GGE BIPLOT ANALYSIS FOR YIELD PERFORMANCE OF GRAIN AMARANTH GENOTYPES ACROSS DIFFERENT ENVIRONMENTS IN WESTERN INDIA (original) (raw)
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Evaluating amaranthus genotypes in different locations is a key task for amaranthus improvement programs. Generally, at the farmers' level steady and high yielding genotypes that were identified are recommended for cultivation. For this purpose, 13 amaranthus genotypes were subjected to stability analysis to determine the nature and extent of genetic stability for three consecutive years viz 2018, 2019 and 2020 across two locations, Dolakha; and Jumla for grain yield and yield components. A randomized complete block design (RCBD) was used in this study with two replications for the identification of stable and high yielding genotypes. Genotype and environment (G × E) interactions and stability analyses were performed for yield and yield components in a particular location. The results showed that genotype (G), environment (E) and their interaction (G × E) at a 0.05% probability level of 0.05, significantly influenced the grain yields of amaranthus genotypes. Genotypes ACC#10 (bi = 1.16) and ACC#2 (bi = 1.81) with more than unity regression indicated the genotype's suitability for favorable conditions. As shown by the GGE biplot, the under-tasted environment genotype ACC#10 was stable. Thus, to improve the production of amaranthus in the mid hill environments of Nepal, this genotype was put forward for release as a variety.
GENETIC VARIATIONS IN YIELD AND YIELD CONTRIBUTING TRAITS OF GREEN AMARANTH
GENETIKA, 2020
Rashad M. M. I. and U. Sarker (2020): genetic variations in yield and yield contributing traits of green amaranth.-Genetika, Vol 52, No1, 393-407. The experiment was carried out at the experimental farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during 2015 using twenty promising genotypes (AA21 to AA40) of green amaranth in Randomized Complete Block Design (RCBD) with three replications to study the variability, genetic parameters, association of yield related morphological traits to foliage yield and to find out the direct and indirect effects of components characters towards foliage yield. The significant analysis of variance revealed wide range of variability among the twenty genotypes of green amaranth. Except for stem diameter, foliage yield and all the yield contributing morphological traits had high heritability including high genetic advance in percent of mean, high to moderate genotypic and phenotypic variances and coefficient of variations with minimum differences of PCV and GCA indicated that the traits were governed by additive gene actions and had a great scope of selection for the improvement of green amaranth. Correlation study revealed that total biomass and shoot weight showed significant association with foliage yield per m 2. Hence, selection based on total biomass and shoot weight could remarkably improve the foliage yield of green amaranth. However, the path coefficient analysis revealed that shoot weight had the highest positive direct effect (1.19) with significant genotypic correlation on foliage yield. It indicated that direct selection based on shoot weight would be effective for the improvement of foliage yield of green amaranth. Mean performance study revealed that the genotypes, such as AA21, AA22, AA24, AA25, AA27, AA28, AA31, AA36 and AA39 had high foliage yields including most of the yield related morphological traits over the grand mean. These genotype could be selected as high yielding varieties or parental lines for future breeding program.
Strategy of biometric evaluation of vegetative yield attributes of Amaranth cultivars
Amaranthus sp (L.) collectively known as amaranth, is a cosmopolitan genus of herbs. Amaranth is nutritionally rich non cereal crop capable of preventing malnutrition and identified as an alternative crop. Despite the increasing of economical importance of amaranth, limited information is available on genetic variability for the agronomic traits among cultivars. The aims of this work were to estimate yield components of each genotype viz. the variance components, phenotypic and genotypic coefficients, heritability and genetic advance (ga). The present studies was conducted at the University of Burdwan, Crop Research Farm during the month of August 2012 and were evaluated eight genotypes of Amaranthus sp .The study indicated existence of considerable amount of genetic variability for all the traits except leaf length in 60 days. PCV is highest in the character leaf plant/ plant in 60 days and lowest in the character branch number/ plant in 90 days.The results stated that leaf / plant in 60 days and branch number / plant in 90 days could be useful character for the improvement of amaranth breeding programme.
BIOMETRIC EVALUATION OF GENOTYPIC VARIABILITY AND GENETIC ADVANCE IN AMARANTH CULTIVARS
Though Amaranth is commonly known as leafy vegetable but it has gained as medicinal grain crop due to capability of preventing malnutrition and presence of various medicinal property . it is needed to evaluate yield components reproductive traits) of each genotype. Considering these views, seven metrical characters(reproductive traits) were studied in Amaranth cultivars. Genetic variability, heritability and genetic advance (GA) for seven metrical traits were studied in the cultivars of Amaranth. The study indicated existence of considerable amount of genetic variability for all the characters studied except rachis / inflorescence. High estimate of heritability were also observed in the characters of Seed yield / plant, length of inflorescence. The highest values of PCV, GCV, heritability and GA shows the character seed weight of 1000 seeds, Seed yield / plant , and inflorescence / plant. Hence, these traits can be effectively improved through selection.
International Journal of Environment and Climate Change
Vegetable amaranth is one of the popular leafy vegetable that occupies a prominent place in India owing to its high nutritive value and fast growing ability. The presence of considerable genetic variability in the amaranth along with very high phenotypic plasticity demands the development of stable genotypes to secure sustainable production. The present research was carried out to quantify the effect of genotype x environment interaction on the performance of 30 identified promising genotypes of vegetable amaranth. The experiment was laid out in the Randomized Complete Block Design with three replications at three locations viz., Arabhavi, Dharwad and Bagalkot during kharif 2018-19. Stability analysis was done as per the linear regression model described by Eberhart and Russell [1] that measures the genotypic response to changing environments. Variance due to environment + (genotype x environment) was significant for four of the studied traits viz., fresh green yield per hectare, fr...