Increasing Grain Yield in Bread Wheat (Triticum aestivum L.) by Selection for High Spike Fertility Index

ABSTRACTSpike fertility index (SF; a.k.a. fruiting efficiency at maturity) has been proposed as a promising selection criterion for increasing grain yield (GY) in bread wheat. In this study, changes in GY and related traits after simulated selection (10% intensity) for high SF or high GY were assessed in (i) a RIL population of 90 individuals (Avalon/Glupro) (ii) a RIL population of 146 individuals (Baguette 10/Klein Chajá); (iii) 28-36 advanced lines from a breeding program. Grain yield, SF, grain number per unit area (GN), grain weight, test weight and grain protein content were determined. Regardless of the environmental conditions, simulated selection for high SF alone always resulted in GN increases (between 1.6 and 27.4%). Average GY increase observed after simulated selection for high SF (5.6%; N=20; S2 =80.1) did not differ (p=0.2) from the average GY increase observed after simulated selection for GY per se (12.9%; N=12; S2 =308.1). Our findings validate the use of SF as a selection criterion for increasing genetic progress of grain yield in bread wheat breeding programs.

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Selection for high spike fertility index increases genetic progress in grain yield and stability in bread wheat

Euphytica ◽

10.1007/s10681-018-2193-4 ◽

2018 ◽

Vol 214 (7) ◽

Cited By ~ 12

Author(s):

M. P. Alonso ◽

N. E. Mirabella ◽

J. S. Panelo ◽

M. G. Cendoya ◽

A. C. Pontaroli

Keyword(s):

Grain Yield ◽

Bread Wheat ◽

Genetic Progress ◽

Fertility Index ◽

Selection For

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HARVEST INDEX AS A SELECTION CRITERION FOR GRAIN YIELD IN TWO SPRING WHEAT CROSSES GROWN AT TWO POPULATION DENSITIES

Canadian Journal of Plant Science ◽

10.4141/cjps80-166 ◽

1980 ◽

Vol 60 (4) ◽

pp. 1141-1146 ◽

Cited By ~ 13

Author(s):

H. G. NASS

Keyword(s):

Population Density ◽

Grain Yield ◽

Spring Wheat ◽

Harvest Index ◽

Plant Density ◽

Selection Criterion ◽

Triticum Aestivum L ◽

Wheat Breeding ◽

Seeding Rate ◽

Population Densities

The use of harvest index as a selection criterion for grain yield in F2 populations of spring wheat (Triticum aestivum L.) grown at two population densities was investigated. Harvest index was useful in delineating yield differences between lines for both crosses. The F4 lines selected in F2 for a high harvest index yielded about 9% more per plot in 1978 than F4 lines having a low harvest index in F2. Generally, lines selected at the higher commercial seeding rate yielded more than lines selected at the lower plant density. In 1979, a heavy Fusarium infection reduced the mean grain yield of the F6 lines and suppressed any significant response to selection resulting from population density and harvest index in F2. While selection based on high harvest index at low population density can be used to select higher yielding plants it was not as effective as selection at high population density which more closely approximates commercial crop densities. Additional research is needed before the use of harvest index as a selection tool in wheat breeding programs can be recommended for use in Atlantic Canada.

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Selection for Grain Yield in Bread Wheat (Triticum aestivum L.) under Normal Irrigation and Water Stress Conditions

Assiut Journal of Agricultural Sciences ◽

10.21608/ajas.2020.104372 ◽

2020 ◽

Vol 51 (1) ◽

pp. 26-41

Keyword(s):

Triticum Aestivum ◽

Water Stress ◽

Grain Yield ◽

Bread Wheat ◽

Triticum Aestivum L ◽

Stress Conditions ◽

Selection For

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Selection for Grain Yield in Bread Wheat (Triticum aestivum L.) under Drought Stress

Egyptian Journal of Agronomy ◽

10.21608/agro.2014.73 ◽

2014 ◽

Vol 36 (2) ◽

pp. 189-203

Keyword(s):

Triticum Aestivum ◽

Drought Stress ◽

Grain Yield ◽

Bread Wheat ◽

Triticum Aestivum L ◽

Selection For

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Selection for Grain Yield in Bread Wheat (Triticum aestivum L.) Under Normal and Heat Stress Conditions

Assiut Journal of Agricultural Sciences ◽

10.21608/ajas.2013.731 ◽

2013 ◽

Vol 45 (2) ◽

pp. 1-18

Keyword(s):

Triticum Aestivum ◽

Heat Stress ◽

Grain Yield ◽

Bread Wheat ◽

Triticum Aestivum L ◽

Stress Conditions ◽

Selection For

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Selection Criteria and Selection Environment for Drought Tolerance of Egyptian Wheat (Triticum aestivum L.) Landraces

Annual Research & Review in Biology ◽

10.9734/arrb/2020/v35i230186 ◽

2020 ◽

pp. 25-40

Author(s):

Ahmed Medhat Mohamed Al-Naggar ◽

Mohamed Abd El-Maboud Abd El-Shafi ◽

Mohamed Helmy El-Shal ◽

Ali Hassan Anany

Keyword(s):

Drought Tolerance ◽

Grain Yield ◽

Selection Criteria ◽

Selection Criterion ◽

Correlation Coefficients ◽

Grain Filling ◽

Triticum Aestivum L ◽

Genetic Advance ◽

Selection Environment ◽

Selection For

Strong correlations between wheat traits and drought tolerance (DT) associated with high heritability and high genetic advance from selection would allow plant breeder to use such traits as selection criteria. The objective of the present investigation was to determine the optimum selection criteria and selection environment for drought tolerance via estimation of correlation coefficients (r) among 13 agronomic, grain yield and quality traits and DT of 20 wheat landraces, broad-sense heritability (h2b) and genetic advance (GA) from selection for such traits under well-watered (WW) and water stressed (WS) environments. A two-year experiment was carried out using a split-plot design with four replications. Results concluded that the best selection criterion for drought tolerance in our study was grain yield/plant (GYPP), followed by a number of grains/spike (GPS), grain filling period (GFP), grain starch (GSC) and protein (GPC) content, plant height (PH) and days to maturity (DTM), since they showed high (r), high h2b and high GA estimates. The best selection environment was WW for days to anthesis, PH, spikes/plant, GPS, spikelets/spike, GYPP, GPC and WS for DTM, GFP, GSC and thousand-grain weight traits. This information could help future breeding programs in selection for improving drought tolerance of wheat.

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Correlation and path coefficient analysis for yield and its attributing traits in bread wheat (Triticum aestivum L. em Thell)

Journal of Applied and Natural Science ◽

10.31018/jans.v10i4.1867 ◽

2018 ◽

Vol 10 (4) ◽

pp. 1078-1084 ◽

Cited By ~ 2

Author(s):

Tabassum Ahmad ◽

Anil Kumar ◽

Deepanker Pandey ◽

Birendra Prasad

Keyword(s):

Grain Yield ◽

Bread Wheat ◽

Block Design ◽

Selection Criterion ◽

Triticum Aestivum L ◽

Spike Length ◽

Path Coefficient ◽

Path Coefficient Analysis ◽

Biological Yield ◽

Positive Direct

Grain yield is a complex quantitative trait and influenced by a number of attributes. To obtain higher yield information regarding association of these attributes with yield can serve as a basis in a breeding programme. The present experiment was undertaken to estimate correlation coefficients between grain yield and different contributing characters and divide this association into direct and indirect effects through path coefficient analysis. The experiment was laid-out with three replications in randomized block design using 51 bread wheat genotypes and data were recorded for fourteen metric traits. Results revealed that grain yield per plant possessed highly significant positive associations with biological yield per plant (0.787 and 0.606), number of spikelets per spike (0.565 and 0.358), number of tillers per plant (0.500 and 0.383) and spike length (0.320 and 0.297) at both genotypic as well as phenotypic level respectively. Biological yield per plant (1.125) exhibited highest positive direct effect on grain yield followed by harvest index (0.678), number of spikelets per spike (0.109), days to maturity (0.100) and spike length (0.060). Therefore, these characters can serve as a selection criterion for further improvement in grain yield of wheat.

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Identification of heterotic cross combinations for various agromorphological and some quality traits in bread wheat (Triticum aestivum L.)

Journal of Applied and Natural Science ◽

10.31018/jans.v9i4.1481 ◽

2017 ◽

Vol 9 (4) ◽

pp. 2013-2020

Author(s):

Sandeep Kumar ◽

Pradeep Kumar ◽

Vichitra Kumar Arya ◽

Ravi Kumar ◽

Gaurav Kamboj ◽

...

Keyword(s):

Grain Yield ◽

Bread Wheat ◽

Flag Leaf ◽

Triticum Aestivum L ◽

Wheat Breeding ◽

Quality Traits ◽

Cross Combination ◽

Biological Yield ◽

Transgressive Segregants ◽

Standard Heterosis

A study was conducted to identify the best heterotic cross for various agromorphological and some quality traits involving 10 parents and their 45 F1s excluding reciprocals during 2012-13 and 2013-14. The higher magnitude of heterosis for all the agromorphological and quality traits was not expressed in a single cross combination. It varied from cross to cross due to diverse genetic background of their parents. The highest heterobeltiosis (35.68%, 11.11%, 11.44%), average heterosis (38.97%, 9.13%, 10.26%) and standard heterosis (31.09%, 7.84%, 10.41%) for grain yield, spikelets per spike and grains per spike respectively, was showed by HD 3095 x RAJ 4246 and this cross also showed highly significant (at <1% level of significant) heterosis for biological yield, flag leaf area, spike length and productive tillers. Whereas PBW 435 x RAJ 4246 were common for gluten content (8.52% and 7.72%), grain yield (33.11% and 33.64%), productive tillers (16.15% and 13.53%) and biological yield (36.27% and 21.98%) which showed superior average heterosis and heterobeltiosis respectively, therefore, these crosses may be exploit-ed in a national hybrid wheat breeding programme may offer genetic improvement in breeding for higher grain yield, agromorphological and quality traits in bread wheat. The presence of high heterosis for yield contributing compo-nents is not only for developing hybrids through exploitation of heterosis but also helps to produce transgressive segregants for developing of superior homozygous lines.

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