TAILIEUCHUNG - Genetic relationships of Turkish bread wheat cultivars

Forty-two bread wheat cultivars released up to 1990 in Turkey have been investigated in order to understand their genetic relationships. Correlation, regression and principal component analyses have been applied to cultivar-to-cultivar parentage coefficients and similarity indices based on pedigree data. | Tr. J. of Agriculture and Forestry 22 (1998) 333-340 © TÜBİTAK N. ZENCİRCİ Genetic Relationships of Turkish Bread Wheat Cultivars Nusret ZENCİRCİ Central Research Institute for Field Crops, : 226, Ankara-TURKEY Received: Abstract: Forty-two bread wheat cultivars released up to 1990 in Turkey have been investigated in order to understand their genetic relationships. Correlation, regression and principal component analyses have been applied to cultivar-to-cultivar parentage coefficients and similarity indices based on pedigree data. Correlation and regression analyses between cultivar-to-cultivar parentage coefficients and similarity indices have shown higher relationships implying that both estimates could be used interchangeably to predict genetic relationships in cultivars. Principal component analyses failed to group cultivars clearly, but some subgrouping were obtained. Türkiye Ekmeklik Buğday Çeşitlerinin Genetik İlişkileri Özet:Türkiye’de 1990 yılına kadar tescil ettirilmiş 42 ekmeklik buğday çeşidinin genetik ilişkileri, çeşitlerin soykütükleri yardımıyla elde edilen akrabalık ve benzerlik derecelerine korelasyon, regresyon ve ana bileşen analizi uygulanarak araştırıldı. Çeşitlerin akrabalık ve benzerlik derecelerine uygulanan korelasyon ve regresyon analizleri arasındaki yüksek ilişki; her iki yöntemin de çeşitler arasındaki benzerliklerin araştırılmasında kullanılabileceğini gösterdi. Ana bileşen analizi ile çeşitlerin kesin gruplandırılması yapılamadıysa da; bazı çeşitlerin küçük gruplar oluşturduğu saptandı. Introduction Variety improvement in which genitors with good combining ability utilized extensively and selection applied only for traits of interest has led to a decreased genetic variation in modern cultivars (1-7). The possibility selecting from a narrower genetic base has become smaller and risk encountered against yield limiting factors higher. The danger became evident when some epidemics occurred in various crops such as

• Nông nghiệp
• Bread wheat cultivars
• Principal component analyses
• Parentage coefficients
• Ancestor to cultivar coefficents
• Principal component analysis
• Boron deficiency
• Bread and durum wheat
• Yield attributes
• B efficient cultivars
• Genetic advance
• Bread wheat
• Genetic advance analysis in bread wheat
• Bread wheat genotypes
• Cultivars grown in randomized block design
• Diversity analysis of genetic
• Genetic diversity
• Quality characteristics of bread wheat
• Agricultural science
• Grain yield response index
• Bread wheat cultivars as influenced by nitrogen levels
• Agronomic efficiency
• Dry matter
• Waterlogging tolerant cultivars
• Yield limiting factors
• Cropping systems
• Bread Triticum aestivum L
• Durum wheat
• Boron fertilization
• Wheat cultivars
• Triticum aestivum
• North Sinai environmental conditions
• Crop simulation
• Resolving power
• SSR markers showed
• PIC values ranged
• Genome Biology
• Genome diversity
• Structural variation
• High quality assembly
• Plant Biology
• Founder parents
• Functional markers
• Ningxia wheat
• Overall genetic distribution
• Modern cultivars