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Register a new userVariability and phenotypic correlation among yield and some yield components in different genotypes of local radish (Raphanus sativus .L)
دراسة التباين و معامل الارتباط المظهري بين الغلة و بعض مكوناتها في طرز مختلفة من الفجل المحلي Raphanus sativus L
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نفذ البحث في موقع الطيبة / مركز بحوث ريف دمشق العائد للهيئة العامة للبحوث العلمية الزراعيـة خـلال الموسـمين الـزراعيين 2011-2012 و 2012-2013 ، باسـتخدام سـتة طـرز مـن الفجـل (L. sativus Raphanus) جمعت من محافظتي حمص و ريف دمـشق. اتبـع فـي تـصميم التجربـة القطاعات العشوائية الكاملة بثلاثة مكررات للطراز الواحد و ذلك بهدف دراسـة التباينـات بـين الطـرز المزروعة و دراسة العلاقات الارتباطية بين بعض صفات المجموع الخضري و مكونات الغلة. أظهرت نتائج البحث وجود تباينات مظهرية بين الطرز في شكل الجذور (طول الجذر و قطره) و متوسـط وزن الجـذور، كما أوضحت الدراسة وجود علاقة ارتباط إيجابية قوية بين وزن الجـذر و الإنتاجيـة (964.0) ، و كـذلك علاقة ارتباط إيجابية متوسطة بين قطر الجذر و الإنتاجية (382.0) ، و علاقة ارتباط إيجابية ضعيفة بـين وزن الجذر و قطره (274.0) ، كما أن العلاقة إيجابية متوسطة بين طول الجذر و كل من ارتفـاع الحزمـة الورقية (333.0) و عدد الأوراق (329.0) ، بينما كانت العلاقة سلبية بين العوامل الأخرى.
The experiment was conducted at Tayba Research Station, General Commission for Scientific Agricultural Research during 2011-2012, and 2012- 2013 growing seasons. Randomized block design with three replications was used to investigate phenotypic variances and to determine correlation of yield components of six local genotypes of radish. Significant differences between genotypes were appeared in diameter, length and weight of radish root. The correlation analysis revealed that root weight was positively and significantly correlated with both yield (0.964) and root diameter (0.274). Yield was positively and significantly correlated with root diameter (0.382). Root length was positively and significantly correlated with plant height (0.333) and number of leaves (0.329) per plant.
References used
Cools, M.H. 1981. Black radish varieties for the spring. Groenten enfruit, 36(26) :34-35
Danu, N. S. and S. D Lal. 1998. Correlation studies in radish (Raphanus sativus L.). Progressive Horticulture. 30(3/4): 135- 138
Grafius, J.E. 1956. Components of yield in oats: A geometric interpretation. Agron. J. 48: 419-423
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The present investigation was undertaken to estimate phenotypic
correlation and path coefficient analysis for grain yield and its components in
maize. Four local genotypes of yellow maize were evaluated in 2008 and 2009
growing seasons at two loca
tions i.e. Damascus and Dir Al-Zor under three
nitrogen fertilization levels (130, 195 and 260 of N. ha-1), The nitrogen fertilizer
was applied at two splits. Split split plot design was used with 4 replications.
Results of phenotypic correlation values showed that grain yield at Damascus
location was positively and significantly associated with ear height (r= 0.204**),
ear length (r= 0.205**) and number of rows per ear (r= 0.228**). On the other
hand, grain yield at Dir Al-Zor location was positively and significantly
associated with all studied traits at combined data whereas, it was positively
and significantly associated with ear length at three levels and combined data
(0.305*, 0.410**, 0.347** and 0.375**, respectively). The data of path coefficient
analysis showed that ear length, ear height and number of rows per ear had
positive direct effects on grain yield variation and thus grain yield
improvement can be achieved through selection for ear length and ear height at
Damascus location (11.06%). On the other side, data showed that each of ear
height, number of kernels per row and 100-kernel weight had positive direct
effects on grain yield variation (32.98%) and thus, 100-kernel weight can be
considered as selection criteria may lead to the improvement of grain yield in
yellow maize at Dir Al-Zor location.
In a study conducted at Research Center of Dara'a, General Commission
for Scientific Agricultural Research during two growth seasons 2007/2008 and
2008/2009. 11 faba bean (Vicia faba L.) populations were planted in an
experiment designed randomize
d complete blocks design with three
replications. The objectives were investigation of phenotypic variance among
populations studied, to determine the relationship among number of yielded
branches plant -1, number of pods plant -1 , number of seeds pod -1, 10- green
pod weight (g) and yield of green pods plant -1 (g) using correlation and path
coefficient analysis. The combined analysis of variance showed highly
significant differences among populations under study and for all
characteristics studied, except number of yielded branches plant-1 where
differences were only significant. The correlation and path analysis studies
revealed that negative and highly significant relationship was found between
number of yielded branches plant -1 and yield of green pods plant-1, while was
positive and highly significant between yield of green pods plant-1 and 10-green
pod weight. All direct effects of components studied were negative in both
seasons, except 10-green pod weight, and these results suggested adopting the
last component as a selection index during making selection of high yielding
genotypes in faba bean populations. .
This study was carried out at Karahta Station of Field Crop
Research, General Commission of Agricultural Scientific Researches
during 2010-2011 and 2011-2012 cropping seasons in order to determine the
phenotypic correlation coefficient between the traits and the path coefficients
analysis for the most affected traits in grain yield.
A half diallel set of crosses among six highly diverse barley (Hordeum
vulgare L.) genotypes were evaluated at Karahta Research Station, General
Commission of Scientific Agricultural Research (GCSAR), during 2010-2011
and 2011-2012 seasons to stud
y heterosis, potence ratio, correlations among
traits and path coefficient analysis for number of spikes per plant, number of
grains per plant, number of grains per spike, biological yield ,and grain yield
per plant. Heterosis effects for seed yield ranged from%-89.52 (T-6669×S-6303)
to%16.99 (Arabi abiad mohsan×S-6689) and from%-49.94 (L-6711×S-6689)
to %-1. 35 (Arabi abiad mohsan×S-6689) relative to mid and better parents
respectively. Potence ratio values ranged from 1.14 (number of spikes per
plant) to 3.50 (biological weight) indicating that non-additive gene action was
more important in controlling all studied traits. Correlation coefficients among
traits indicated that seed yield was positively and significantly associated with
each of number of spikes per plant (0.289), number of grains per plant (0.832),
number of grains per spike (0.587), and biological yield (0.708) traits. Path
coefficient analysis indicated that number of grains per plant trait had high
positive direct effects on grain yield.
This study was conducted at the farm of Faculty of Agricultural –Kharabo
as an intensive crop during 201 and 2012 growing seasons. Using the
Randomized Complete Block Design (RCBD) with two replications to study
some genetic indices for grain yiel
d and its components, of 79 families of the
Sh group of maize improved by Full-sib selection. The results indicated that
the broad sense heritability ranged from high to moderate for some yield
components (number of kernels per row, number of rows per ear, ear length,
ear diameter, the weight of whole ear, whole kernel weight and grain yield and
it was 49.6, 52.9, 46.3 79.7, 56.74, 51 and 85.2%) respectively. Additive gene
action appeared to be controlling number of kernel per row, number of rows
per ear, ear length, ear diameter،,grain yiel, the weight of whole ea, kernel
weight indicating less selection cycles are required to improve yield depending
on its components.
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