The Relationship Between Flag Leaf Senescence and Grain Yield of

Authors : Murat TİRYAKİOĞLU

Pages : 382-393

Doi:10.1501/Tarimbil_0000001341

View : 17 | Download : 9

Publication Date : 2015-08-12

Article Type : Research Paper

Abstract :This study aimed at investigating genotypic differences in the leaf area duration of durum wheat genotypes during grain filling periods and their relation to grain yield under two different irrigation conditions. The experiments were designed randomized complete block design for four replication in 2009/2010 and 2010/2011. Irrigation levels in main plots, cultivars were included in the sub plots. The study gathered data of six genotypes with similar anthesis times in Antakya/Hatay-Turkey. During the growth period, the two groups of plants received general management techniques and 60 kg ha -1 phosphorus and 80 kg ha -1 nitrogen insert ignore into journalissuearticles values(ammonium sulphate); fertilizer. Two different irrigation regimes were applied; the control group received full irrigation until reaching physiological maturity, while the experiment group was not irrigated after anthesis but instead received rainfall characteristic of WANA insert ignore into journalissuearticles values(West Asia North Africa);. Results showed that flag leaf area insert ignore into journalissuearticles values(FLA); and lower leaf area insert ignore into journalissuearticles values(LLA); were not significantly related to spike grain yield insert ignore into journalissuearticles values(SGY); under control conditions. Flag leaf area duration insert ignore into journalissuearticles values(FLAD); was not related to grain yield, while the increase in lower leaf area duration insert ignore into journalissuearticles values(LLAD); reduced grain yield. Meanwhile, a positive relation was observed between FLA and SGY under experimental conditions, since SGY significantly increased according to the increase of FLAD. Moreover, high FLAD positively contributed to grain filling under both the conditions, while high LLAD partly contributed only under control conditions. These results suggest that the genotypes with low leaf number or short plant height and low tillering capacity should receive significant irrigation, while genotypes with middling plant height should be planted during conditions of drought stress. Under both the sets of conditions genotypes must have high FLAD.
Keywords : Bayrak yaprak alanı, Alt yaprak alanı, Yaprak alan sürekliliği, Kuraklık stresi, Dane verimi, Buğday