Afield experiment was conducted during two season , spring and fall 2013 in the Field of Crop Science Dept. – College of Agriculture – University of Baghdad . The objective of this experiment are to estimate the genetic parameters , broad sense heritability and co-heritability for several traits of maize ( Zea mays L.) for the synthetic cultivar , Ibaa 5012 , under watered and water stress treatments ( 5 and 10 days intervals) by using randomized complete block design with four replications . Genotypic , phenotypic and environmental variation ( , , ) genotypic and phenotypic coefficient of variation ( GCV , PCV) and broad sense heritability were estimated for ten traits : traits : days to anthesis , days to silking , plant height , ear height , number of leaves , leaf area , days to physiological maturity , dry weight , crop growth rate and grains yield . The results showed that genetic variance for most traits more than environment . GCV values for all traits very closed from PCV , that means the traits were under genetic control .All values of broad sense heritability for both seasons and irrigation treatment are high . The highest value was for the dry weight , crop growth rate, grain yield and number of leaves in two season under irrigated , while in water stress , in addition to these traits the days to physiological maturity . It can conclude that the change in the plant environment due to water stress caused a change in the genetic parameters of the studied traits , especially the change in the amount of genetic variance and the environmental variance , it increased the values of some parameters of the traits and reduced to some others . This led to a change in the values of heritability and co-heritability.
|
- Abed, N.Y.; Hadi, B.H.; Hassan, W. A., and Wuhaib, K.M. ( 2017) Assessment yield and its components of Italian maize inbred lines by full diallel cross.15(special No. of 5th Scientific Conference of the Faculty of Agriculture. University of Anbar (part1): 114-124.
- Abirami, S. ; Vanniarajan, C. and Armugachamy S.( 2005) Genetic variability studies in maize (Zea mays L.) germplasm.Plant Archieves.5(1):105-108.
- Alan, O.; Kinaci, G.; Kinaci, E.; Kutlu I.; Baciftci, Z.B.; Sonmez K., and Evrenosoglu Y. ( 2013) Genetic variability and association analysis of some quantitative characters in sweet corn. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 41(2): 404- 413.
- Baktash, F.Y. and Wuhaib, K.M.( 2003) Genotypic and phenotypic variances and correlations in several maize characters .The Iraqi Journal of Agriculture Sciences .34(2): 91-100.
- Blum, A( 1988) Plant Breeding for Stress Environment. Boca Raton, Florida, CRC Press.
- Bolanos, J., & Edmeades, G. O. (1996). The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize. Field Crops Research, 48(1), 65-80.
- Edmeades,G.O.; Benziger ,M.;Chapman, S.C.; Ribaut J. M. and Bolaños, J.( 1995) Recent Advance in Breeding for drought tolerance in maize. Paper presented at the west and central Africa regional maize and cassava workshop, May 22- June 2, Cotonou, Benin Republic.
- Grant, R. F., Jackson, B. S.; Kiniry, J. R. and Arkin, G.F (1989) water deficit timing effects on yield components in maize. Agronomy journal, 81(1):61-65.
- Hadi, B.H. and Wuhaib, K.M.( 2015) Estimation of genetic parameters of growth and yield characters of yellow maize (Zea mays L.) under two levels of nitrogen and plant density. Egyptian Journal of Basic and Applied Sciences, 30(2):108-129.
- Hall, A. J.; Chimenti ,N.; Trapani, F., and Hunau, R. (1984) Yield in water stressed maize genotypes: association with traits measured in seedling and in flowering plants. Field Crops Research, 9: 41-46.
- Hall, A.J. ; lemcroft, J. H. and Trapani N. (1981) Water stress before and during flowering in maize and its effects on yield, its components and their determinants. Maydica 26: 19-38.
- Hassan, W.A., Wuhaib, K.M., and Hadi ,B.H.( 2017) Heritability and genetic gain to a selective of maize under sufficient and insufficient water, nitrogen and potassium. Al-Anbar Journal of Agriculture Sciences . 15(special No. of 5th Scientific conference): 156-165.
- Kirigwi, F.M. ;Van Ginkel M.; Trethowan R.; Seaes R.G.; Rajaram S., and Paulsen, G. M.( 2004) Evaluation of selection strategies for wheat adaptation across water regimes. Euphytica, 135: 361-371.
- Langade, D.M.; Shahi, J.P.; Srivasava, K. Singh, Agarwl, A. V.K. and Sharma, A.(2013) Appraisl of genetic variability and seasonal international for yield and quality traits in maize (Zea mays L.) . Plant Gene and Trait, 4(18):95-103.
- Magorokosho, C.; Pixley, K.V. and Tongoona ,P.( 2003) Selection for drought tolerance in two tropical maize populations. African Crop Science Journal,11(3): 151-161.
- Mahmood, Z.; Malik, S. R.; Akthar, R. and Rafique, T.(2004) Heritability and genetic advance estimates from maize genotypes in ShishiLusht a valley of krakurm. International Journal of Agriculture and Biology. 2(2): 253-257.
- Mehan, D.K.,and Sainy S.S.(1962) Coheritability variation in rice . Indian Journal of Genetic and Plant Breeding. 42(2): 296-301.
- Reddy, V. R. and Jabeen, F.(2016) Narrow sense heritability, correlation and path analysis in maize (Zea mays L.). Sabrao Journal of Breeding and Genetics, 48(2):120-126.
- Rosielle, A. A. and Hamblin, J. (1981) Theoretical aspects of selection for yield in stress and non-stress environments. Crop science 21: 943-946.
- Shobha,R.T.and Sumalini, K.(2013) Coheritability in wilt tolerant maize hybrids. Journal of progressive Agriculture .4(2):106-109.
- Singh, R.K. and Chaudhary B.D.(1985) Biometrical Methods In Quantitative Genetic Analysis. Kalyani publishers, New Delhi-Ludhiona . Pp. 318.
- Wuhaib, K .M.( 2012) Testing of introduced germplasm of maize by line× tester mating system: II- phenotypic traits. The Iraqi Journal of Agriculture Sciences 43(2): 45-55.
- Wuhaib, K .M.( 2012) Testing of introduced germplasm of maize by line× tester method I- Yield and yield components. The Iraqi Journal of Agriculture Sciences.43(1): 38-48.
|
