EFFECT OF A LEAF-SPOTTING GENE ON THE YIELD AND YIELD COMPONENT DEVELOPMENT OF BARLEY IN NORTHERN CANADA

1978 ◽  
Vol 58 (1) ◽  
pp. 21-28 ◽  
Author(s):  
D. G. FARIS
Keyword(s):  
Yield Components ◽  
Leaf Size ◽  
Yield Component ◽  
Yield Potential ◽  
Yield Reduction ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Yield And Yield Components ◽  
Before And After ◽  
Component Development

Two isogenic lines, normal and spotted-leaf, of Awnless Atlas barley (Hordeum vulgare L.) were grown at four seeding rates for 3 yr at Beaverlodge in northern Alberta. Rate and year caused highly significant differences in yield and yield components. However, seeding rate had little effect on reductions in yield and yield components caused by the leaf-spotting gene. Although leaf spotting appeared to cause little reduction in the photosynthetic area before heading, the reduction was enough to decrease head, plant and leaf size. The heavy leaf spotting that developed after heading contributed to a 22% yield reduction. Compared with a similar study at Davis, California, the results of the present study suggest that the longer photoperiod and higher temperature at Beaverlodge prior to heading depressed yield potential and increased the adverse effect of the leaf-spotting gene. The results suggest that leaf area, both before and after anthesis, is important for yield development and expression.

Yield Potential of Heterozygous Seedling Lethal Mutants of Barley (Hordeum vulgare L.)

1981 ◽  
Vol 97 (1) ◽  
pp. 183-187
Author(s):  
M. M. Rahman
Keyword(s):  
Hordeum Vulgare ◽  
Yield Components ◽  
Yield Component ◽  
Single Locus ◽  
Yield Potential ◽  
Hordeum Vulgare L ◽  
Yield And Yield Components ◽  
Number Of Seeds

SUMMARYThe effects of homozygous and heterozygous loci of 20 seedling lethal mutants on yield and yield components of barley (Hordeum vulgare L.) were studied. Nine of the 20 populations studied exhibited one locus heterosis (positive or negative advantages of Aa genotype compared with AA genotype) for yield per plant or one or more components of yield. In five instances of significance all showed positive single locus (Aa) heterosis for number of seeds per spike. Seedling lethal mutants, Ac ac and Alb,, p alb,, p showed three yield-component-heterosis. These two mutants might be suitable for hybrid barley production.

scholarly journals Penampilan Fenotipik Karakter Hasil Galur Harapan Padi Rawa di Lahan Pasang Surut Karang Agung, Sumatera Selatan

2016 ◽  
Vol 17 (1) ◽  
pp. 19
Author(s):  
Rini Hermanasari ◽  
NFN Supartopo ◽  
B. Kustianto
Keyword(s):  
Plant Height ◽  
Yield Components ◽  
Rice Field ◽  
Block Design ◽  
Yield Component ◽  
Yield Potential ◽  
Lower Yield ◽  
Tidal Swamp ◽  
Randomized Complete Block Design ◽  
Yield And Yield Components

<p>Phenotypic Performance of Yield and Yield Component of Rice Promising Lines at Tidal Swamp Area in Karang Agung, South Sumatra. An experiment was conducted in Karang Agung, in April until September 2007. The experiment aimed at evaluating phenotypic performance of yield and yield components of promising lines in tidal swamp rice field. The experiment was arranged in a Randomized Complete Block Design with 16 treatments and four replications. The promising lines tested were B9858-KA-55, B9833C-KA-14, B9852E-KA-66, B5524G-SM-61-2-1, B7003D-MR-24-3-1, KAL9414F-MR-2-KN-0, KAL9418F-MR-2-KN-0, B10214FTB- 7-2-3, IR70213-9-CPA-12-UBN-2-1-3-1, IR70215-2- CPA-2-1-B-1-2. The check varieties used were IR42, Batanghari and Lembu Sawah. The results of this experiment showed that IR61242-3B-B-2 had better performance among varieties and promising lines tested, as well as giving the highest yield potential. Meanwhile, the line B10214F-TB-7-2- 3 had better performance of number of filled grain, and 1.000 grain weight. It also showed higher yield potential compared to IR42 and Batanghari. The line KAL9418F-MR-2-KN-0 had better performance of plant height, 1.000 weight grain and harvest age, but showed lower yield potential compared to those other check varieties.</p><p> </p><p><strong>Abstrak</strong></p><p>Percobaan dilaksanakan di KP Karang Agung, Sumatera Selatan pada bulan April sampai September 2007. Penelitian bertujuan untuk mendapatkan informasi tentang penampilan fenotipik karakter hasil dan komponen hasil dari galur-galur harapan padi rawa di lahan pasang surut Karang Agung. Percobaan ditata dalam rancangan acak kelompok dengan 16 perlakuan dan empat ulangan. Galur-galur yang diuji di antaranya B9858-KA-55, B9833C-KA-14, B9852E-KA-66, B5524GSM- 61-2-1, B7003D-MR-24-3-1, KAL9414F-MR-2-KN-0, KAL9418F-MR-2-KN-0, B10214F-TB-7-2-3, IR70213-9- CPA-12-UBN-2-1-3-1, dan IR70215-2-CPA-2-1-B-1-2. Varietas pembanding digunakan IR42, Batanghari, dan Lembu Sawah. Hasil penelitian menunjukkan bahwa galur IR61242- 3B-B-2 memiliki penampilan lebih baik dari varietas pembanding untuk karakter tinggi tanaman, jumlah gabah isi, bobot 1.000 butir gabah, dan potensi hasil. Galur B10214F-TB-7-2-3 memberikan penampilan lebih baik untuk karakter jumlah gabah isi, bobot 1.000 butir, dan potensi hasil lebih tinggi daripada pembanding IR42 dan Batanghari. Galur KAL9418F-MR- 2-KN-0 memiliki penampilan lebih baik untuk karakter bobot 1.000 butir, tinggi tanaman, dan umur panen, tetapi potensi hasilnya lebih rendah dari ketiga varietas pembanding.</p>

EFFECT OF RATE AND DATE OF SEEDING ON YIELD AND YIELD COMPONENTS OF TWO WINTER WHEAT CULTIVARS GROWN IN ONTARIO

1979 ◽  
Vol 59 (4) ◽  
pp. 939-943 ◽  
Author(s):  
A. E. SMID ◽  
R. C. JENKINSON
Keyword(s):  
Winter Wheat ◽  
Yield Components ◽  
Test Weight ◽  
Yield Reduction ◽  
Wheat Cultivars ◽  
Seeding Rate ◽  
Yield And Yield Components ◽  
Winter Wheat Cultivars

Two cultivars of soft white winter wheat, Fredrick and Yorkstar, were sown at rates of 34, 67, 101, 134 and 168 kg/ha on or near 24 Sept., 9 Oct. and 23 Oct. in each of the 3 yr 1973–1975, at Ridgetown, Ontario. Highest net yields were obtained with rate of seeding 134 kg/ha. Seeding rate did not affect lodging. Yield per hectare and spikes per hectare were positively correlated while kernels per spike and spikes per hectare were negatively correlated. However, as the rate of seeding was increased, the increase in the number of spikes per hectare was greater than the accompanying decrease in kernels per spike, resulting in a net overall increase in yield. Highest yields of Fredrick were obtained near 9 Oct. and those of Yorkstar near 24 Sept. Yields decreased more rapidly with delayed seeding when seeding rates were less than 134 kg/ha, especially with Yorkstar. Test weight of Yorkstar was low, especially when sown late. Fredrick yielded 3–25% more than Yorkstar. A delay in seeding beyond 9 Oct. resulted in a yield reduction of 23 kg/ha/day. Fredrick should be sown instead of Yorkstar when seeding is delayed beyond recommended dates of seeding.

scholarly journals EFFECT OF FARM YARD MANURE APPLICATION RATE ON YIELD AND YIELD COMPONENTS OF LETTUCE (LACTUCA SATIVA) AT JIMMA SOUTHWESTERN ETHIOPIA

2016 ◽  
Vol 4 (8) ◽  
pp. 75-83
Author(s):  
Wendimu Melese
Keyword(s):  
Yield Components ◽  
Leaf Size ◽  
Experimental Tests ◽  
Application Rate ◽  
Yield Component ◽  
Small Scale ◽  
Farm Yard Manure ◽  
Manure Application ◽  
Southwestern Ethiopia ◽  
Yield And Yield Components

The current study was conducted at Jimma University College of Agriculture and Veterinary Medicine of Ethiopia to find the effect of farm yard manure application rate on yield and yield component of lettuce. The experiment was arranged at three levels of farm yard manure (5 ton/ha, 10 ton/ha and 15 ton/ha).  Each treatment was arranged as 1.1 kg, 2.25 kg and 3.3 kg/1.5 m2as T2, T3 and T4 respectively, and the control (0 kg/1.5 m2) as T1. A total of four treatments have been used. As the experimental tests showed that, farm yard manure with the rate of 3.3kg (15 ton/hek) is highly increased the yield and yield components of lettuce (plant height, leaf size, number of leaf per plant, fresh leaf weight, root depth and number of root per plant. Hence, it is recommended for general cultivation of lettuce under Jimma growing condition. Moreover, as the crop is growing at small scale farmer’s level in Jimma area further studies are needed with regard to the improvement of agronomic practices for lettuce at commercial level cultivation in Jimma and similar agro ecology.

YIELD COMPONENT DEVELOPMENT IN FOUR ISOGENIC BARLEY LINES DIFFERING IN AWN LENGTH

1974 ◽  
Vol 54 (2) ◽  
pp. 315-322 ◽  
Author(s):  
D. G. FARIS
Keyword(s):  
Hordeum Vulgare ◽  
Yield Components ◽  
Early Ontogeny ◽  
Yield Component ◽  
High Yield ◽  
Hordeum Vulgare L ◽  
Breeding Programs ◽  
Isogenic Lines ◽  
Component Development ◽  
Northern Alberta

Four backcross-derived isogenic lines of Atlas barley (Hordeum vulgare L.) differing in awn length (Full-, Half-, Quarter-awned and Awnless) were grown in the field for 3 yr in northern Alberta. On the average the highest yielding line was Half-awned outyielding (P < 0.10) Awnless by 5%. Weight per seed was linearly related to awn length with a regression of 0.33 mg/cm of awn. Examination of other components of yield showed that increased awn length was associated with reduced number of spikes and florets per plant. The results suggested that the magnitude of these yield components was partially dependent on competition for nutrients during the early ontogeny of the spike between the awns at the base and the developing florets at the tip of the spike. The long daylength was suggested as a factor which might put Full-awned at a disadvantage at Beaverlodge despite high yield levels there. Application of the findings to barley breeding programs is proposed.

Effect of varying seeding date on crop development, yield and yield components in canaryseed

2000 ◽  
Vol 80 (1) ◽  
pp. 83-86 ◽  
Author(s):  
Perry R. Miller
Keyword(s):  
Drought Stress ◽  
Yield Components ◽  
Yield Reduction ◽  
Summer Drought ◽  
Degree Days ◽  
Hordeum Vulgare L ◽  
Seeding Date ◽  
Crop Development ◽  
Yield And Yield Components ◽  
Phalaris Canariensis

The effects of varying seeding date on crop development, yield and yield components in canaryseed (Phalaris canariensis L.) have not been previously reported. In 1996 and 1997, a seeding date study was conducted at Swift Current, SK, which included barley (Hordeum vulgare L.), canaryseed and wheat (Triticum aestivum L.) sown at three dates in separate tilled fallow and untilled wheat stubble sites. Terminal summer drought occurred in both years of this experiment. Cumulative degree days (DD0) to reach maturity did not differ significantly among seeding dates for barley, or for wheat in 1997, while cumulative degree days to reach maturity decreased by 60 DD0 with delayed seeding for wheat in 1996. In contrast, cumulative degree days to reach maturity in canaryseed increased by 70 DD0 in 1996 and by 90 DD0 in 1997 with delayed seeding. Delaying seeding from the early to the late date decreased canaryseed yield by 29%, while barley and wheat yields decreased only 14 and 11%, respectively. Panicle density in canaryseed was reduced 24% between the early and late seeding dates, while barley and wheat spike densities were reduced only 2 and 6%, respectively. The large yield reduction in canaryseed was likely due to slowed crop development with delayed seeding, which intensified late-season drought stress. The slowed crop development with delay in seeding date in canaryseed may be due to vernalization requirement in this crop. In the semiarid prairie region, canaryseed should be seeded early to maintain a rapid crop development rate to minimize yield loss due to drought stress. Key words: Canaryseed, Phalaris canariensis L., seeding date, drought stress

scholarly journals Seeding Rate Effects on Hybrid Spring Wheat Yield, Yield Components and Quality

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1240
Author(s):  
Peder K. Schmitz ◽  
Joel K. Ransom
Keyword(s):  
Spring Wheat ◽  
Yield Components ◽  
Wheat Yield ◽  
Triticum Aestivum L ◽  
Yield Component ◽  
Economic Feasibility ◽  
Protein Yield ◽  
Seeding Rate ◽  
Hard Red Spring Wheat ◽  
End Use

Agronomic practices, such as planting date, seeding rate, and genotype, commonly influence hard red spring wheat (HRSW, Triticum aestivum L. emend. Thell.) production. Determining the agronomic optimum seeding rate (AOSR) of newly developed hybrids is needed as they respond to seeding rates differently from inbred cultivars. The objectives of this research were to determine the AOSR of new HRSW hybrids, how seeding rate alters their various yield components, and whether hybrids offer increased end-use quality, compared to conventional cultivars. The performance of two cultivars (inbreds) and five hybrids was evaluated in nine North Dakota environments at five seeding rates in 2019−2020. Responses to seeding rate for yield and protein yield differed among the genotypes. The AOSR ranged from 3.60 to 5.19 million seeds ha−1 and 2.22 to 3.89 million seeds ha−1 for yield and protein yield, respectively. The average AOSR for yield for the hybrids was similar to that of conventional cultivars. However, the maximum protein yield of the hybrids was achieved at 0.50 million seeds ha−1 less than that of the cultivars tested. The yield component that explained the greatest proportion of differences in yield as seeding rates varied was kernels spike−1 (r = 0.17 to 0.43). The end-use quality of the hybrids tested was not superior to that of the conventional cultivars, indicating that yield will likely be the determinant of the economic feasibility of any future released hybrids.

scholarly journals Effects of Iron and Zinc Spray on Yield and Yield Components of Wheat (Triticum Aestivum L.) in Drought Stress

2013 ◽  
Vol 46 (1) ◽  
pp. 23-32 ◽  
Author(s):  
F. Monjezi ◽  
F. Vazin ◽  
M. Hassanzadehdelouei
Keyword(s):  
Drought Stress ◽  
Seed Yield ◽  
Yield Components ◽  
Block Design ◽  
Control Treatment ◽  
Yield Reduction ◽  
Irrigation Level ◽  
Seed Filling ◽  
Yield And Yield Components ◽  
Iron And Zinc

Abstract In hot and arid regions, drought stress is considered as one of the main reasons for yield reduction. To study the effect of drought stress, iron and zinc spray on the yield and yield components of wheat, an experiment was carried out during the crop seasons of 2010 and 2011 on Shahid Salemi Farm in Ahwaz as a split factorial within randomized complete block design with three replications. The main plots with irrigation factor and three levels were considered: Level A) full irrigation, Level B) stopping irrigation at pollination step, and Level C) stopping irrigation at the seed filling stage. Subsidiary plots were considered with and without iron and zinc spray. Influencing the seed filling process, in interaction with iron, wich is an important leaf's chlorophyll cation, zinc increased the seed yield. The drought stress reduced the thousand kernels weight (TKW) and the number of seeds per spike increased about 24% and 8.5% more than the one of control treatment, respectively. Using iron, as compared with control treatment, causes the increase of thousand kernels weight from 45.71 to 46.83 grams and the increase of spike from 49.51 to 51.73. Zinc spray increased seed yield and thousand kernels weight. The results obtained from the present research showed that iron and zinc spray has fairly improved the effects caused by drought stress.

scholarly journals COMPARISON OF YIELD AMONG DIFFERENT HIGH YIELDING VARIETIES OF WETLAND RICE

Agric ◽  
2021 ◽  
Vol 33 (1) ◽  
pp. 57-66
Author(s):  
Kiki Kusyaeri Hamdani ◽  
Yati Haryati
Keyword(s):  
Yield Components ◽  
Block Design ◽  
Yield Component ◽  
Yield Potential ◽  
Duncan Multiple Range Test ◽  
Rice Varieties ◽  
Randomized Complete Block Design ◽  
High Yielding Varieties ◽  
Range Test ◽  
Better Than

New superior varieties (VUB) are a reliable technological innovation to increase rice productivity. This study aims to determine the yield potential of some lowland rice VUB. The assessment was carried out on land owned by a member of the Sumber Rejeki Farmer Group, Cintaratu Village, Lakbok District, Ciamis Regency at Dry Season II in June-September 2020. The study used a randomized complete block design (RCBD) with six varieties of treatment and was repeated ten times. The varieties tested were Inpari 32, Inpari 42, Padjadjaran, Cakrabuana, Inpari IR Nutrizinc, and Siliwangi varieties. The variables observed included the growth component, yield component, and yield component. Data were analyzed using the F test followedby the Duncan Multiple Range Test at the Q=5% level. In addition, a correlation test was conducted between the growth components, yield components, and yields. The results of the study indicated that the new superior rice varieties studied had different performance in growth, number of tillers, yield, and yield components. Inpari 42 variety produced the highest productivity, namely 6.88 ton ha-1 which was supported by the number of grains per panicle, percentage of filled grains per panicle, and percentage of empty grain per panicle which were better than other varieties. Plant height and number of grains per panicle were positively correlated with yield.

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