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Register a new userCorrelation and regression relations between the height of plant and ear with some yield characters in maize
تقدير علاقات الارتباط و الانحدار بين كل من ارتفاعي النبات و العرنوس و بعض الصفات الإنتاجية في الذرة الصفراء
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نفّذت الدراسة في مزرعة كلية الزراعة - منطقة خرابو، جامعة دمـشق خـلال الموسـم 2011- 2012 ، زرعت بذور 32 عائلة محسنة من الذرة الصفراء بطريقة الانتخاب نصف الأخوي إضـافة إلـى الصنفين المحليين المعتمدين غوطة1 و غوطة 82 وفق تصميم القطاعات الكاملـة العـشوائية RCBD و بمكررين، و بعد الحصاد درست علاقات الارتباط و الانحدار بين الصفات المختلفة. أظهرت النتائج وجـود علاقة ارتباط موجبة بين ارتفاع نبات الذرة و ارتفاع العرنوس و بعض الـصفات الكميـة (عـدد الحبـوب بالصف، عدد الصفوف بالعرنوس، وزن الحبوب في العرنوس، و وزن المائة حبة)، كما أشـارت نتـائج علاقات الانحدار إلى أن برامج التربية التي تؤدي إلى زيادة كل من ارتفاع النبات و ارتفاع العرنوس تؤدي إلى زيادة عدد الصفوف بالعرنوس، و وزن الحبوب في العرنوس، و وزن المائة حبة. و خلصت النتائج إلى إمكانية استخدام صفتي ارتفاع النبات و ارتفاع العرنوس دليلي انتخاب مباشر لعدد الـصفوف بـالعرنوس و وزن الحبوب بالعرنوس و وزن المائة حبة.
This study was conducted at the farm of the Faculty of Agriculture in Kharabo during 2011 2012 growing season. RCB design with two replicates was used and the correlation and regression relationship among characters were tested. Results showed that plant and ear heights were both positively correlated with some quantitative characters (number of kernels per row، number of rows per ear, 100 kernel Wight, and kernels weight per ear). Regression results also showed that the increase in plant and ear height was associated with an increase in number of rows per ear, kernels weight per ear and 100 kernel wight. It was concluded that plant height and/or ear height can be used as a direct selection index for number of rows per ear, kernels weight per ear and 100 kernel wight.
References used
AbdAziz ,S., B. L . Stewart., S. J. Birell., T. C. Kasper and D. S .Shrestha. 2004. Ultrasonic sensing for corn plant canopy characterization. ASEA Annual International Meeting. ARS-Agricultural Research Service. USDA United Department of Agriculture. 04-041120. U.S.A
Andrade, C. A. J. and M. B. J. Filho. 2008. Quantitative variation in the tropical maize population, Genetics and plant Breeding, Sci. Agric, Brazil.65(2):400-409
Babaleye, T. and A. Menkir. 2006. A global platform for agro biodiversity research, Genflow, A publication about Agricultural Biodiversity, Biodiversity International. Rome, Italy: 54p
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This study was conducted at the farm of Faculty of Agricultural-Kharabo as
an intensive planting during 2011 and 2012 growth seasons. Using RCB design
with two replications to study some genetic indices and simple linear
correlation between yield
and quality traits of 79 families selected from Sh
population, improved by Full-sib selection. Results revealed that traits, silking
days, protein percentage and oil percentage were affected by additive gene
action while plant height and starch percentage were affected by non-additive
gene action. Results also revealed that grain yield showed positive significant
correlation with starch percentage (r=0.94*) and negative significant
correlation with plant height (r=-0.95*) and protein percentage (r=-0.52*)
indicating that less selection cycles are needed to improve families with high
yield and starch percentage contents with early silking days (intensive planting)
and medium plant height (machining cropper).
Objective of this work was to investigate how plant density and nitrogen
rate affects the growth , yield and its components in maize (Bassel 2 hybrid).
The experiment was carried out, at the agricultural research centre in Snoubar
Jableh, during t
he 2008 and 2009 seasons, included 12 treatments which were
the combination three plant population densities 71428/ha, 57142/ha, and
47619/ha and four N rates (0, 60, 120 and 180 kg/ha). The experimental design
was a split-plot, with different densities as main plots, randomized in three
complete blocks, and the fertilization as subplots. The data were analyzed by
using “Mstat” statistical package. Increasing planting population density
delayed anthesis and silking date, increased the anthesis-silking interval, plant
height, ear height, grain yield, agronomic nitrogen efficiency and nitrogen use
efficiency, but decreased ear leaf area, chlorophyll content, 1000 seed weight,
number of grains/ear, shelling percentage (%), and grain protein content.
Nitrogen fertilizer decreased tassilling and silking date, and nitrogen use
efficiency, increasing plant and ear height, ear leaf area, chlorophyll content,
number of grains/ear, ear weight,1000-grains weight, Shelling percentage,
grain yield up to 120 kg N/ha, agronomic nitrogen efficiency and grain protein
content.
The study was carried out at Abo Jarash farm, Faculty of Agriculture,
Damascus University, during the growing season of 2012, where the maize
cultivar "Gouta 1" was grown in three agricultural spacings (20, 30 and 40 cm
between plants in the same
row), with a fixed space (70 cm) between rows,
according to the randomized complete block design and three replicates per
treatment, in order to study the effect of the studied agricultural spacing on the
following characters: plant height, length and weight of ear, number of kernel
rows per ear, number and weight of kernels per ear, net percentage, hundred
kernels weight, the kernel yield, the dry yield and the oil and protein contents
in the kernels. Results showed a significant decrease in plant height from
155.31 to 130.10 cm, while a significant increase was observed in number of
kernels per ear (from 310.05 to 373.82 kernels), in weight of kernels per ear
(from 41.20 to 65.17 g) and in net percentage (from 61.61 to 91.51 %),
respectively with the increase of agricultural spacing from 20 to 40 cm.
However, the increase in these characters didn’t substitute the small number of
plants in the vast spacing compared with the narrow spacing, which is reflected
in kernel yield per unit of area that amounted to 3.19 and 2.04 tons/ha,
respectively.
The experiment was carried out at two planting dates in a Randomized
Complete Blocks Design with three replications at Maize Research Department,
General Commission for Scientific Agriculture Researches (G.C.S.A.R.)
Damascus, Syria, during two cro
pping season 2011 and 2012 to study the
phenotypic and genotypic coefficients of variation, heritability, genetic advance,
phenotypic correlation and path coefficient analysis for grain yield per plant,
its components and the height of plant and ear of two maize hybrids (IL.292-06
× IL.565-06, IL.459-06 × IL.362-06).
This research was carried out during the agricultural season 2014 in the
Buqai'a plain in west of Homs governorate, to study the effect of several
systems for intercropping on Corn crop (Zea mays L.( and Soybean crop
(Glycine max L.): (Zea mays li
ne : Soybean line) (Zea mays line : Two
Soybean lines) (Two Zea mays lines + Soybean line) ( Two Zea mays
lines + Two soybean lines) (Single Zea mays crop), (Single soybean
crop).
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