Mohammad Moradi

Bio: Mohammad Moradi is an academic researcher. The author has contributed to research in topics: Diallel cross & Breeding program. The author has an hindex of 2, co-authored 2 publications receiving 6 citations.

Combining ability for grain yield and some important agronomic traits in Maize (Zea mays L.)

Abstract: The 15 hybrids along with the parents evaluated in field under normal condition to determine the combining ability for grain yield and other agronomic traits in maize (Zea mays L.) at two years 2011 and 2012, using RCBD with three replications. Results of combined ANOVA revealed that year effect was significant for all the parameters. Based on diallel cross analysis according to Griffing method 2, the general combining ability (GCA) and Significant specific combining ability (SCA) were significant for all the traits and so in the inheritance of all the parameters, additive and non additive gene action are important. The GCA×year interaction effects were significant for plant height, ASI and grain yield. The SCA×year interaction effects were significant for days taken to tasseling, ASI and grain yield. This indicates high variability among the parents and crosses in their responses to different conditions changes in both years. The GCA/SCA variance ratio exhibited that all traits were predominantly under non-additive control and non-additive effects played a more important role than additive effects in all the parameters. Based on GCA effects (gi), σ 2 gi , σ 2 si and per se performance for each parent, SD\17 line for 100 grain weight, ASI and grain yield, SD\15 line for number of rows per ear, SD\10 line for number of kernels per row was suitable resources to increase grain yield. Therefore these inbred line probably have potential as parents of hybrid varieties, as well as for inclusion in breeding programmes, since they may contribute superior alleles in new populations for high grain yield. Furthermore, SD\3×SD\704 and SD\17×SD\704 proved to be the best crosses to increase grain yield.

Genetic analysis for grain yield and yield contributing characters in maize (Zea mays L.).

Abstract: The F1 hybrids along with the parents were evaluated in field to Genetic analysis for yield and yield contributing characters in maize (Zea mays L.) at Dezful Research Station in Safi Abad, in 2011 using RCBD with three replications. Results analysis of variance showed that variations among genotypes were highly significant for all the traits studied. Based on diallel cross analysis according to Griffing method 2, the results indicated significant differences among the parents for general combining ability (GCA) and crosses for specific combining ability (SCA) for all the characters studied and so in the inheritance of all the parameters, additive and non additive gene action are important. Based on GCA effects and per se performance for each parent, SD\3 and SD\17 line was suitable resources to increase grain yield. Therefore these inbred line probably have potential as parents of hybrid varieties, as well as for inclusion in breeding programmes, since they may contribute superior alleles in new populations for high grain yield. Furthermore, SD\3×SD\17 proved to be the best cross to increase grain yield. These best parents and cross combinations could be effectively utilized in maize breeding for the improvement of yield components and thus their incorporation in further breeding program is suggested.

Genetic analysis, combining ability and yield stability of maize genotypes under maize streak virus prone environments.

Abstract: The objective of this study was to determine and rank farmers ‘preferred traits of maize and their perceived constraints which limit maize production in the northern areas of Tanzania. The study was conducted in 2012, at 12 villages selected from Babati, Arumeru and Hai Districts. Participatory rural appraisal (PRA) and survey methods were used to collect data from 500 farmers sampled across the study areas. Of these, 180 farmers were interviewed and 320 participated in the focused group discussions (FGD). Data collected were summarized and analyzed using various analytical tools such as matrix and pair-wise ranking and SPSS program. The most preferred traits according to farmers’ criteria, ranks and matrix mean scores were high yield (71.9%), disease resistance (70.0%), drought tolerance (69.9%), good grain milling quality (65.3%), grain palatability (60.7%), dense grain (59.0%) and early maturity (55.8%). Other important traits were large grain size (50.3%), intercropping suitability (49.7%), large cob size (48.5%) storage pests’ resistance (48.1%) and multiple ears (39.4%). Major biotic constraints limiting maize production in the study area were maize streak virus (MSV) and cob rot diseases while the important abiotic constraints were drought and poor soil fertility. High costs of production inputs and low price of maize were also among the challenges to maize production in the study area. Knowledge of the farmers’ preferences and production constraints is required by breeders to enhance the productivity of maize in the northern areas of Tanzania.

Breeding tef [Eragrostis tef (Zucc.) trotter] for drought tolerance in Northern Ethiopia.

Abstract: Doctor of Philosophy in Plant Breeding. University of KwaZulu-Natal, Pietermaritzburg 2016.

Combining ability analysis of maize inbred lines and genotype x environment interaction of hybrids for grain yield and maize streak virus resistance.

Abstract: ................................................................................................................................. i Declaration ............................................................................................................................ ii Acknowledgements ................................................................................................................ iii Dedication ............................................................................................................................. iv Table of

Estimation of combining ability and superiority percentage of half diallel crosses between yellow maize inbred lines for growth characters and some diseases resistance

Abstract: Half diallel cross among ten yellow maize inbred lines was made at Sakha Agriculture Research Stationduring the growing season 2015. The resultant 45 crosses along with two commercial hybrids as yellowchecks (single crosses 162 and 168) were evaluated at two field experiments in two years 2016 and 2017.The results indicated that, years (Y) mean squares had significant effects for all traits, except resistance todowny mildew disease. Genotypes (G) and crosses (Cr) mean squares had high significant effects for alltraits in the two years and its combined data. However, G x Y and Cr x Y interaction were significant orhighly significant for all traits. Mean squares due to general combining ability (GCA) and specificcombining ability (SCA) were highly significant for all traits in the two years and their combined analysis.On the other side, the interactions between GCA and SCA with years were highly significant for all traits.For GCA / SCA and GCA x Y / SCA x Y mean squares ratio, the data pointed out that, this ratio exceededthe unity for all studied traits in two years and their combined. The inbred line P4 had desirable significantof (g^i) for earliness, good plant type, resistance to downy mildew and late wilt diseases, also the inbred lineP8 had desirable significant of (g^i) for earliness and good plant type. The single crosses; P1 x P3, P6 x P7 andP4 x P5 had negative and significant values of (s^ij) for good plant type and earliness. The single crosses P1 xP2, P1 x P8, P2 x P8, P4 x P8, P5 x P8, P6 x P8, P7 x P8, P8 x P9 and P8 x P10 had superiority percentage indesired direction over both check cultivars i.e., SC 162 and SC 168 for earliness and good plant type.