Kendilenmiş Mısır Hatlarının Kuraklık Stresine Tolerans Düzeylerinin Belirlenmesi

Year 2019, , 178 - 189, 22.04.2019

Şekip Erdal

https://doi.org/10.30910/turkjans.556598

Cited By: 1

Abstract

Bu çalışmanın amacı, kuraklık stresine toleranslı hibrit çeşitleri
geliştirmek için kendilenmiş mısır hatlarını kuraklığa tolerans açısından
taramaktır. Çalışmada at dişi ve sert tane tipine sahip 20 adet mısır hattı
2012 ve 2013 yıllarında normal (sulu) ve kuraklık stresi denemelerinde
değerlendirilmiştir. Denemeler tesadüf blokları deneme desenine göre 3
tekerrürlü olarak ekilmiştir.  Normal
denemede mevcut nem tarla kapasitesinde tutulurken, kuraklık stresi denemesinde
bitkiler V10-12 gelişme döneminden (takriben çiçeklenme tarihinden 2-3 hafta
önce) itibaren strese maruz bırakılmıştır. Denemelerde kuraklık stresi
çalışmalarında en çok öne çıkan seleksiyon kriterleri olan erkek ve dişi çiçek
arasındaki gün farkı (EDF), bitki başına koçan sayısı (BBKS), koçanda tane
sayısı (KTS), yaprak kuruma düzeyi ve tane verimi özellikleri incelenmiş ve
stres indeksleri ile hatlar kuraklığa toleranslılık bakımından karakterize
edilmiştir. Araştırma sonucunda, Ant İ-69 (229.4 kg/da), TK 72 (220.5 kg/da),
Ant-24702 (196.4 kg/da), Ant İ-39 (174.6 kg/da) ve Ant İ-09 (146.8 kg/da)
hatları tane verimi bakımından kuraklık stresine en toleranslı hatlar olurken,
Ant 910255 (27.6 kg/da), Ant İ-46 (28.2 kg/da), Ant İ-82 (29.0 kg/da) ve Ant
İ-08 (45 kg/da) en hassas hatlar olarak tespit edilmişlerdir. Ant İ-69, TK 72,
Ant-24702, Ant İ-39 ve Ant İ-09 hatları aynı zamanda EDF, BBKS, KTS ve yaprak
kuruma düzeyi ve stres tolerans indeksleri bakımındanda en çok öne çıkan hatlar
olmuşlardır. Araştırma sonucunda kullanılan mısır genetik materyalinin
kuraklığa tolerans ıslahı için değerlendirilebileceği öngörülmüş ve seçilen
mısır hatları gelecek dönem çalışmaları için önerilmiştir.

Keywords

Mısır, kendilenmiş hat, kuraklık stresi, verim

Determination of Drought Tolerance Levels of Maize Inbred Lines

Abstract

The objective of the study was to test maize inbred
lines for drought tolerance. In the study twenty dent and flint temperate maize
inbred lines were evaluated in well-watered and drought stress conditions in
2012 and 2013. Experiments conducted according to Randomized Complete Block
Design with three replications. Drought stress was achived at the flowering by
withdrawn water approximately 2-3 weeks before flowering. Anthesis-silking
interval (ASI), number of ears per plant (EPP), number of kernels per ear
(KPE), senescence and yield traits which are used as the most important
selection criterions were evaluated. Also stress indices were used for line
identification to drought. The result of the study showed  that, Ant I-69 (229.4 kg/da), TK 72 (220.5
kg/da), Ant-24702 (196.4 kg/da), Ant I-39 (174.6 kg/da) and Ant I-09 (146.8
kg/da) were determined as the most tolerant lines to drought, while Ant 910255
(27.6 kg/da), Ant I-46 (28.2 kg/da), Ant I-82 (29.0 kg/da) and Ant I-08 ( 45
kg/da) inbreds were identified as the sensitive lines in terms of yield.
Tolerant promising lines Ant I- 69, TK 72, Ant-24702 , Ant I-39 and Ant I-09
were also had good performance in terms of secondary traits such as  ASI, number of ears per plant, number of
kernel per ear, senescence, yield reduction ratio, drought resistance index and
stress tolerance index.In conclusion, it was envisaged that tested maize
germplasm can be assessed for breeding drought tolerance and selected maize
inbred lines were proposed for future studies.

Keywords

Maize, inbred line, drought tolerance, yield

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