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Register a new userThe phenotypic correlation and path analysis coefficient for grain yield and its components in four local maize (Zea mays L.) genotypes
دراسة الارتباط المظهري و تحليل المسار لصفة الغلة الحبية و مكوناتها في طرز محلية من الذرة الصفراء(.Zea mays L)
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أجري البحث في قسم بحوث الذرة في دمشق، و مركز البحوث العلمية الزراعية في دير الزور ، التابعين للهيئة العامة للبحوث العلمية الزراعية، سورية، خلال الموسمين الزراعيين 2008 و 2009 بهدف دراسة معاملي الارتباط المظهري و تحليل المسار لصفات الغلة الحبية و مكوناتها.
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 locations i.e.
References used
AL-Ahmad, A. S. 2004. Genetic parameters for yield and its components in some new yellow maize crosses. Ph.D. Thesis, Fac. of Agric., Ain Shams Univ., Egypt
Amin, Amal Z, H. A. Khalil and R. K. Hassan. 2003. Correlation studies and relative importance of some plant characters and grain yield in maize single crosses. Arab Univ. J. Agric. Sci. Ain Shams Univ. Cairo 11(1):181 – 190
Asrar-ur-Rehman, S., U. Saleem and G. M. Subhani. 2007. Correlation and path coefficient analysis in maize (Zea mays L.). J. Agric. Res., 45(3): 177- 183
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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.
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.
The study was done at the field research station Sianow of General Commission for
Scientific Agricultural Research at Lattakia, to evaluate the susceptibility of 6 strains of maize
Zea mays. L, and fifteen maize crosses obtained by half Diallel cro
ss, against under conditions
Industrial infection by large corn stem borer , Sesamia cretica Led. The experience was
designed at randomized complete blocks (R.C.B.D).
Strain IL.257-09)P1( expressed general high capacity to the attributes of Number of
kernels per row(3.089), number of holes (-1.261). Strain IL.298-09 (P2) also expressed general
high capacity to the attributes of Ear length (0.717), Intensity of damage (-0.432),% of yield
loss (-6.022). strain IL.286-09 (P3) general high capacity to the attributes of diameter Ear
(0.292), number of rows per ear (2.806). Strains IL.255-09 )P4) )0.036( and IL.228-09)P5)
(0.969) also expressed general high capacity to the attributes of grain yield. Strain IL.262-
09(P6) expressed general high capacity to the attributes of 100- Kernel weight (1.942),
infestation grain yield) 0.784), tunnel length (-5.629), Percentage of dead hearts (-1.132).
This study was conducted at the of field research station Sianow belong to the General Commission for Scientific Agricultural Research at Lattakia, to evaluate the susceptibility of maize hybrids produced by using half Diallel the cross according to
the design ofrandomized completeblocks (R.C.B.D), under industrial infection by large corn stem borer Sesamia cretica. Hybrids were compared with the control (Ghouta- 82). The hybrid (P1 × P2) Showed positive and highly significantheterosis for Ear diameter and tolerance forlarge corn stem borer compared with the average of the parents and the best parents and the check (Ghouta- 82). The hybrid (P2 × P6) showed positive and highly significant heterosis for the number of kernels per row compared with the average of the parents and the best parents and the check (Ghouta- 82). Also the hybrid (P1 × P6) showed positive and highly significant heterosis for the number of kernels per row relative to the average of the parents and the best parents and the check (Ghouta- 82). hybrid (P4 × P6) showed positive and highly significant heterosis for the recipe grain yield compared with the average of the parents and the best parents and the check (Ghouta- 82). The hybrid(P5 × P6) also showed positive and highly significant heterosis for the Percentage of dead hearts of the developing summit compared with the average of the parents and the best parents, and compared with the check (Ghouta- 82), therefore it can be considered as a sensitive hybrid.
The aim of this research is to determine the effect of some heavy metal ions
on total protien metabolism in seeds and seedlings of maize plant (GHOTA 82)
and study the changes in the morphological specifications of plant, after
cultivating for 6 d
ays in solutions at different concentrations of water and
heavy metal ions Ni2+, Cu2+, Zn2+, Cd2+, Hg2+ and Pb2+.
The results showed that heavy metal ions have inhibitory effect on total
protien metabolism, which decreased their amount in seedlings, While
accumulated in the seeds. This inhibitory effect depends on the type and
concentration of heavy metal ions.
The results also showed morphological changes in the maize plant seedlings,
which decreased their growth due to the effect of these ions.
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