Selection for Test Weight and Kernel Weight in High Yielding Wheat Using a Safety-First Index

Emre İLKER; Metin ALTINBAŞ; Muzaffer TOSUN

Makale detayları

Selection for Test Weight and Kernel Weight in High Yielding Wheat Using a Safety-First Index

Yazarlar:

Emre İLKER | Metin ALTINBAŞ | Muzaffer TOSUN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2009 Vol.33 Issue 1, pp.37-45

Belge Tipi:

Makale

Yayın Tarihi:

12/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000808531

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Anahtar kelimeler:

Özet:

 

Five breeding lines and 4 cultivars were grown in replicated trials at 1 location in 1999-2000 and 2 locations in 2000-2001 cropping seasons in İzmir in order to determine the usefulness of a safety-first selection index in making selection among high yielding wheat genotypes for test weight and thousand-kernel weight. Genotype × environment interactions were significant for these 2 quality traits. The regression coefficient (bi) of genotypes, variance (Sii2) of a genotype across environments, and a safety-first index (Ii) were calculated to evaluate the stability of genotypes for test weight and thousand-kernel weights. Wheat genotypes with lower bi values and small variance (Si2) across environments (the most stable ones) tended also to have lower means for these 2 traits. However, those genotypes with the largest value of index (Ii), which is considered desirable, were found to have the highest mean values for both test weight and thousand-kernel weight. The rank-correlation coefficient between (Ii) and (Yi) values was significant for thousand-kernel weight. The ranking from Ii was significantly correlated with the rankings from the stability parameters bi and  Si2 for test weight. The rank-correlation coefficients between bi and Si2 for the 2 physical quality traits were highly significant and of similar magnitude (r = 0.983). It was concluded that a safety-first selection index can be useful in plant breeding for the improvement of wheat cultivars with enhanced stability and consistency of quality characteristics when genotype × environment interaction is present.

 

Five breeding lines and 4 cultivars were grown in replicated trials at 1 location in 1999-2000 and 2 locations in 2000-2001 cropping seasons in İzmir in order to determine the usefulness of a safety-first selection index in making selection among high yielding wheat genotypes for test weight and thousand-kernel weight. Genotype × environment interactions were significant for these 2 quality traits. The regression coefficient (bi) of genotypes, variance (Sii2) of a genotype across environments, and a safety-first index (Ii) were calculated to evaluate the stability of genotypes for test weight and thousand-kernel weights. Wheat genotypes with lower bi values and small variance (Si2) across environments (the most stable ones) tended also to have lower means for these 2 traits. However, those genotypes with the largest value of index (Ii), which is considered desirable, were found to have the highest mean values for both test weight and thousand-kernel weight. The rank-correlation coefficient between (Ii) and (Yi) values was significant for thousand-kernel weight. The ranking from Ii was significantly correlated with the rankings from the stability parameters bi and  Si2 for test weight. The rank-correlation coefficients between bi and Si2 for the 2 physical quality traits were highly significant and of similar magnitude (r = 0.983). It was concluded that a safety-first selection index can be useful in plant breeding for the improvement of wheat cultivars with enhanced stability and consistency of quality characteristics when genotype × environment interaction is present.

Makale detayları

Selection for Test Weight and Kernel Weight in High Yielding Wheat Using a Safety-First Index

Yazarlar:

Emre İLKER | Metin ALTINBAŞ | Muzaffer TOSUN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2009 Vol.33 Issue 1, pp.37-45

Belge Tipi:

Makale

Yayın Tarihi:

12/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000808531

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Bread wheat

yield

safety-first index

physical quality traits

rank correlation

Sayı

Makale detayları

Selection for Test Weight and Kernel Weight in High Yielding Wheat Using a Safety-First Index

Yazarlar: Emre İLKER | Metin ALTINBAŞ | Muzaffer TOSUN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Agriculture and Forestry 2009 Vol.33 Issue 1, pp.37-45

Belge Tipi: Makale

Yayın Tarihi: 12/2008

Belge Dili: Türkçe

Document ID (Org No.): 2000808531

Sıklık: İki Aylık

eISSN: 1303-6173

pISSN: 1300-011X

Bread wheat

yield

safety-first index

physical quality traits

rank correlation

Sayı

Yazarlar:

Emre İLKER | Metin ALTINBAŞ | Muzaffer TOSUN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2009 Vol.33 Issue 1, pp.37-45

Belge Tipi:

Makale

Yayın Tarihi:

12/2008

Belge Dili:

Türkçe

Document ID (Org No.):

2000808531

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X