List of Articles rainfed barley

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  1 - Grain yield stability analysis of rainfed barley varieties and lines using GGE biplot method
  Farhad Ahakpaz Farzad Ahakpaz
  This study was conducted to determine grain yield stability of rainfed promising barley genotypes in six Iranian rainfed research stations (Maragheh, Sararood, Uromieh, Ghamloo, Zanjan and Ardabil) under cold and semi-cold conditions during three cropping seasons (2006- More

  This study was conducted to determine grain yield stability of rainfed promising barley genotypes in six Iranian rainfed research stations (Maragheh, Sararood, Uromieh, Ghamloo, Zanjan and Ardabil) under cold and semi-cold conditions during three cropping seasons (2006-2009). The studied genotypes were 10 promising barley  lines  along  with  two  checks  (one  local  variety  and  newly  released  variety  of  Abidar).  In  each environment, the experiment was arranged in randomized complete block design (RCBD) with four replications. Results of combined ANOVA showed that location, year, genotype, interaction of location and genotype, and interaction of year, location and genotype had significant effect on grain yield. The genotypes showed the highest and the lowest grain yield in Sararood (2549 Kg/ha) and Zanjan (1578 Kg/ha) stations, respectively. Line No.9 produced the highest grain yield (2061 Kg/ha). To study the interaction of genotype and environment, GGE  biplot  method  was  used.  Based  on  the  polygonal  graphs  related  to  genotypes,  genotype  No.1  (G1) produced the highest yield in Ardabil and genotype No.5 (G5) showed the highest yield in Zanjan, Maragheh and Uromieh. Besides, genotype 3 (G3) and genotype 4 (G4) produced the highest yield in Ghamloo and Sararood stations, respectively. Based on the theoretical ideal environments graph, Uromieh was closer to the ideal environment. Regarding to the imaginary ideal genotype graph and biplot of genotypes and environments, genotype No.5 was identified as the best one due to its higher yield and better yield stability Manuscript profile
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  2 - Relationship between growth habit of barley genotypes with grain yield and some agronomic traits under Maragheh cold dryland area
  Farhad Ahakpaz Farzad Ahakpaz Roghieh Dastbari
  In order to evaluate the effect of growth habit on agronomic traits such as days to heading and physiological maturity, grain filling period, plant height, 1000 kernel weight and grain yield, an experiment was conducted as randomize complete block design with three repl More

  In order to evaluate the effect of growth habit on agronomic traits such as days to heading and physiological maturity, grain filling period, plant height, 1000 kernel weight and grain yield, an experiment was conducted as randomize complete block design with three replications with 259 barley genotypes at Maragheh dryland agricultural research station during 2004–2006. Based on the growth habit, genotypes were grouped as winter type (62.16%), facultative type (15.44%) and spring type (22.4%). Comparison of means for grain yield showed that there were high significant differences between winter with facultative and winter with spring types, but it was not significant between facultative and spring types. Spring-type genotypes had the highest grain yield mean with 2893 Kg ha-1. The existence of negative correlation between growth habit and grain yield and 1000 kernel weight showed that spring type genotypes had high yield and 1000 kernel weight. There were also negative correlation between growth habit and days to heading, maturity and plant height indicating that spring type genotypes had high height and late maturity. High positive correlation between grain yield and plant height showed that genotypes with high plant height had higher grain yield under drought condition. Manuscript profile