1002 in 2019 summer season. During 2020 season, the resulted 30 crosses along with check hybrid SC-168 were evaluated in a yield trial at two locations: Gemmeiza and Sids Agric. Res. Station. Results: The mean squares among two locations were highly significant for all studied traits except KR −1. The L 1 and L 3 had the best general combiners for GY ard fed −1. In addition, the T 1 as a tester was a GCA effects good combiner for earliness, shorter plants and lower ear placement traits. While T 2 was good combiner for grain yield and some of attributes. Crosses L 5 × T 1 and L 7 × T 2 had positive and significant SCA effects for grain yield. The GCA variances were higher than SCA variances for all studied traits except for ED trait, indicating that additive genetic variance played the major role than non-additive genetic variance in the inheritance of these traits. Generally, phenotypic coefficient of variability was higher than genotypic coefficient of variability for all studied traits, suggesting that there was an influence by environments in the expression of these traits. Recorded heritability percentage in broad sense ranged from low for (ear position%, no. of ears/100 plants, ear diameter and grain yield) traits, medium for (days to 50% silking, plant height, ear height and no. of kernels/row) traits to moderate high for ear length trait. Conclusion: Our investigation concluded that most of the studied lines exhibited highly general combiners and the superior crosses were as a result of a good × good combiner for most of yield components traits.
Change in heritability estimates due to half-sib family selection in the maize variety Pahari
Genetics and Molecular Research, 2013
This research was carried out at the Agriculture Research Farm, Khyber Pakhtunkhwa (KPK), Agricultural University Peshawar (AUP), and the Cereal Crops Research Institute (CCRI), Pirsabak, Nowshera, during 2009 and 2010. Half-sib families (HS) derived from the maize variety Pahari in spring crop seasons 2009 and 2010 were developed at CCRI. All HS families were detasseled well before pollen shedding. At maturity, each family was harvested and shelled separately. During the summer crop of seasons 2009 and 2010, these HS families were evaluated in 12 x 12 and 11 x 11 partially balanced lattice square arrangements at KPK AUP for various flowering and yield traits, respectively. The data on days to mid-silking, anthesis, anthesis-silking interval, 100-grain weight, and grain yield were recorded. The results revealed significant differences ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research (2013) Ahead of Print M. Noor et al.