Estimates of genetic variances and relationship among traits associated with stem borer resistance in maize (Zea mays L.)

Oloyede-Kamiyo, Qudrah Olaitan; Ajala, S. O.; Akoroda, M. O.

doi:10.1016/j.fcr.2014.05.014

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…Moderate to high heritability values mean that the genes that play a role in the appearance of these traits are additive. If an additive gene plays a trait, this indicates that the trait is more easily inherited from parents to offspring [40]. Likewise, such traits can be selected for early generations.…”

Section: Heritability and Genetic Advancementioning

confidence: 99%

Genetic parameters of various local corn cultivars in high salinity stress

Samudin,

Jeki,

Maemunah

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Future demand for maize will not be easily met due to climate change and its development using marginal soils that are stressed by salinity. This study aims to identify the genetic parameters of corn plants under high salinity stress. The research was arranged in a randomized completely block design (RCBD) consisting of six local maize cultivars, namely Gento, Lanca, Pulut, Lokal, Lei, and Sigi Merah. Each treatment was repeated four times. The results showed that two traits had a high coefficient of genotypic diversity, four traits had a high coefficient of phenotypic diversity and six traits had high heritability and genetic progress. Plant height, the greenness of the leaves, age of male flower release, age of blooming female flowers, the position of the ear, harvest age, length of cob without stalks, and diameter of the cob were positively and significantly correlated with yield. Plant height and cob height can be used as criteria for increasing maize yields through indirect selection. In future studies suggest that various local maize cultivars can be applied to situations of high salinity stress.

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Section: Heritability and Genetic Advancementioning

confidence: 99%

Genetic parameters of various local corn cultivars in high salinity stress

Samudin,

Jeki,

Maemunah

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Moreover, knowledge on the degree of genetic variability present among genotypes and the association of quantitative characters with yield is vital for any crop improvement program and also to develop suitable selection strategies ( Ene et al, 2016 ). On the other hand, the estimation of genetic variances helps plant breeders to choose the most efficient breeding design for improving crops with the existing resources ( Oloyede-Kamiyo, Ajala & Akoroda, 2014 ). Such information is scanty owing to the limited work done by the Ethiopian potato breeding program within the existing genetic pool in the country.…”

Section: Introductionmentioning

confidence: 99%

Genetic variability studies for tuber yield and yield attributes in Ethiopian released potato (Solanum tuberosum L.) varieties

Tessema

Mohammed

Abebe

2022

PeerJ

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Information on the extent of genetic variability and association among quantitative traits are vital for any crop improvement program and the development of suitable selection strategies. Limited research has been carried out thus far on potato genetic variability and trait association. This study on genetic variability and association among quantitative traits was conducted to assess the extent of genetic variability among yield and agronomic traits to identify superior varieties for the breeding program. To this effect, 20 improved varieties and a local cultivar were planted at two locations in central Ethiopia during the main cropping season of 2017/18 in a randomized complete block design using three replications. Analysis of variance of tuber yield and yield traits at each location and over locations, revealed the existence of highly significant (P < 0.01) differences among varieties in all agronomic and yield traits. Phenotypic coefficient of variation values ranged from 0.75% (specific gravity) to 32.22% (total starch yield) while the genotypic coefficient of variation values ranged between 0.70% (specific gravity) to 30.22% (total starch yield). Maximum difference between phenotypic and genotypic coefficient of variation values were noted for stem number, average tuber number, average tuber weight, number of leaves per plant and tuber yield. Hence, these traits are substantially influenced by the physiological status of the seed tuber at planting and by the environment, post emergence. Range of variability for most of the traits was high, indicating ample scope for selection and improvement in these traits. The estimated values for broad sense heritability and genetic advance, as percent of mean, ranged from 33.52% to 98.66% and 1.35% to 58.26%, respectively. All the traits had high heritability values, except average tuber number per hill, days to physiological maturity, average tuber weight and number of leaves per plant with moderate heritability values.

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“…root fresh yield (RFY), root dry yield (RDY), harvest index (HI), fresh biomass yield (FBY), vine yield (VNY), protein (PRO), and starch (STA)] in selected families of F 3 yam bean populations. According to Oloyede-Kamiyo et al (2014), the estimation of genetic variances helps plant breeders to choose the most efficient breeding design for improving crops within the available resources. The information from the current study will inform breeders to select appropriate breeding procedures and design effective yam bean improvement programs targeting high yielding and high dry matter yam bean cultivars for adoption in Africa.…”

Section: Introductionmentioning

confidence: 99%

Genetic variation and response to selection for storage root dry matter and associated traits in a population of yam bean (Pachyrhizus spp.) interspecies crosses

et al. 2021

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The goal of yam bean improvement in Africa is to develop superior high yielding and high dry matter cultivars that are preferred for adoption. In this study, the estimates of variance components, heritability and response to selection were studied in F3 yam bean families selected from interspecies crosses targeting improvement of storage root dry matter and associated traits. Breeding populations were generated using North Carolina II (NC II) mating design involving high dry matter P. tuberosus chuin cultivar, low dry matter P. ahipa and the high yielding P. erosus yam beans. The progenies were advanced through selfing from F1 to F2 population and then exposed to selection at 10% selection intensity to obtain 83 high dry matter lines. The selected lines were evaluated in an F3 trial using a randomized complete block design (RCBD) with three replications at the National Crops Resources Research Institute (NaCRRI) Namulonge, in Central Uganda. The results revealed significant (P < 0.001) genetic variation for storage root dry matter (RDM), storage root fresh yield (RFY), storage root dry yield (RDY), vine yield (VNY), fresh biomass yield (FBY), harvest index (HI), starch (STA) and protein (PRO) content. High genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were obtained for VNY, RDY, FBY, RFY, RDM and STA. Narrow sense heritability was higher than 0.5 and response to selection was 15.5 to 33.1 for RDM, RFY, RDY, VNY, FBY and STA, indicating rapid genetic progress is achievable and early generation selection would be effective to improve these traits. Significant (P < 0.01) positive genetic correlations were observed between RDM, RDY, RFY, VNY, FBY and STA ranging from 0.422 to 0.963 implying that simultaneous improvement of these traits is possible in the current yam bean populations.

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Estimates of genetic variances and relationship among traits associated with stem borer resistance in maize (Zea mays L.)

Cited by 4 publications

References 21 publications

Genetic parameters of various local corn cultivars in high salinity stress

Genetic parameters of various local corn cultivars in high salinity stress

Genetic variability studies for tuber yield and yield attributes in Ethiopian released potato (Solanum tuberosum L.) varieties

Genetic variation and response to selection for storage root dry matter and associated traits in a population of yam bean (Pachyrhizus spp.) interspecies crosses

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