Environmental stability and heritability estimates for grain yield and test weight in triticale

• Autorzy: Barnett R D , Blount A R , Pfahler P L , Bruckner P L , Wasenberg D M , Johnson J W
• Języki publikacji: EN

Abstrakty

EN

Hexaploid triticale has many advantages over both parental species for both grain and forage production in certain environments. Additional information on environmental stability and heritability would be desirable to develop appropriate selection strategies in the production of superior widely-adapted cultivars. The grain yield of 22 diverse genotypes grown at four ecologically-distinct geographical locations [Quincy, FL, USA (approximate geographical coordinates (AGC) = 30°N 84°W, approximate elevation (AE) = 58 m), Plains, GA, USA (AGC = 32°N 84°W, AE = 76 m), Bozeman, MT USA (AGC = 45°N 111°W, AE = 1458 m), and Aberdeen, ID, USA (AGC = 42°N 112°W, AE = 1360 m)] was measured in two years with winter and spring planting dates only at Bozeman and Aberdeen. Test weight (grain weight in a given volume) was determined for two years at Bozeman and Aberdeen at both planting dates and one year at Quincy. Stability analyses indicated that significant (P <0.01) variation in means, regression coefficients, and deviation mean squares of the genotypes were present for both characters. Realized heritability (h²) estimates were as follows: grain yield ranged from -0.02 to 0.80 with a mean of 0.57; test weight ranged from 0.63 to 1.05 with a mean of 0.93. The results indicated that substantial genetic variation is present and selection for widely-adapted cultivars would be effective for both characters especially test weight.

Słowa kluczowe

EN

genotype-environment interaction; hexaploid triticale; triticale; grain yield; genotypic variation; selection response; genetic selection; Triticosecale; plant genetics

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 2006
• Tom: 47
• Numer: 3
• Opis fizyczny: p.207-213,ref.

Twórcy

autor

Barnett R D

• North Florida Research and Education Center, University of Florida, Gainesville, FL 32611-0500, USA

autor

Blount A R

• North Florida Research and Education Center, University of Florida, Gainesville, FL 32611-0500, USA

autor

Pfahler P L

• Agronomy Department, University of Florida, Gainesville, Florida, USA

autor

Bruckner P L

• Plant Sciences and Plant Pathology Department, Montana State University, Bozeman, USA

autor

Wasenberg D M

• USDA/ARS, National Small Grains Collection, Aberdeen, USA

autor

Johnson J W

• Crop and Soil Sciences Department, Georgia Experiment Station, Griffin, USA

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