Keywords : Affected


Genotypic and phenotypic Variances and Correlations and Path Coefficient Analysis in Sorghum as Affected by Planting Location

A. A. M. Al-Jbouri

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2009, Volume 7, Issue 1, Pages 166-177

تمت زراعة بذور خمسة عشرة ترکیبا وراثیاً من الذرة البیضاء فی اربعة مواقع هی بغداد والدیوانیة والبصرة وکرکوک فی عام 2005 بأستخدام تصمیم RCBD وبثلاث مکررات بهدف تحدید الصفات الاکثر تأثیراً فی الحاصل والتی یمکن اعتبارها ادلة انتخابیة لتحسین حاصل الذرة البیضاء، قدرت التباینات الوراثیة والمظهریة والبیئیة ومعاملات الارتباط الوراثیة والمظهریة ونسبة التوریث بالمفهوم الواسع، واستخدم تحلیل معامل المسار لتجزئة معامل الارتباط الوراثی الى تأثیرات مباشرة وغیر مباشرة للصفات المدروسة.اظهرت النتائج بأن قیم التباینات ونسبة التوریث اختلفت بین الصفات باختلاف موقع الزراعة. کما اظهر حاصل حبوب النبات ارتباطاً وراثیاً ومظهریا موجباً عالی المعنویة مع عدد حبوب الرأس (0.938، 0.927) فی موقع بغداد و (0.959، 0.928) فی موقع الدیوانیة (0.666، 0.662) فی موقع البصرة و (0.921، 0.903) فی موقع کرکوک.اظهرت نتائج تحلیل معامل المسار ان لعدد حبوب الرأس تأثیراً مباشراً وراثیاً عالیاً فی حاصل حبوب النبات (1.24) موقع بغداد و (1.40) موقع الدیوانیة و (0.77) موقع البصرة و (0.75) موقع کرکوک وتأثیرات غیر مباشرة فی الصفات الاخر. علیه یمکن استخدام هذه الصفة کدلیل انتخابی فی برامج التربیة للانتخاب وتحسین حاصل حبوب الذرة البیضاء فی جمیع المناطق التی زرعت بها فی العراق.

Path Coefficient Analysis of Bread Wheat as Affected by Planting Dates

A. M. H. Al-Jumeily

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2007, Volume 5, Issue 2, Pages 110-123

A field trial was conducted in the field of Crop Science Dept., Coll. of Agric. Univ. of Baghdad during 1997-1998 and 1998-1999 winter seasons, to study the effect of sowing dates on yield and yield components of eight bread wheat cultivars. A split plot arrangement in randomized complete block design with three replicates was used. Planting dates (Oct. 25th , Nov. 19th and Dec. 14th) were assigned in the main plots, where as eight bread wheat cultivars were assigned in the sub-plots. Data collected on grains yield, tillers number/m2, ear length, number of grains / spike, 1000-grain weight and harvest index. Phenotypic correlation coefficient among grain yield and all other characters were determined, path coefficient analysis carried out to partition the phenotypic correlation coefficient to the direct and indirect effects to each planting date and season.
The path coefficient analysis showed that number of tillers/m2 had the highest positive direct effect on grains yield (7.69) followed by ear length (3.92) at the second planting date (Nov. 19th). Number of spikes/m2 gave highest positive direct effect (3.18) followed by 1000 – grain weight (1.5) and ear length on grains yield (1.4) at the first planting date (Oct. 25th) where as harvest index had the highest positive direct effect on grain yield (1.91) at the third planting date (Dec. 14th).
The sum of direct and indirect effect on grain yield was from ears number/m2, harvest index, ear length and tillers number/m2 at the Oct. 25th, and from harvest index, number of grains/spike, ear length and number of tillers/m2 at the Nov. 19th, and from harvest index, tillers number/m2 and number of spikes/m2 at the Dec. 14th at first season. It was concluded that the direct and indirect effects of each character on yield depends on planting date and season, depending on number of tillers/m2, number of spikes/ m2 and harvest index could be used as selection index to improve grains yield in bread wheat by selection in next generations at irrigated central of Iraq.

Changes in some soil physical properties and plant growth as affected by again rotating the paper residue in soil

Wathib S.S. Alnuaymy

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2007, Volume 5, Issue 2, Pages 20-30

A field experiment in Haditha city (240 km west Baghdad) achieved, the objective of this research to test application levels from the residue paper when again rotating the residue paper in soil in some soil physical properties and its effect in growth and yield of Okra.. The residue paper applies to soil with 0%, 0.75%, 1.5% and 3% from weight dry soil. The treatment distributed on the experimental unites by randomized complete block design in three replicated. Mean weight diameter bulk density, resistance of soil penetration, water infiltration, seed emergence, and the space afforded for the okra plant, and the yield for green pods ware measured, the important results can be summarized as follows:
1- The residue paper increase in mean weight diameter that is increased with all application levels compared with control and on, and increasing a large size aggregate can be stability in water. Also resistance of soil penetration decreased with all levels. On the other hand .All treatments study increased accumulative infiltration as compared with control.
3- There was an increasing in seed emergence as compared with control and All treatments study increased the radius cover by vegetative for the okra plant. Whereas significant increasing the yield for green pods by 75.8%, 45.6% and 57.5% for levels 0.75%, 1.5% and 3% from the residue paper respectively.

GENETIC PARAMETERS OF RAPESEED AS AFFECTED BY PLANTING DATE

A. M. H. Al-Jumeily

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2007, Volume 5, Issue 1, Pages 40-54

GENETIC PARAMETERS OF RAPESEED AS AFFECTED BY PLANTING DATE

N. O. Sarkees* , A. M. Al-Jumaily** , A. A. A. Ali* and R. H. Baker*
* Crop Sci. Dep. - College of Agriculture / Univ. of Baghdad
** Crop Sci. Dep. - College of Agriculture / Univ. of Al-Anbar

Abstract
A field trial was carried out at the experimental farm of the agricultural college, Abu-Ghraib during the growing season of 2003/2004 and 2004/2005 to investigate the effect of sowing dates on yield and yield components of eight rapeseed varieties. A split plot arrangement in randomized complete block design with three replicates was used. Planting dates were assigned at the main plots, where as the varieties were assigned in the sub plots.
The results shoed that phenotypic and genotypic variances and coefficients of variability were varied for all characters studied with difference of planting dates. The values of phenotypic variances and coefficients of variability were larger than the genotypic for all characters in both seasons. Broad sense heritability percentage was higher in the November 27th planting for 1000 seed weight for the first season. While plant height and number of seeds per pot showed higher value in September 28th planting, also number of pods per plant had higher value in the October 18th and November 27th planting of the second season .Higher values of co heritability coefficient was obtained between harvest index and number of branches per plant in the October 18th planting (3.13) of the first season, while higher co heritability coefficient between seed yield and number of pods per plant (10.88) was found in the September 28th planting in the second season. The result showed that most of the values of genotypic correlations were larger than the phenotypic for both seasons. In the first season positive highly significant phenotypic and genotypic correlations were found between seed yield and 1000 seed weight in the October 18th planting (0.785,0.816), November 7th planting (0.799,0.806), and November 27th planting (0.789,0.800) and with harvest index (0.647,0.806) in the October 18th planting. While in the second season positive highly significant phenotypic and genotypic correlations were found between seed yield and plant height in the October 18th planting (0.643 and 0.763), November 7th planting (0.550 and 0.635) and November 27th planting (0.820 and 0.876) and with number of branches per plant (0.599 and 0.835) in the November 27th planting, and with number of pods per plant in the October 18th planting (0.799 and 0.882) and November 27th planting (0.569 and 0.595), and number of seeds per pod (0.667 and 0.708) in the September 28th planting, and with the 1000 seed weight in the November 7th planting (0.694 and 0.789) and November 27th planting (0.590 and 0.638). A positive highly significant genotypic correlation was found between seed yield and harvest index (0.528) and positive significant phenotypic correlation (0.444) in the September 28th planting .Therefore , these traits could be used as criteria to improve seed yield of rapeseed as affected by different planting dates.