Effect of Selection for Emergence and Maturity on Yield of Ontario Peanuts

1988 ◽  
Vol 15 (2) ◽  
pp. 69-72 ◽  
Author(s):  
T. E. Michaels
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Mature Seed ◽  
Early Maturity ◽  
Growing Seasons ◽  
Region Selection ◽  
Arachis Hypogaea L ◽  
Selection For ◽  
Mature Seeds ◽  
High Seed Yield

Abstract Seed yield of Valencia peanut (Arachis hypogaea L. ssp. fastigiata Waldron var. fastigiata) cultivars currently grown in Ontario. Canada appears quite sensitive to cooler or shorter than normal growing seasons. High seed yield may be associated with high percentage emergence and early maturity in this unique peanut-growing region. Selection for percentage emergence and maturity was practiced among F2 derived F4 families of five populations. Maturity was determined by percentage of pod yield as sound mature seeds Percentage emergence selections and percentage sound mature seed selections were recombined in a Comstock and Robinson design II mating design to develop 16 crosses. F3 and F4 bulk progeny of these Crosses were entered in three trials in two locations. Crosses on average had significantly higher percentage emergence and percentage sound mature seeds than the ancestors at only the coolest, shortest season location. Crosses on average were not significantly different from ancestors for pod or seed yield in any trial. General combining ability (GCA) and its interaction with trial were Significant for all characteristics except percentage emergence for the percentage sound mature seed selections. The GCA x trial interactions appeared to be associated with differences in rainfall and temperature in August and September between the two years. Specific combining ability and its interaction with trial were also significant for all characteristics except emergence.

scholarly journals Combining ability × environment interaction and genetic analysis for agronomic traits in safflower (Carthamus tinctorius L.): biplot as a tool for diallel data

2017 ◽  
Vol 109 (2) ◽  
pp. 229 ◽  
Author(s):  
Pooran Golkar ◽  
Ehsan Shahbazi ◽  
Mojtaba Nouraein
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Agronomic Traits ◽  
Carthamus Tinctorius ◽  
Environment Interaction ◽  
Geographical Regions ◽  
Selection For ◽  
Half Diallel ◽  
High Seed Yield

Combining ability × environment interaction is considerable to identify the effect of environment on the combining ability and gene action of the traits to select appropriate parents for safflower hybrid production. The 36 genotype (28 F<sub>2</sub> progenies of eight-parent half-diallel crosses across 8 parental genotypes) of safflower were studied to investigate the mentioned parameters across different geographical regions of Iran. The results indicated significant differences among parents for general and specific combining ability, except for seeds per capitulum across three environments. The overall results indicated that K<sub>21</sub> and Mex.22-191 were excellent parents with greater general combining ability for the improvement of seed yield in safflower. The K<sub>21</sub> × Mex.22-191 hybrid could be, therefore, employed for the production of high seed yield in safflower breeding. The estimates of genetic variance components recommended the importance of additive- dominance genetic effects that contributed to variation in yield per plant. Such gene action expression for seed yield <a href="https://www.google.com/search?espv=2&amp;biw=1024&amp;bih=667&amp;q=define+appetite&amp;sa=X&amp;ved=0ahUKEwiT-vT4n6TMAhXoIpoKHRKqAWQQ_SoIOTAA">needs</a> auxiliary methods based on hybridization and selection for seed yield advancement in safflower.

scholarly journals Genetic Parameters for Determining Useful Parents in Mungbean (Vigna radiata (L.) Wilczek) Breeding for Early Maturity, Small Seed Size, and High Seed Yield

Scientifica ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Trustinah ◽  
Rudi Iswanto ◽  
Ratri T. Hapsari ◽  
Novita Nugrahaeni ◽  
Rudy Soehendi ◽  
...  
Keyword(s):  
Seed Size ◽  
Seed Yield ◽  
Combining Ability ◽  
Seed Weight ◽  
Genetic Parameters ◽  
Early Maturity ◽  
Small Seed ◽  
100 Seed Weight ◽  
High Seed Yield ◽  
Number Of Branches

Early maturity, small seed size, and high seed yield are important characters of mungbean in Indonesia. The objective of the study was to determine the useful parents in mungbean crosses for early maturity, small seed size, and high seed yield varieties by estimating the genetic parameters and their inheritance. The study was conducted at the ILETRI, Malang, East Java, Indonesia, during the dry season of 2014. 20 F1 and 5 parents were evaluated using a randomized block design, repeated three times. Results of the study showed that all observed traits showed the importance of both additive and dominance gene effects. The relative value of general combining ability (GCA) was greater than specific combining ability (SCA) for number of pod clusters per plant, number of branches per plant, plant height, days to maturity, and 100-seed weight which indicated the importance of additive gene effect. The dominance gene effect occurred on number of pods and seed yield per plant. Among five parents, G3 was the best combiner for all the observed characters except pod length; therefore, G3 could be exploited for late maturity, small seed size, high number of branches and pod cluster, and high seed yield. G5 has a high GCA for 100-seed weight. G1 and G2 have good GCA for early maturity. G3 and G5 genotypes are useful as parents in mungbean breeding for small and large seed size varieties, respectively. The best combination for seed yield was G2 × G3 and G3 × G1 crosses and could be proceeded with selection for early maturity, small seed size, and high seed yield varieties.

Relations of carbon isotope discrimination and other physiological traits to yield in common bean (Phaseolus vulgaris) under rainfed conditions

1994 ◽  
Vol 122 (2) ◽  
pp. 275-284 ◽  
Author(s):  
J. W. White ◽  
J. A. Castillo ◽  
J. R. Ehleringer ◽  
J. A. C. Garcia ◽  
S. P. Singh
Keyword(s):  
Phaseolus Vulgaris ◽  
Carbon Isotope ◽  
Water Deficit ◽  
Seed Yield ◽  
Combining Ability ◽  
Carbon Isotope Discrimination ◽  
Isotope Discrimination ◽  
Rainfed Conditions ◽  
Mechanisms Of Adaptation ◽  
Selection For

SUMMARYAlthough direct selection for seed yield under water deficit can result in genetic gains in the common bean (Phaseolus vulgaris L.), progress could be enhanced through selection for additional traits that are related to underlying mechanisms of adaptation to water deficit. Carbon isotope discrimination (Δ) has received considerable attention as an indicator of water use efficiency and adaptation to water deficit. To test the utility of Δ as a selection criterion, Δ and other traits were measured in F2 and F3 generations of a nine-parent diallel grown under rainfed conditions at two locations in Colombia with contrasting soil types. An irrigated trial was also conducted at one location. Significant (P 0·05) differences among parents, F2 and F3 were found for carbon isotope discrimination (Δ), leaf optical density (OD), leaf nitrogen (N) and potassium (K) concentrations, relative duration of pod-filling period (RDPF), shoot dry weight (SDW) and harvest index (HI). Effect of location and water regime and their interactions with genotype were also frequently significant. Heritability estimates, determined by regressing the F3 on the F2, ranged from 0·11±011 (S.E.) to 0·33 ±0·10 for OD, 0·22 ± 0·07 to 0·44±0·09 for N, 0·04±0·05 to 0·29±0·08 for K, 0·40 ± 0·08 to 0·43 ± 0·15 for RDPF and 0·30±0·22 to 1·00±0·24 for SDW. All values for Δ and HI did not differ significantly from zero. Correlations between seed yield and OD and RDPF were negative, whereas those with N, K, SDW, and HI were positive. For all traits, mean square values for general combining ability (GCA) were usuall significant and larger than those for specific combining ability (SCA). All significant GCA effects for Δ for ‘Rio Tibagi’, ‘San Cristobal 83’ and ‘Apetito’ were negative, while those for ‘Bayo Rio Grande’, ‘Bayo Criollo del Llano’, ‘Durango 222’ and BAT1224 were positive. Although Δappears unsuitable as an indirect criterion for selection for yield under water deficit, further study of genotypes exhibiting contrasting values of A might reveal differences in mechanisms of adaptation to water deficits, thus leading to other selection criteria or identification of valuable parental lines.

Combining Ability and Gene Action Analysis for Seed Yield and Component Traits in F2 Generation of Vigna mungo L. Hepper by using Griffing Approach

2020 ◽  
Author(s):  
Amandeep Singh ◽  
R. K. Mittal ◽  
V. K. Sood ◽  
Kulveer Singh Dhillon ◽  
Shailja Sharma
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Gene Action ◽  
Block Design ◽  
Crop Improvement ◽  
Gene Effects ◽  
Early Maturity ◽  
Plant Seed ◽  
Combining Abilities ◽  
Half Diallel

Background: Urdbean (2n=2x=22), also known as blackgram is an important short duration legume crop belonging to family Fabaceae, widely cultivated in Asia. Urdbean occupies an important position among pulses owing to its high seed protein (25-26%), carbohydrates (60%), fat (15%), minerals, amino acids and vitamins. Owing to its low water requirement, it is also suitable for rainfed conditions. It adapts well to various cropping systems owing to its ability to fix atmospheric nitrogen in symbiosis with soil bacteria, rapid growth and early maturity. Half diallel analysis was adopted in present study to gather information on gca (general combining abilities) and sca (specific combining abilities) of 6 diverse parents and simultaneously estimating various types of gene effects involved in the expression of seed yield and related attributes in urdbean. Methods: The F1’s were developed during 2017 in 9 x 9 half diallel fashion by Sharma et al. 2019 and these F1’s were evaluated. Significant crosses on the basis of gene action and combining ability were selected for further advancement. The experimental material comprised of the six parents and 15 F2’s of a 6 x 6 half diallel cross among six cultivars of urdbean (four are purelines viz., Palampur-93, HPBU-111, DU-1 and KU-553 and rest of the two are advanced and indigenous lines viz., Him Mash-1 and IC-281994). The F2’s along with the parental genotypes were grown in a Randomized block Design (RBD) with three replications at Experimental Farm of the Department of Crop Improvement, COA, CSK HPKV Palampur (H.P.) during Kharif, 2018. Results: The cross combination, Him Mash-1× HPBU-111, was identified the best for high seed yield on the basis of sca. The specific crosses, Palampur-93 × IC-281994, Palampur-93 × KU-553 were good specific combiners for most of the traits viz., plant height, branches per plant, pods per plant, biological yield per plant, seed yield per plant, harvest index, 100-seed weight and crude protein content.

scholarly journals Line × tester analysis in rapeseed: Identification of superior parents and combinations for seed yield and its components

2016 ◽  
Vol 70 (2) ◽  
pp. 69
Author(s):  
Valiollah Rameeh
Keyword(s):  
Genetic Variation ◽  
Seed Yield ◽  
Combining Ability ◽  
Mean Value ◽  
Narrow Sense Heritability ◽  
Early Maturity ◽  
Mean Values ◽  
Significant Variance ◽  
Additive Genetic Effects ◽  
Number Of Branches

<p>This research was carried out to investigate the genetic structure of the 20 F1s rapeseed hybrids established from five female moderate maturity lines and four early maturity male testers, to determine parents showing general combining ability (GCA) and detect crosses showing specific combining ability (SCA). Significant variance of parents and crosses for all the traits indicated the existence of significant genetic variation among the parents and their F1 cross combinations. Significant variance of parents <em>vs. </em>crosses revealed significant average heterosis for all the traits except first pod height and seeds per pod. High narrow-sense heritability estimates for number of branches and pods length, indicate the importance of additive genetic effects for these traits. Hybrid performance was generally better than parental performance for all the traits except number of branches and also the genetic variation of lines × testers for all the traits were more than lines and testers. Most of the crosses with high mean value of pods per plant were yielded from the parental lines with high mean value of this trait. The crosses including L41×Foma2, Zafar×R42 and L22B×R38 with significant positive SCA effects of seed yield had also high mean values (3400, 3311.3 and 2904.2 kg ha-1 , respectively) of this trait.</p>

WESTAR SUMMER RAPE

1987 ◽  
Vol 67 (2) ◽  
pp. 491-493 ◽  
Author(s):  
A. J. KLASSEN ◽  
R. K. DOWNEY ◽  
J. J. CAPCARA
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Oil Content ◽  
Western Canada ◽  
Agronomic Performance ◽  
Brassica Napus L ◽  
Early Maturity ◽  
Cultivar Description ◽  
Canola Quality ◽  
High Seed Yield

Westar summer rape (Brassica napus L.), licensed in 1982, is a canola-quality cultivar that combines high seed yield with high oil content and early maturity. Westar is adapted to the B. napus growing areas of western Canada and because of its superior agronomic performance has replaced the older cultivars Regent, Andor and Altex.Key words: Rape (summer), cultivar description

CUTLASS ORIENTAL MUSTARD

1989 ◽  
Vol 69 (1) ◽  
pp. 249-250
Author(s):  
D. L. WOODS
Keyword(s):  
Brassica Juncea ◽  
Seed Yield ◽  
Oil Content ◽  
Western Canada ◽  
Early Maturity ◽  
Oriental Mustard ◽  
High Seed Yield

Cutlass oriental mustard (Brassica juncea (L.) Coss), licenced in 1985, is a pure-yellow-seeded cultivar which combines a high glucosinolate level with high seed yield, reduced oil content and early maturity. It is adapted to all areas of western Canada where B. juncea is grown.Key words: Mustard (oriental), Cutlass cultivar

Effectiveness of Stratified Mass Selection for Yield in Intrasubspecific and Intersubspecific Crosses of Peanut1

1986 ◽  
Vol 13 (1) ◽  
pp. 33-35 ◽  
Author(s):  
R. N. Holley ◽  
J. C. Wynne
Keyword(s):  
Seed Yield ◽  
Mass Selection ◽  
Plant Introductions ◽  
Meat Content ◽  
Genetic Base ◽  
Arachis Hypogaea L ◽  
Effective Selection ◽  
Selection For ◽  
F2 Generation ◽  
Bulk Breeding

Abstract Methods of broadening the genetic base of the peanut (Arachis hypogaea L.) generally involve crosses of exotic germplasm with locally adapted cultivars. Broadening the genetic base effectively requires the evaluation of a large number of crosses and lines within crosses. Mass selection within a cross in early generation, as opposed to single seed descent or bulk breeding methods, eliminates many undesirable segregates from crosses of exotic with adapted germplasm. In this study five plant introductions, representing different levels of diversity, were crossed with an adapted Virginia (ssp. hypogaea var. hypogaea) breeding line. Twelve high and 12 low yielding plants in the F2 generation of each cross were selected with a high and low selection being made from among 10 plants grown in sixteen 12-plant rows. The selected material was increased and evaluated in F4 generation yield trials at two locations. Stratified mass selection for higher seed yield was effective for both intersubspecific crosses but was only effective for one of the three intrasubspecific crosses. Confounding effects of meat content with seed yield and the small number of F2 plants evaluated may be partially responsible for the lack of effective selection for two of the intrasubspecific crosses. Selection for higher seed yield separated the F2 plants into two groups for meat content with the selections for high seed yield having higher meat content. However, the high and low selections, when evaluated in the F4 generation, were not different for meat content except for one intrasubspecific cross.

scholarly journals Adaptation of Lentil to the Mediterranean Environment. I. Factors Affecting Yield Under Drought Conditions

1993 ◽  
Vol 29 (1) ◽  
pp. 9-19 ◽  
Author(s):  
S. N. Silim ◽  
M. C. Saxena ◽  
W. Erskine
Keyword(s):  
Drought Stress ◽  
Flowering Time ◽  
Seed Yield ◽  
Ground Cover ◽  
Farming Systems ◽  
Yield Potential ◽  
Mediterranean Environment ◽  
Early Maturity ◽  
Selection For ◽  
Seed Yields

SummaryLentil frequently suffers from drought stress towards the end of the growing season in rainfed Mediterranean farming systems. This study aimed to quantify the contribution of yield potential under irrigated conditions and of drought escape to the adaptation of lentils to drought, and to identify traits of value in selection for adaptation to a rain-fed Mediterranean environment. Twenty-five diverse lentil lines were sown under both irrigated and rainfed conditions in the 1987/88 and 1988/89 seasons in northern Syria. In 1987/88 the total seasonal rainfall was 403 mm and average rainfed biomass and seed yields were 5.0 and 1.8 t ha-l, respectively. In contrast, in 1988/89 the total season rainfall was 180 mm and average biomass and seed yields were only 0.67 and 0.12 t ha-1, respectively. Early vigour (estimated as a visual score) and percentage ground cover were strongly associated with final biomass, and were of value in predicting economic yield (seed + straw). Early maturity was correlated with seed yield. In the dry season 1988/89, 49% of the variation in seed yield among lines was accounted for by variation in flowering time. Drought escape was clearly the key response to drought. For severely drought-prone areas, selection for early flowering is therefore required. Variation in flowering time and seed yield under irrigated conditions accounted for 62% of seed yield variation under drought stress.

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