FORAGE AND GRAIN YIELD PERFORMANCES OF SOYBEAN LINES

Field experiments were conducted to evaluate the yield and yield components of twelve soybean genotypes as a forage and a grain crop in Marmara Region of Turkey in 2003-2004 growing seasons. Forage and dry matter yield and yield components at one vegetative stage (V5) and two reproductive stages (R2, and R4) and seed yield was determined in all soybean genotypes. The experiments showed that the harvest stages had signifi cant effects on forage and dry matter yield, and R4 reproductive stage had the highest forage and dry matter yield. Dry matter partitioning of soybean plant parts was greatly affected by harvest stages, while the genotypes had little effect on dry matter partitioning of soybean plant parts. There were statistically signifi cant differences between soybean genotypes in seed yield, but the differences were small. The correlations between forage and dry matter yield and seed yield were not statistically signifi cant

Quality and yield response of soybean (Glycine max L. Merrill) to drought stress in sub–humid environment

The aim of the study was to determine the response of soybean [Glycine max (L.) Merr.] to drought at various stages of development in a sub-humid environment of Turkey. Drought-stress treatments was applied to plants in 2005 and 2006 by withholding irrigation at six critical stages: completely vegetative (fifth trifoliate) (T2), flowering (T3), podding (T4), seed fill (T5), full bloom + podding (T6), and podding + seed fill (T7). Growth and production was compared in each treatment to full irrigated (T1) and nonirrigated (T8) controls. Each drought treatment reduced shoot biomass and seed yield compared to wellwatered plants, but only  non-irrigated plants or plants droughted at vegetative or flowering stages produced fewer seed pods and seeds. Seed protein and oil content was highest among treatments when plants were droughted during the seed filling stage. Yield increased exponentially with crop water use and ranged from 2.1 - 2.5 tons haSup>-1 in non-irrigated plants to 3.5 - 4.0 tons ha-1 in the well-watered controls. However, plants droughted during the vegetative stage of development produced the highest yield per unit of irrigation water applied (that is,  irrigation water use efficiency). This research results will be useful for maximizing soybean production and/or seed quality when irrigation water is limited.Key words: Glycine max, flowering, irrigation, seed development, water use efficiency

FORAGE AND GRAIN YIELD PERFORMANCES OF SOYBEAN LINES

ABSTRACT Field experiments were conducted to evaluate the yield and yield components of twelve soybean genotypes as a forage and a grain crop in Marmara Region of Turkey in 2003-2004 growing seasons. Forage and dry matter yield and yield components at one vegetative stage (V5) and two reproductive stages (R2, and R4) and seed yield was determined in all soybean genotypes. The experiments showed that the harvest stages had signifi cant effects on forage and dry matter yield, and R4 reproductive stage had the highest forage and dry matter yield. Dry matter partitioning of soybean plant parts was greatly affected by harvest stages, while the genotypes had little effect on dry matter partitioning of soybean plant parts. There were statistically signifi cant differences between soybean genotypes in seed yield, but the differences were small. The correlations between forage and dry matter yield and seed yield were not statistically signifi cant

Effects of different row spacing on yield and yield components of some chickpea varieties under Bursa ecological conditions

Bu araştırma, Bursa ekolojik koşullarında bazı nohut çeşitlerinde farklı sıra aralıklarının verim ve verim komponentleri üzerine etkilerini belirlemek amacıyla 1995/96 ve 1996/97 vejetasyon dönemlerinde Uludağ Üniversitesi Ziraat Fakültesi Tarımsal Araştırma ve Uygulama Merkezi 'nde yürütülmüştür. Araştırmada, Yerli ve Camtez nohut çeşitleri ile 5 farklı sıra arası mesafesi (20, 30, 40, 50 ve 60 cm) kullanılmıştır. Araştırma sonucunda farklı sıra aralıklarının verim komponentleri üzerine etkisi farklı olmuştur. Bitki boyu, ilk baklanın yerden yüksekliği 60 cm sıra arası mesafesinde, bakla eni ise 50 cm sıra arası mesafesinde en yüksek değerleri vermişlerdir. Ana. dal sayısı, yan dal sayısı, bitkide bakla sayısı, bitkide tane sayısı, baklada tane sayısı, bakla boyu, bitki verimi, biyolojik verim, tane verimi, hasat indeksi ve 1000 tane ağırlığı üzerine sıra arası mesafelerinin etkisi istatistiksel olarak önemli bulunmamıştır.This research was carried out to determine the effects of different row distances on the yield and yield components of some chickpea varieties under Bursa ecological conditions at Uludağ University, Agricultural Faculty, Agricultural Research and Application Center in the vegetation periods of 1995/96 and 1996/97. Yerli and Carutez chickpea varieties were taken to the experiment in 5 different row distances (20, 30, 40, 50 and 60 cm). The results of this research showed that different row distances had different effect on yield components. While plant height, first pod forming node height gave the highest values at 60 cm row distance and pod width gave the highest value at 50 cm row distance. Effect of plant density was not significant on number of primary branches, number of secondary branches, number of pods plant"1, number of seeds plant"1, number of seeds pod _1, pod lenght, seed yield plant ~l, biological yield, seed yield, harvest index and 1000 seed weight

Investigation of Correlation between Traits and Path Analysis of Confectionary Sunflower Genotypes

Abstract. This study examined the relationships between various traits associated with seed and crude protein yields of confectionary sunflower as well as the direct and indirect effects of these traits on crude protein yield. Eight open-pollinated confectionary sunflower populations and two open-pollinated confectionary sunflower cultivars used as control varieties were evaluated during two growing seasons (2009 and 2010). Certain agronomical and technological traits such as plant height, head diameter, seed yield, 1000-seed weight, kernel ratio, crude protein ratio, and crude protein yield were measured for the study. The results for the individual years and the combined data for both years revealed that there were significant positive correlations between the seed yield and the plant height, head diameter, 1000-seed weight and crude protein yield. The crude protein yield was also positively and significantly correlated with the 1000-seed weight and the seed yield, but the correlations with the plant height, head diameter, kernel ratio and crude protein ratio were not significant. The path coefficients from path analysis indicated that the seed yield had the maximum positive direct effect on the crude protein yield, followed by the crude protein ratio. The greatest positive indirect effects on the crude protein yield were attributed to the 1000-seed weight, plant height and head diameter through their effects on seed yield. The magnitudes of the direct effects of the seed yield and the crude protein ratio on the crude protein yield were 79.2% and 56.9%, respectively. Hence, selection based on seed yields, 1000-seed weights and crude protein ratios could be used to improve crude protein yield in confectionary sunflower breeding programs

The Heterosis and Combining Ability of Diallel Crosses of Rapeseed Inbred Lines

The heterosis and combining ability of four rapeseed (Brassica napus L.) genotypes were estimated using diallel crosses. An experiment was conducted at Uludag University, Bursa, Turkey, during the 2005-2006 and 2006-2007 growing seasons using 4x4 full diallel crosses. All of the 12 F1 hybrids and their parents were planted in a randomized complete block design with three replications. The data obtained from the experiment were subjected to an analysis of variance. The analysis of variance indicated significant differences among parents and their hybrids in the F1 generation for all the characters studied except for 1000-seed weight, which was non-significant. Positive better-parent heterosis for seed yield per plant were found in all 12 hybrids tested. An analysis of the components of combining ability showed that general combining ability (GCA) and reciprocal combining ability (RCA) were highly significant (p ≤ 0.01) for plant height and number of pods per main raceme, whereas specific combining ability (SCA) was highly significant for all traits but 1000-seed weight. The parent genotypes PR1, PR3 and PR4 with the hybrids PR1 x PR3 and PR1 x PR4 showed higher GCA and SCA effects, respectively, and therefore could be used to develop high-yielding lines.<br /