Assessment of genetic divergence in diverse maize (Zea mays L.) genotypes

Sharma, Radheshyam; Maloo, S. R.; Joshi, Arunabh; Choudhary, Sharda

doi:10.18805/ijare.v49i5.5816

Cited by 5 publications

(6 citation statements)

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“…Maize was first domesticated in Mexico, from its wild species ancestor, teosinte, about 9000 years ago, but maize landraces are widely found across the continents (Gaikwad et al, 2016). Landraces (germplasm) evolved conventionally over the time, not only provides basic nutritional requirements as a food security but also in crop improvement programmes very much depend on the availability of a wide and reliable crop genetic diversity (Sharma et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Genetic variation and association study for grain yield in germplasm accessions of maize (zea mays L.)

Shukla

2017

IJARe

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The present investigation aimed to find out the association among yield and its components and to sort out the traits that are directly or indirectly contributing towards yield in landraces of maize genotypes. The eighty eight (88) maize germplasm collections were used in present study during Kharif -2012 and Kharif -2013 in RCBD design. Pooled data and standard statistics were employed (means, ranges, GM±SE, standard error and coefficient of variation etc.) for analysis of the seventeen quantitative traits to have a reflection of the level of genetic variability. A considerable amount of variability was found among germplasms for various important traits viz. plant height, ear weight, ear length, 1000 kernel weight similarly grain yield per plant etc. grain yield exhibited positive and highly significant correlation with ear height, days to female flower initiation, days to 50% male flower initiation, days to 50% female flower initiation, days to maturity, 1000 grain weight, ear weight at genotypic and phenotypic level. Maximum phenotypic correlation coefficient was recorded by cob diameter (0.955) followed by days to female flower initiation (0.758), plant height (0.718 * ) and days to male flower initiation (0.679).Path analysis indicated that the character ear height (0.410) recorded highest of the direct effect followed by biological yield per plant (0.408), harvest index (0.328), days to female flower initiation (0.32), prop root (0.149) and 1000 kernel weight (0.136), so such traits may be rewarding and they should be given importance while practicing selection, aimed at improving grain yield per plant in maize. The genotypes JLM 22 was to be found best for high yield by considering all yield contributing traits followed by JLM 51, HKI 1344, CML 429, CML 470, JLM 30 JLM 2 and these can be utilized in further breeding programmes for producing single cross hybrids in Maize.

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Section: Introductionmentioning

confidence: 99%

Genetic variation and association study for grain yield in germplasm accessions of maize (zea mays L.)

Shukla

2017

IJARe

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“…Higher grain yield plant -1 among the maize lines indicates the potential of specific lines to convert the photosynthates into dry matter. Plant breeder could utilize the valid morphological differences indicating existing inheritable genetic variability among the maize lines already existing in the material to facilitate and maintain long term future breeding programmes (Ahmad et al, 2011;Sharma et al, 2014). However, Singh and Chauhan (2010) reported nonsignificant differences for maize lines for grain yield.…”

Section: Grain Yield Plant -1mentioning

confidence: 99%

Evaluation of genetic variability and interrelationships among M3 and M4 maize inbred lines in Kenya

Mallu¹,

Wesonga²,

Githiri³

et al. 2021

Adv. J. Plant Biol.

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The present study was conducted at Jomo Kenyatta University of Agriculture and Technology, Juja to assess the agronomic performance of mutant maize lines of 39 filial generation 3 (M3) and filial generation 4 (M4) maize lines and a check variety among agro-morphological traits with their association with grain yield. Data on various agro-morphological characters were recorded using morphological descriptors for maize and analyzed using Genstat Release 14.1. Data was also subjected to XLSTAT 2014 and DARwin 6.0.12 software for principal and cluster analyses. Results obtained differed significantly in herbicide tolerance days for both M3 and M4 (p≤0.01). However, plant height, maturity days, flag leaf length and width, grains ear-1, ear length, ear diameter and grain yield plant-1 differed significantly in M3 and M4 lines (p≤0.05). Grain yield plant-1 showed a strong significant positive correlation with anthesis days, plant height, grains ear-1 and ear diameter and length but negatively correlated with days to pollen shedding, tasseling, maturity and tolerance in M3 while flag leaf width, harvestable and total ears plant-1 showed positive and significant correlation but negatively correlated with tolerance days in M4. Principal component analysis showed variations among mutated maize lines in M3 and M4 with first seven principal components (PC) indicating that the first six PCs explained 78.69% and first six PCs contributing 71.28% respectively of the total variation. Cluster analysis showed three clusters and seven sub-clusters indicating differences in morphological diversity among the M3 inbred lines and two clusters with cluster one of hybrid 513 and three sub-clusters in cluster two of hybrid 520. Plant height, flowering days and ear length were crucial phenological traits determining grain yield among herbicide tolerant lines showing significant variability that could be considered in hybridization and development of herbicide tolerant hybrid genotypes in future maize breeding programmes.

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“…The low yield is caused by the use of poor varieties, abiotic and biotic constraints, low soil fertility, poor agronomic management and uncertain input supply (Lisuma et al, 2006). There is a need to identify adaptive maize breeding materials that possess traits with high potentials to be used by maize breeders to develop superior cultivars (Sharma et al, 2015). Successful plant breeding requires a more careful choice of genotypes that would be used to develop desirable recombinants (Toshimenla et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of agronomic performance of local and improved maize varieties in Tanzania

Kabululu

Feyissa

Ndakidemi

2017

IJARe

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<span>Fifty Tanzanian local maize cultivars, seven popularly grown commercial varieties in Tanzania and eleven elite lines from CIMMYT, Nairobi, Kenya were evaluated for agronomic performance. The genotypes were subjected to randomized complete block design at three sites in 2015, both conducted at Arusha region, in Tanzania. The analysis identified highly significant variances among genotypes evaluated and their interactions with environments. The GGE biplot analyses identified the winning genotypes on mean yield and stability. An open pollinated variety (OPV) Situka 1 and an hybrid DH 04 had generally the best performance in terms of grain yield and stability across all three locations. A local cultivar TZA 2793 emerged to be the promising landrace with overall appealing yield and stability performance. The obtained information through this current study may be a good source of new allelic diversity that could be used for developing different important elite maize materials.</span>

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Assessment of genetic divergence in diverse maize (Zea mays L.) genotypes

Cited by 5 publications

References 0 publications

Genetic variation and association study for grain yield in germplasm accessions of maize (zea mays L.)

Genetic variation and association study for grain yield in germplasm accessions of maize (zea mays L.)

Evaluation of genetic variability and interrelationships among M3 and M4 maize inbred lines in Kenya

Evaluation of agronomic performance of local and improved maize varieties in Tanzania

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