Abstract
The objective of this study was to evaluate the ability of several selection indices to identify drought tolerant/resis tant genotypes under different conditions of Konya. Thirtysix bread wheat genotypes (twenty four pure lines from Turkish bread wheat landraces and twelve modern bread wheat cultivars) were evaluated under both moisture stress (rainfed) and non stress (irr igated) conditions using arandomized complete block designwith three replications. Nine drought tolerance indices including yield stability index (YSI), yield index (YI), superiority index (P i), stress tolerance index (STI), geometric mean productivity (GMP), stress susceptibility index (SSI), mean productivity (MP), stress tolerance (TOL), harmonic mean (HM) and linear regression coefficient (b i) were calculated. The indices were adjusted based on grain yield un der drought condition (Ys) andnormal conditions (Yp). SSI is suggested as useful indicator for wheat breeding where the stress is severe while MP, GMP, TOL HM and STI are suggested if the stress is less severe. Biplot analysis was used to explain relationship between grain yield and drought indices. Karahan-99, Bayraktar-2000, Gerek- 79, PL-7, Snmez-2000, K�1raA -66 and PL-5were the superior genotypes for both rainfed an d irrigated conditions with high PC1 and low PC2.PL-25, PL-13 and PL-23with high PC2 were more suitable for rainfed than irrigated conditions.
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Claims 4
Claim · model-written summary
SSI was suggested as a useful wheat breeding indicator under severe stress.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- SSI is suggested as useful indicatore0
- Qualifier
- where the stress is severee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SSI is suggested as useful indicator for wheat breeding where the stress is severe”
Claim · model-written summary
MP, GMP, TOL, HM, and STI were suggested for less severe stress.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- MP, GMP, TOL HM and STI are suggestede0
- Qualifier
- if the stress is less severee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MP, GMP, TOL HM and STI are suggested if the stress is less severe”
t0“WHEAT”
Claim · model-written summary
Karahan-99, Bayraktar-2000, Gerek- 79, PL-7, Snmez-2000, K�1raA -66 and PL-5 were superior under rainfed and irrigated conditions, with high PC1 and low PC2.
- Taxon
- WHEATTriticum aestivumt0
- Material
- Karahan-99, Bayraktar-2000, Gerek- 79, PL-7, Snmez-2000, K�1raA -66 and PL-5e0
- Outcome
- superior genotypes for both rainfed an d irrigated conditionse0
- Direction
- superiore0
- Qualifier
- high PC1 and low PC2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Karahan-99, Bayraktar-2000, Gerek- 79, PL-7, Snmez-2000, K�1raA -66 and PL-5were the superior genotypes for both rainfed an d irrigated conditions with high PC1 and low PC2”
t0“WHEAT”
Claim · model-written summary
PL-25, PL-13 and PL-23 were more suitable for rainfed than irrigated conditions.
- Taxon
- WHEATTriticum aestivumt0
- Material
- PL-25, PL-13 and PL-23e0
- Outcome
- suitable for rainfed than irrigated conditionse0
- Direction
- more suitablee0
- Qualifier
- high PC2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PL-25, PL-13 and PL-23with high PC2 were more suitable for rainfed than irrigated conditions”
t0“WHEAT”