Selection indices using plant type characteristics in Navy beans (Phaseolus vulgaris L.)

1977 ◽  
Vol 89 (2) ◽  
pp. 341-348 ◽  
Author(s):  
J. H. C. Davis ◽  
Alice M. Evans
Keyword(s):  
Yield Components ◽  
Selection Index ◽  
Yield Component ◽  
Plant Type ◽  
Seed Shape ◽  
Navy Bean ◽  
Early Maturity ◽  
Strong Base ◽  
Simultaneous Selection ◽  
Efficiency Of Selection

SummaryA replicated trial of 18 families of Navy-bean breeding lines in the F4 generation was grown at Cambridge. The selection-index technique was used to investigate means of improving the efficiency of simultaneous selection for four criteria, namely yield, seed shape (numerical scores from ‘good’ to ‘poor’), early maturity and increased height of pod tips. Relative economic weights were chosen. The yield components and a range of characters describing plant type were measured making 15 characters in all, and combinations of these were included in 32 indices.It was predicted that simultaneous selection would be limited by adverse correlations between some of the four selection criteria, especially early maturity and height. The estimated efficiency of selection would hardly be improved by including information on the yield components. Combinations of the plant type characters, on the other hand, were predicted to provide considerable additional advance amounting to a 10% improvement when information on total number of nodes and inflorescences and hypocotyl diameter was included.It was concluded that the time involved in collecting yield component data would be better spent collecting information on a limited number of plant type characteristics in future trials, and that an ideal plant was one with reduced branching and a few heavily podded inflorescences borne on a tall plant with a strong base.

scholarly journals Analysis of Direct and Indirect Selection and Indices in Bread Wheat (Triticum aestivum L.) Segregating Progeny

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Zine El Abidine Fellahi ◽  
Abderrahmane Hannachi ◽  
Hamenna Bouzerzour
Keyword(s):  
Bread Wheat ◽  
Yield Components ◽  
Selection Criteria ◽  
Flag Leaf ◽  
Selection Index ◽  
Triticum Aestivum L ◽  
Indirect Selection ◽  
Selection Methods ◽  
Simultaneous Selection ◽  
Selection Of

Three selection methods including direct and indirect selection along with selection index based on the phenotypic values of eleven traits of agronomic interest were assessed for their application in F4 bread wheat progenies. Significant genetic variation existed among parents and crosses for the traits measured. The following were the most efficient indices for simultaneous selection of superior lines for yield and its components: base index of Williams, followed by the sum of ranks index of Smith and Hazel. The selection-based index provided the highest grain yield gains as compared to the other selection criteria, except for flag leaf area, indicating that the direct and indirect monotrait selection were not appropriate in the situation analyzed in this work. PCA identified Ain Abid × Mahon-Demias, Ain Abid × Rmada, and Ain Abid × El-Wifak as the most promising populations. At 5% selection intensity, the top 30 lines selected were distinguished, in comparison with the standard check Hidhab, by significant improvements in yield and yield components.

scholarly journals Simultaneous Selection of Sweet-Waxy Corn Ideotypes Appealing to Hybrid Seed Producers, Growers, and Consumers in Thailand

Agronomy ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 87
Author(s):  
Abil Dermail ◽  
Aphakorn Fuengtee ◽  
Kamol Lertrat ◽  
Willy Bayuardi Suwarno ◽  
Thomas Lübberstedt ◽  
...  
Keyword(s):  
Block Design ◽  
Selection Index ◽  
F1 Hybrids ◽  
Eating Quality ◽  
Blind Test ◽  
Early Maturity ◽  
Simultaneous Selection ◽  
Waxy Corn ◽  
Corn Hybrid ◽  
Selection Of

Multi-trait selection helps breeders identify genotypes that appeal to divergent groups of preferences. In this study, we performed simultaneous selection of sweet-waxy corn hybrids on several traits covering the perspectives of consumers (taller kernel depth, better eating quality), growers (early maturity, shorter plant stature, and high ear yield), and seed producers (high flowering synchrony, acceptable seed yield, and good plant architecture). Three supersweet corn lines and 8 waxy corn lines were intercrossed to generate 48 F1 hybrids according to North Carolina Design II, and these genotypes were laid out in a randomized complete block design with 3 replications across 2 seasons between 2017 and 2018. A sensory blind test on sweetness, stickiness, tenderness, and overall liking was conducted to assess the eating quality of steamed corn samples. Two methods of simultaneous selection, namely unweighted selection index and overall rank-sum index (ORSI), were applied to rank crosses, following all targeted groups of preferences. Genetic parameters and genetic gain were estimated to evaluate the effectiveness of those selection methods. Both approaches had similar patterns of preferable realized gain on each given trait and could identify similar top five crosses with only slight order changes, implying that these methods were effective to rank genotypes according to given selection criteria. One of the tested crosses, 101L/TSC-10 × KV/mon, consistently had the highest unweighted selection index in the dry (7.84) and the rainy (7.15) seasons and the lowest ORSI (310), becoming a promising candidate as synergistic sweet-waxy corn hybrid appealing to consumers, growers, and seed producers. The expected ideotypes of sweet-waxy corn hybrid are discussed.

AC Compass navy bean

2000 ◽  
Vol 80 (2) ◽  
pp. 341-342 ◽  
Author(s):  
S. J. Park ◽  
T. Rupert
Keyword(s):  
Phaseolus Vulgaris ◽  
Yield Potential ◽  
High Yield ◽  
Research Centre ◽  
Plant Type ◽  
Navy Bean ◽  
Early Maturity ◽  
Cultivar Description ◽  
Canadian Food Inspection Agency ◽  
High Yield Potential

AC Compass navy bean (Phaseolus vulgaris L.) was developed at the Agriculture and Agri-Food Canada Greenhouse and Processing Crops Research Centre (GPCRC), Harrow, Ontario. It has high yield potential, erect plant type and medium-early maturity in southwestern Ontario where it is recommended for areas with 2600 or higher CHU. It was registered by the Canadian Food Inspection Agency (Registration no. 4708) on 11 March 1998. Key words: Phaseolus vulgaris, navy bean, cultivar description, plant type

AC Cruiser common bean

2003 ◽  
Vol 83 (2) ◽  
pp. 385-386 ◽  
Author(s):  
S. J. Park ◽  
T. Rupert
Keyword(s):  
Phaseolus Vulgaris ◽  
Yield Potential ◽  
Research Centre ◽  
Plant Type ◽  
Navy Bean ◽  
Early Maturity ◽  
Cultivar Description ◽  
Canadian Food Inspection Agency ◽  
Determinate Growth ◽  
Determinate Growth Habit

AC Cruiser navy bean (Phaseolus vulgaris L.) was developed at the Agriculture and Agri-Food Canada Greenhouse and Processing Crops Research Centre (GPCRC), Harrow, Ontario. It has good yield potential and a semi-determinate growth habit with a very up right plant type and medium-early maturity. The cultivar is recommended for areas in southwestern Ontario with 2650 or higher crop heat units. It has a low level of resistance to common bacterial blight. AC Cruiser was registered by the Canadian Food Inspection Agency Variety Registration Office (Registration no. 5360) on September 21, 2001. Key words: Phaseolus vulgaris, navy bean, cultivar description, plant type

Effects of Mechanized Planting Methods on Yield Components and Plant Type Characteristics ofIndicaHybrid Rice Fyou 498

2014 ◽  
Vol 40 (4) ◽  
pp. 719 ◽  
Author(s):  
Xiao-Long LEI ◽  
Li LIU ◽  
Bo LIU ◽  
Guang-Zhong HUANG ◽  
Xiang GUO ◽  
...  
Keyword(s):  
Yield Components ◽  
Plant Type ◽  
Planting Methods

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 Irrigation and Nitrogen Fertilization on Seed Yield, Yield Components, and Water Use Efficiency of Cleistogenes songorica

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 466
Author(s):  
Qibo Tao ◽  
Mengjie Bai ◽  
Cunzhi Jia ◽  
Yunhua Han ◽  
Yanrong Wang
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Seed Yield ◽  
Yield Components ◽  
Perennial Grass ◽  
Yield Component ◽  
Path Coefficient ◽  
Grass Seed ◽  
Significant Difference ◽  
Use Efficiency

Irrigation and nitrogen (N) are two crucial factors affecting perennial grass seed production. To investigate the effects of irrigation and N rate on seed yield (SY), yield components, and water use efficiency (WUE) of Cleistogenes songorica (Roshevitz) Ohwi, an ecologically significant perennial grass, a four-year (2016–2019) field trial was conducted in an arid region of northwestern China. Two irrigation regimes (I1 treatment: irrigation at tillering stage; I2 treatment: irrigation at tillering, spikelet initiation, and early flowering stages) and four N rates (0, 60, 120, 180 kg ha−1) were arranged. Increasing amounts of both irrigation and N improved SY, evapotranspiration, WUE, and related yield components like fertile tillers m−2 (FTSM) and seeds spikelet−1. Meanwhile, no significant difference was observed between 120 and 180 kg N ha−1 treatments for most variables. The highest SY and WUE was obtained with treatment combination of I2 plus 120 kg N ha−1 with four-year average values of 507.3 kg ha−1 and 1.8 kg ha−1 mm−1, respectively. Path coefficient and contribution analysis indicated that FTSM was the most important yield component for SY, with direct path coefficient and contribution coefficient of 0.626 and 0.592. Overall, we recommend I2 treatment (three irrigations) together with 120 kg N ha−1 to both increase SY and WUE, especially in arid regions. Future agronomic managements and breeding programs for seed should mainly focus on FTSM. This study will enable grass seed producers, plant breeders, and government program directors to more effectively target higher SY of C. songorica.

Comparison of yield components and plant type characteristics of high-yield rice between Taoyuan, a ‘special eco-site’ and Nanjing, China

2009 ◽  
Vol 112 (2-3) ◽  
pp. 214-221 ◽  
Author(s):  
Ganghua Li ◽  
Lihong Xue ◽  
Wei Gu ◽  
Congdang Yang ◽  
Shaohua Wang ◽  
...  
Keyword(s):  
Yield Components ◽  
High Yield ◽  
Plant Type
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