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Register a new userHeritability, genetic advance, phenotypic correlation and path coefficient analysis for some quantitative traits in two hybrids of maize (Zea mays L.)
درجة التوريث و التقدم الوراثي و معاملي الارتباط المظهري و المرور لبعض الصفات الكمية في هجينين من الذرة الصفراء (Zea mays L)
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Damascus University ورقة بحثية
Publication date
2013
fields
Field Crops
and research's language is
العربية
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نفّذ البحث في موعدين زراعيين وفق تصميم القطّاعات العشوائية الكاملة بثلاثة مكررات في حقـول قسم بحوث الذرة التابع للهيئة العامة للبحوث العلمية الزراعية في دمشق، سـورية، خـلال الموسـمين الزراعيين 2011 و 2012 ، إذ درس معاملي التباين المظهري و الوراثي إضافةً إلى درجة التوريث و التقدم الوراثي و معاملي الارتباط المظهري و المرور لصفة غلّة النبات الفردي و مكوناتها، و صفتي ارتفاع النبات و العرنــوس فــي هجينــين فــرديين مــن الــذرة الــصفراء (06-565.IL × 06-292.IL ، 06-362.IL × 06-459.IL) .
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 cropping 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).
References used
Allard, R. W. 1960. Principles of plant breeding. New York, John Wiley, PP. 485
Azizi, F., A. M. Rezai and G. Saeidi. 2006. Generation mean analysis to estimate genetic parameters for different traits in two crosses of corn inbred lines at three planting densities. J. Agric. Sci. Technol., 8: 153-169
Bello, O. B., S. Y. Abdulmaliq, M. S. Afolabi, and S. A. Ige. 2010. Correlation and path coefficient analysis of yield and agronomic characters among open pollinated maize varieties and their F1 hybrids in a diallel cross. Afr. J. Biotechnology., 9(18): 2633-2639
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The research was conducted at the Maize Researches Department, General
Commission for Scientific Agriculture Researches (G.C.S.A.R.) Damascus,
Syria during the summer growing seasons of 2010, 2011 and 2012. Treatments
were arranged in a Randomized
Complete Blocks Design with three
replications. The research aimed to evaluate genetic parameters for some traits
like days to 50% silking, plant and ear height, ear length, ear diameter, number
of rows per ear, number of kernels per row, 100 kernel weight and grain yield
per plant using generations means analysis of two maize hybrids (IL.292-06 ×
IL.565-06, IL.459-06 × IL.362-06) to detect epistasis and estimates of mean
effect [m], additive [d], dominance [h], additive × additive [i], additive ×
dominance [j] and dominance × dominance [l] parameters. Results showed that
the additive - dominance model was adequate to demonstrate the genetic
variation and its importance in the inheritance of most studied traits. Nonallelic
gene interaction was operating in the control of genetic variation in most
studied traits. The signs of [h] and [l] were opposite in most studied traits for
the two crosses. Also, the inheritance of all studied traits was controlled by
additive and non-additive genetic effects, but dominance gene effects play the
major role in controlling the genetic variation of the most studied traits,
suggesting that the improvement of those characters need intensive selection
through later generations. The phenotypic variations were greater than
genotypic variations for all studied traits in the two crosses, indicating greater
influence of environment in the expression of these traits. Highly significant
heterosis relative to mid and better parents, respectively was found for all
characters, and this accompanied with inbreeding depression for all traits.
Narrow sense heritability and genetic advance were low in most of the traits
due to the dominance of non-additive gene action in controlling the genetic
variation of the most studied traits and this predict low to medium values of
genetic advance through selection process.
The experiment was grown in a Randomized Complete Blocks
Design with three replications, to estimate the heterosis, degree of
dominance and the inbreeding depression of three hybrids of maize.
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.
نفذت الدراسة في حقول قسم بحوث الذرة التابع للهيئة العامة للبحوث العلمية الزراعية في دمشق , سورية خلال الموسمين الزراعيين 2011 و2012 , حيث تم خلال الموسم الزراعي 2011 تكوين حبوب العشائر الست لأربعة هجن فردية من الذرة الصفراء وتم خلال موسم 2012 تقييم ا
لعشائر الست للهجن الأربعة في موعديين زراعيين 12-5 كموعد مبكر و12-6 كموعد متأخر .
This research was conducted at the Maize Research Department (Kharaboo) of
General Commission of Science Agriculture Research (GCSAR), Damascus, Syria,
during the growing seasons of 2009, 2010 ad, 2011 to study the genetic behavior of days
to 50%
silking, plant height, ear length, 100 grains weight and yield per plant by using
generation mean analysis (GMA) of two individual hybrids of maize, to estimate the
heritability, Phenotypic (PCV), and genotypic (GCV) coefficient variations and the
genetic advance.
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