Study of genetic diversity of bread wheat genotypes in view point of remotion of assimilates to seed in two normal and drought stress conditions

Subject Areas : Agroecology Journal

Majid Tousi Mojarrad ¹ (M.Sc. Islamic Azad University, Karaj Branch)
Mohammad Reza Ghannadha ² (Scientific Board of Faculity of Agronomy, Tehran University)
Mohammad Salehi ³ (M.Sc. Islamic Azad University, Karaj Branch)

Received: 2007-04-26 Accepted : 2007-07-20 Published : 2007-08-23

Keywords: Bread Wheat, Assimilate, Genetice diversity, Normal and drought stress condition,

Abstract :

Genetice diversity of bread wheat genotypes in view point of assimilate remotion  potential to seed in two normal and drought stress conditions, was evaluated in 2003. two experiment were conducted as RCBD design with four replications and eight genotypes. In one experiment, irrigation was done all growing season based on climate condition and plant need of plant. While, in other experiment irrigation was don only in spiklet stage and filling seed stage suffered drought stree condition. Result showed that there were no significant difference in dry matter transmission from peduncle and second medeian node in all genotypes in two normal and stress conditions. While all genotypes showed significant difference in dry matter transmission from other parts of plant. In normal condition, there was no significant difference in remotion of dry matter from peduncle and second medeian node, but in other parts of plant there was significant difference at 5% confidence level. otherwise in drought stree condition, there was significant difference in remotion of dry matter from peduncle and second medeian node in 5% confidence level. And in other parts of plant, there was no significant difference. Remotion dependent characteristics did not correlate with seed yield. Thus, though this process act as a support source of seed weight, due to their low  contribution to seed weight, it dose not seem that Nariety selection based on mentioned characteristics result in high yield genotypes in semidwarf wheat genotypes

References:

1- جهان بین، ش. 1382. بررسی اثر تنش های خشکی، دما و شوری بر شاخص های فیزیولوژیک و عملکرد ژنوتیپ های جو لخت. رساله دکتری رشته ی زراعت، دانشگاه تربیت مدرس.

2- نادری، ا. 1380. ارزیابی تنوع ژنتیکی و مدل سازی پتانسیل انتقال مجدد آسیمیلات ها و نیتروژن به دانه در ژنوتیپ های گندم در شرایط تنش خشکی. رساله دکتری رشته ی زراعت، واحد علوم و تحقیقات دانشگاه آزاد اسلامی تهران.

3 - Beninati, N. F, and  R. H. Busch. 1992. Grain  protein inheritance and nitrogen ptake and redistribution  in  crosses.  Crop  sci. 32: 1471 –1475.

4- Blacklow, W. M., B. Darbyshire, and P. Pheloung. 1984. Fructans progressed and   depolymerized in the internodes of winter wheat as grain filling progressed. Plant sci. Lett. 36: 213 –218.

5- Blum, A., H. Polarkova, G. Golan, and J. Mayer. 1983. Chemical desiccation  of  wheat  plants  as simulator of post anthesis stress. I. Effects on traslocation and kernel growth. Field crops  res. 6: 51–58.

6- Clarke, J. M., R. A. Richards and A. G. Condon. 1996. Effect of drought stresss on residual  transpiration and it's relationship with water use of wheat. Canadian journal of plant science, 1. 71: (3): 695–702.

7- Clarke, J. M., T. F. Townley, T. N. Smith, Mc C. Aig, and G. Green. 1984.Growth  analysis of  spring wheat cultivars of varing drought resistance. Crop  sci. 24: 573– 970.

8 - Cooper, J. C. B. 1983. Factor analysis. an overview. Am. Statis. 37: 141–147.

9- Cox, M. C., C. O. Qualset, and  D. W. Rains.1986. Genetic varition for nitrogen assimilation  and translocation in wheat. Iii: nitrogen translocation in relation to grain yiled and protein.  Crop  sci. 26: 737–740.

10- Davidson, D. J., and P. M.Chevalier.1992. Storage and remobilization of water soluble  carbohydrates in stems of spring wheat. Crop sci. 32: 186–190.

11- Entz, M. H., and D. B. Flower. 1990. Differential agronomic responses of winter wheat  cultivars to postanthesis environmental stress. Crop sci. 30: 1119 –1123.

12- Flood, R. G., P. G. Martin., and W. K. Gardner. 1995. Dry matter accumulation and  partitioning and its relationships to grain yield in wheat. Aust. J. Exp. Agric. Res. 35: 495–502.

13- Gent, M. P. N. and R. K. Kiyomoto. 1989. Assimilation and distribution of photosynthesis in  winter wheat cultivars differing in harvest index. Crop sci. 29: 105–125.

14- Giunta, F., R. Motzo, and  M. Deddia. 1995. Effect of drought on leaf development, biomass  production and nitrogen uptake of durum wheat grown in mediterranean environment. Aust. J. Agric. Res. 46: 99-111.

15- Grant, R. F. 1992. Interactions between carbon dioxide and water deficits affecting canopy  photosynthesis: simulation and testing. Crop sci. 32: 1322–1328.

16- Hossain, A. B. S., R. G. Sears, T. S. Cox, and G. M. Patterson. 1982. Dessication tolerance  and it's relationship to assimilate partitioning in winter wheat. Corp sci. 30: 622–627.

17- Judel, G. K., and K. Mengel. 1982. Effect of shading on nonstructural cvarbohydrates and  their  turnover  in  clum  and  leaves  during  grain  filling   period  of  spring  wheat.  Crop  sci. 22: 958 – 962.

18– Kiniry. R. J. 1993. Nonstructural carbohydrate utilization by wheat shaded grain growth.  Agron. J. 85: 844–849.

19- Mc Caig. T.N., and J. M. Clark. 1982. Seasonal changes in nonstructural carbohydrates levels  of wheat and out grown in semiarid environment. Crop sci. 22: 963–970.

20- Mc Kendry, A. L., P. B. E. Mcvetty, and L. E. Evans. 1995. Selection criteria for combining  high grain yield and high grain protein concentration in bread wheat. Crop sci. 35: 1597– 1602.

21- Oscarson, P., T. Lundborg, M. Larsson, and  C. M. Larsson.1995. Genotypic differences in  nitrate uptake and nitrogen utilization for spring wheat grown  hydroponically. Crop  sci. 35: 1056–1062.

22- Palata, J. A., T. Kobata, N. C. Turner, and I. R. Fillery. 1994. Remobilzation of carbon and  nitrogen in wheat as infulneced by postanthesis water deficits. Crop sci. 34: 118–124.

23- Papakosta, D. K. and A. A. Gayians. 1991. Nitrogen and dry matter accumulation, remobilization  and losses for mediterranean wheat during grain filling. Agron. J. 83: 864– 870. 

24- Vansanford, D. A. 1985. Variation in kernel growth characters among soft red winter. Crop  sci. 25: 626 – 630.

 25-Vansanford, D. A., and C. T. Mackown. 1987. Cultivar differences in nitrogen remobilization  during grain filling in soft  red winter wheat. Crop sci. 27: 295–300.