Genotype x Environment Interactions in Sugarcane under Irrigation for Agronomic Traits at Advanced Screening Stage in Ferké, Northern Ivory Coast

Abstract

Background:The selection procedure of commercial sugarcane varieties introduced in Ivory Coast involves two different stages. Four varieties pre-selected at the first stage regarding a previous trial were due to be tested at the advanced stage. Aims: The study aimed to determine the best performing sugarcane genotypes at the advanced selection stage under sprinkler irrigation, in comparison with to two check varieties (R579, SP70-1006). Methodology: The same field experiment was carried out on two different locations in Ferké 2 sugar estate of Northern Ivory Coast. The experimental design used was a randomized complete block (RCB) with six cane genotypes in four replications. Every plot consisted of five dual rows of ten meters with 0.5 and 1.90 m of inter-row spacing, i.e. 95 m² per plot and about 3000 m² for each experiment. Both experiments were conducted over two seasons (plant cane and first ratoon) as early-season crops from early November, 2017 to mid-December, 2019. Over each micro-plot, data based on different agro-morphological traits were collected at harvest from three central dual rows. JEAI, 42(2): 97-115, 2020; Article no.JEAI.55656 98 Results: The study showed that most relevant traits in genotype clustering were related to juice quality (recoverable sucrose, sucrose content, purity), yields and yield components (Millable stalk number/ha, stalk height, stalk diameter, internode number). Based on sugar yields, two genotypes (N47, ECU01) superior to both check varieties were found promising with, respectively, 13.7 and 13.5 t sugar/ha. Their cane yield performances gave 124 and 123 t/ha, respectively, compared to 126.8 t/ha for the best performing check. Conclusions: Not only sugar yield, but also flowering rate, stem borer infestation rate, stalk diameter, average stalk height and the number of tillers per hectare were found as the most relevant agronomic traits in the genetic variation of sugarcane genotypes tested. It came out also that GxE interactions were highly significant for five different traits, namely, cane and sugar yields, stalk borer infestation rate, fiber content and the average stalk height. Original Research Article

Screening of sugarcane new varieties for agro-technological characters and resistance to Eldana saccharina W in Burkina Faso

“…These findings are in accordance with those of Péné and Déa, (2000) and Péné et al, (2012) in their studies which indicated that varietal selection appears to be an essential component in increasing sugarcane productivity in same way as irrigation. Péné and Béhou (in 2019) in Côte d'Ivoire, with exception of yield. However, we note a difference in yield between varieties evaluated in general.…”

Genetic Variation and Heritability for Juice Quality and Yield Traits in Selection of Sugarcane Genotypes under Irrigation at Early Stage in Ferké 2 Sugar Estate of Northern Ivory Coast

“…Estimates of broad-sense heritability (h²) are categorized according to Robinson [30] cited by different authors [25,31,38,42] as low (<30%), moderate (30≤-<60%) or high (≥60%).…”

“…Heritability represents the relative importance of genetic and environment factors in the expression of phenotypic and genotypic differences among genotypes within a population [3,6,[28][29][30]. Therefore, the knowledge of heritability related to important traits and the correlations among them are key issues to determine the best selection strategy [31][32]38]. Genotypic coefficient of variation (GCV) is another measure of relative genetic variation of a trait within a population [33].…”

“…Genotype versus environment interactions (GxE) are a serious concern in breeding programs as they affect decision making in selection. When the ranking of genotypes changes across environments, it requires their evaluation environment-wise to determine their accurate performance [35,38]. Studies in various sugarcane breeding programs have reported significant G×E interactions for cane and sugar yields [36][37][38].…”

Genetic progress in upland rice breeding program for grain yield and plant height

“…Mixed models have been applied successfully to animal and plant breeding programs. In the latter case, they are used widely for breeding of perennial plants such as selection of cupuassu clones (Maia et al, 2011), papaya progenies (Pinto et al, 2013), sugarcane (Barreto et al, 2019), and evaluation of genotype-environment interactions in sugarcane (Péné;Béhou, 2020), maize (Dias et al, 2018), among several studies found in the literature. This method is adapted for annual crop breeding only recently, one of the reasons being the experimentation type involved.…”