Indexing

Abstract: This study was initiated with the objective of investigating association of genetic parameters with grain yield and grain yield prediction based on genetic parameters used for the study. Four genetic parameters viz., specific combining ability (SCA), mid-parent heterosis (MPH), better parent heterosis (BPH) and Standard heterosis with grain yield (GY) were used for the study. Genetic analysis for SCA effect and estimation of, MPH, BPH and SH were done as a result of significant variation observed among 45 F1 half diallel cross hybrids for grain yield. The estimated genetic parameters association was used for grain yield prediction or regression analysis. Ten elite inbred lines were selected based on over per se performances. The crosses were done in a 10 x 10 half-diallel mating design to produce 45 F₁ single crosses hybrids during 2016. The experiment was conducted at Bako national maize research in 2017 main season by using alpha lattice design. SCA, MPH, BPH and SH were used for multiple linear correlation and regression analysis for grain yield. The specific combining ability, mid parent, better parent and standard heterosis were showed highly significantly (p < 0.01) and positive associated with grain yield at value of r = 0.78, 0.60, 0.65 and 1.00 respectively. Those significantly and positively associated genetic parameters with grain yield had 61%, 36%, 42%, 100% grain yield predictive values for SCA, for MPH, BPH and SH respectively.

Keywords: Heterosis, Diallel, Multiple regressions, Specific combining ability, Grain yield.

Title: Associations of genetic parameters with F1 grain yield of maize (Zea mays L.) and grain yield prediction of diallel crosses

Author: Zelalem Tafa, Abenezer Abebe

ISSN 2350-1049

International Journal of Recent Research in Interdisciplinary Sciences (IJRRIS)

Paper Publication

Abstract: Sorghum [sorghum bicolor (L) Moench] is an important cereal and widely grown for food, feed, fodder and fuel in the semi-arid tropic’s areas of the world. Different works were done in sorghum breeding but production and productivity gap are still there. The existence of tremendous amount of sorghum variability exhibiting native genetic variation made Ethiopia as genetic resource reservoir ranking first in contributing germplasm collection worldwide. The relationship between a plant and a pest is very complex. However, the ability of a pest or pathogen to cause disease in or damage to a plant depends on different factors. Plant varieties within a species can differ in their ability to defend themselves. Its Understandable that the presence and magnitude of genetic variability is a pillar for developing tiptop variety in breeding program. Ethiopian sorghum landraces exhibit native genetic potential for sources of drought, salinity, Al-toxicity tolerance, pest resistance, as sources of nutritional value, high energy, fodder quality, malting and processing quality, NUE and WUE are an opportunity and considerable starting point for exploiting noble gene in the development of sorghum cultivars with resistance to these important stresses. Therefore, reviewing the genetic diversity of Ethiopian Sorghum landraces for sources of biotic and abiotic stress resistance is the main objective of this review paper. It is important to adequately collect, characterize and preserve existing genetic potentials of sorghum landraces from untouched areas of Ethiopia before it is invaded and destroyed this dynamic world.

Keywords: Variability, Tolerance, Resistance, landraces, biotic, abiotic, Al-toxicity, NUE, WUE.

Title: Ethiopian Sorghum [Sorghum bicolor (L.)] Landraces: Sources of Biotic and Abiotic Stress Resistance

Author: Tilahun Mola

ISSN 2350-1049

International Journal of Recent Research in Interdisciplinary Sciences (IJRRIS)

Paper Publication