Response of Yield Components of Some Black Rice Cultivars to Spraying With The Amino Acid Phenylalanin

Abstract

Three rice varieties (Goura, Chakhao and Local) were grown during two seasons 2019-2020, aimed to assessment of different levels of spraying of phenylalanine on performance of the grain yield components in different rice varieties. The selected three varieties (sub plots) were grown under the influence of four levels of phenylalanine spraying (main plots), included amino acid treatments occupied the main plates 50, 100 and 150 mg.L-1 as well as the control treatment (spraying distilled water only), the experiment applied in split plots arrangements in RCBD with three replications. The results showed a significant superiority of the Goura genotype selected by giving the highest averages in plant height, total grains number per panicles, 1000 grains weight, grain yield, Biological yield, percentage of harvest index and tillers number plant, that reached to 118.47 cm, 144.25 grains.panicl-1, 23.44 g, 6.70 tons.hectare-1, 12.06 tons.hectare-1,54.82% and 18.40 tillers.plant-1 respectively, while the genotype significantly superior to Local Selected by giving the highest averages in the leaves content of total chlorophyll pigments SPAD, which amounted to 39.13 SPAD. The spraying of the amino acid phenylalanine at a concentration of 50 mg.l-1 was significantly superior by giving the highest averages in the indicators of vegetative growth, yield and its components.

Estimation of Selection Indexes and some Genetic Parameters in the Genotypes of the Rice Crop Oryza sativa L.

“…Genetic, environmental and phenotypic variances for the traits under study. The results shown in Table (7) indicated the values of genetic, environmental and phenotypic variances, the coefficient of phenotypic and genetic variation, the percentage of heritability in the broad sense, and the expected genetic improvement. The genetic, environmental and phenotypic variances were significant for all traits, and the phenotypic variances were higher than the genetic variances.…”

“…The results in Table (5) showed the values of selection Indexes for the genotypes and for seven traits which were the grain yield, the number of branches in panicle and the panicle length , the number of grains in panicle, biological yield, harvest index, and weight of a thousand grains. However, the highest value of the indicator as an selection Indexes was (869.476) for the genotype under order 14, followed by the genotypes in order (17,15,3,19,20,7) with values (721.522) and (647.979), (609.560), (599.907), (549.821) and (542.507) respectively. It was suggested from the above that the best genotypes are (IPA1, Dajla, Mishkhab1, Anber33, Ghadir, Yasmin, KHA4).…”

“…Kanoate et al [6] indicated that the heritability in the broad sense and the expected genetic improvement as a percentage for the two traits of flowering 50% and leaf area were high. Abakah and salman [7] indicated that the values of phenotypic and genetic variation coefficients ranged between low and medium for most of the traits. Akter et al [8] obtained an expected genetic improvement of grain yield amounted to (2.04) and heritability in the broad sense amounted to (93.73).…”