Genotype by environment interaction for seed yield per plant in rapeseed using AMMI model

Abstract

-The objective of this study was to assess genotype by environment interaction for seed yield per plant in rapeseed cultivars grown in Northern Serbia by the AMMI (additive main effects and multiplicative interaction) model. The study comprised 19 rapeseed genotypes, analyzed in seven years through field trials arranged in a randomized complete block design, with three replicates. Seed yield per plant of the tested cultivars varied from 1.82 to 19.47 g throughout the seven seasons, with an average of 7.41 g. In the variance analysis, 72.49% of the total yield variation was explained by environment, 7.71% by differences between genotypes, and 19.09% by genotype by environment interaction. On the biplot, cultivars with high yield genetic potential had positive correlation with the seasons with optimal growing conditions, while the cultivars with lower yield potential were correlated to the years with unfavorable conditions. Seed yield per plant is highly influenced by environmental factors, which indicates the adaptability of specific genotypes to specific seasons.

Testing of site-specific yield in different harvest passes

“…A certain optimal level of moisture content for seeds and stalks was available to decreasing seed loss and damage during harvesting with combine harvester [11]. It was shown that moisture content of seeds at 11 to 15 % was reasonable [5]. Our results indicated that moisture content of seeds was about 13 %, however the Mann-Whitney test was done with the moist grain yield.…”

“…The basic components of the yield of rapeseed are: the number of plants per unit area (m 2 ), number of pods by plant, number of seeds per pods and weight of 1000 seeds [1÷3]. Seed yield and oil content in the seed, except for certain genetic yield potential of hybrids or varieties, significantly affect the soil-climatic conditions of cultivation, cultural practices, as well as their mutual interaction [4,5]. The weather conditions during the growing season have a large impact on yield, however, any deviation from the optimal conditions for the growth and development of rapeseed can contribute to reduction in seed yield and oil [6].…”

Rapeseed population arrangement defined by adaptability and stability parameters

“…Summary of the analysis of variance for grain yield as a function of plant arrangement in different cultivation years for two rapeseed hybrids Table 2. Mean grain yield as a function of plant arrangements in the cultivation years of two rapeseed hybrids Means followed by the same lowercase letters in the column and uppercase letters in the row do not differ at 0.05 probability level, according to the model of Scott-Knott; S -Superior to the mean + 1 standard deviation; and I -Inferior to the mean + 1 standard deviation is explained by the environment, 8% by difference between genotypes and 19% by the interaction genotype x environment (Marjanović-Jeromela et al, 2011).…”

“…Marjanović-Jeromela et al (2011) attributed yield variations in winter rapeseed along the cultivation years to the irregular availability of rainfall during the crop cycle, especially in the grain filling stage. In addition, Bandeira et al (2013) pointed out that an inadequate plant arrangement in this species also tends to promote variations in grain yield, especially because it is a species with indeterminate growth habit (Koenig et al, 2011).…”

Seed germination and seedling growth of oilrape under saline stress conditions

“…For successful production of both the seed and vegetative mass, climatic conditions are as important as the soil. Climatic changes have great impact on agricultural production, especially on the crop and the yield growth (Marjanović-Jeromela et al, 2011). It is estimated that drought decreases the yield by 17 %, salinity by 20 %, high temperatures by 40 %, low temperatures by 15 %, and the remaining factors by 8 % (Ashraf et al, 2008).…”