Mass selection of fonio landraces ( Digitaria exilis ) grown in Benin: Pathway, homogeneity assessment and genotypes screening

2020 ◽  
Vol 139 (6) ◽  
pp. 1266-1280
Author(s):  
Cyrille Kanlindogbè ◽  
Emmanuel Sekloka ◽  
Enoch Achigan‐Dako ◽  
Emmanuel Kwon‐Ndung
Keyword(s):  
Mass Selection ◽  
Homogeneity Assessment ◽  
Selection Of ◽  
Digitaria Exilis

Mass selection of neutral clusters in Low‐Energy Cluster Beam Deposition experiments: Is it realistic?

1994 ◽  
Vol 64 (10) ◽  
pp. 1212-1214 ◽  
Author(s):  
J. F. Roux ◽  
B. Cabaud ◽  
G. Fuchs ◽  
D. Guillot ◽  
A. Hoareau ◽  
...  
Keyword(s):  
Low Energy ◽  
Mass Selection ◽  
Cluster Beam ◽  
Cluster Beam Deposition ◽  
Energy Cluster ◽  
Selection Of ◽  
Beam Deposition

Mass selection of walnut rootstocks using response surface methods to correct for environmental trends

Euphytica ◽  
1990 ◽  
Vol 46 (3) ◽  
pp. 227-235
Author(s):  
S. A. Weinbaum ◽  
D. V. Shaw ◽  
R. Azari ◽  
T. T. Muraoka
Keyword(s):  
Response Surface ◽  
Mass Selection ◽  
Response Surface Methods ◽  
Selection Of

scholarly journals Selectivity of herbicides in the post-emergence sugarcane seedlings in primary selection fields

2019 ◽  
pp. 1232-1235
Author(s):  
Tácio Peres Silva ◽  
Amanda Mendes de Moura ◽  
Bruno Manoel Rezende de Melo ◽  
Douglas Goulart Castro ◽  
Laís Moretti Tomé ◽  
...  
Keyword(s):  
Sandy Soils ◽  
Mass Selection ◽  
Selective Action ◽  
Herbicide Treatments ◽  
Primary Selection ◽  
Establishment Phase ◽  
Final Selection ◽  
Selection Of

The hypothesis here proposed is that, in primary fields of mass selection (F1) of sugarcane, herbicides exert a selective action when applied in the early post-emergence of seedlings (POST-i) and supplemented after their establishment phase (POST-l) even in sandy soils. To verify such hypothesis, the selectivity of herbicides was studied on seedlings of three sugarcane families, after their application both at early and late post-emergence in primary selection fields (F1). The field had a randomized blocks design, with five replications, and the subdivided plots scheme was used. Twelve herbicide treatments were allocated in the plots (27 m-2), whereas the sub-plots (9 m-2) contained three families of seedlings. Each sub-plot consisted of a transplanted row (0.5 x 1.50 m) with 12 individuals of the same family. Six treatments were employed, namely, T1: tebuthiuron (1200 g ha-1) post-i + ametryn (3000 g ha-1) post-l; T2: diuron (1404 g ha-1) + hexazinone (396 g ha-1) post-i + ametryn (3000 g ha-1) post-l; T3: sulfentrazone (800 g ha-1) post-i + ametryn (3000 g ha-1) post-l; T4: diuron (1404 g ha-1) + hexazinone (396 g ha-1) post-i + metribuzin (1920 g ha-1) post-l; T5: sulfentrazone (800 g ha-1) post-i + metribuzin (1920 g ha-1) post-l, and T6: weeded plot. The sugarcane families were: F400 (♀IAC086155 x ♂unknown), F43 (♀IACBIO264 × ♂IAC911099), and F14 (♀IACSP991305 × ♂GlagaH). We concluded that the herbicides tebuthiuron (1200 g ha-1), diuron (104 g ha-1) + hexazinone (396 g ha-1), or sulfentrazone (800 g ha-1), when applied in the early post-emergence and supplemented with ametryn (3000 g ha-1) or metribuzin (1920 g ha-1) in late post-emergence (60 days from planting) of the sugarcane families studied, were selective to the seedlings. That is, no toxicity symptoms with a potential to impede the final selection of seedlings occurred.

Improving the Quality of a Groundnut Population in Zambia by Bulk Selection of Seed

1974 ◽  
Vol 10 (3) ◽  
pp. 185-192 ◽  
Author(s):  
R. L. Thomas ◽  
A. J. Prior ◽  
J. E. Grafius
Keyword(s):  
Seed Size ◽  
Total Yield ◽  
Substantial Improvement ◽  
Mass Selection ◽  
Large Seed ◽  
Mean Size ◽  
Pedigree Selection ◽  
Positive Correlations ◽  
Selection Of

SUMMARYSubstantial improvement is reported in a quality measure, large seed size, after only one generation of mass selection from a bulk ‘Chalimbana’ population of Zambian land races of the inbred species Arachis hypogaea L. There were large positive correlations between seed size as planted and the subsequent mean size harvested. Large seed also tended to produce an increased proportion of 2- rather than 3-seeded pods, further improving both crop uniformity and quality. Total yield was unaffected, or possibly even slightly enhanced, by planting larger kernels. The circumstantial advantages of mass as opposed to pedigree selection methods are discussed.

SELECTION OF BLACK-AND-WHITE MOTLEY BREED OF CATTLE USING DIFFERENT METHODS OF BREEDING SELECTION

2016 ◽  
Vol 1 (1) ◽  
pp. 37-40
Author(s):  
Любимов ◽  
Aleksandr Lyubimov ◽  
Юдин ◽  
Vitaliy Yudin ◽  
Никитин ◽  
...  
Keyword(s):  
Conventional Wisdom ◽  
Positive Development ◽  
Mass Selection ◽  
Black And White ◽  
Related Pair ◽  
Udmurt Republic ◽  
Line Selection ◽  
Breeding Selection ◽  
Selection Of

The purpose of research is improving the efficiency of the breeding process with the planned inbreeding. Based on the works of Russian and foreign authors it is necessary to more closely approach the implementation of this method in practice. Many farms in the breeding of cattle meets application-related selection, often this phenomenon is spontaneous mean mass selection without studying the ancestry of individual animals or the proper documentation for the selection of the herd, and sometimes livestock-breeders deliberately form a related pair, despite the fact that in the literature there is still no clear conventional wisdom about the dangers of inbreeding or positive development. To properly assess the effectiveness of inbreeding it should be primarily studied the results of the use of inbred animals. The studies were conducted in a herd of Black-Motley breed cattle AIC «LUCH» Vavozhsky District of Udmurt Republic. The material for the study were pedigree card form 2-MOL, the data records, zootechnical and breeding records. Among outbreed animals were selected animals obtained by using the in-line selection and cross- line one. Inbreed individuals were classified depending on the degree and type of inbreeding. Cows resulting from the use of inbreeding, outbreeding outperform their half relative by yield of milk at 187.1 kg (3.5%). Between the calving, the longest period was detected in the group of cows resulting moderate inbreeding - 421.2 (R≥0.95) of the day, which is above the average for the group of outbreed and inbreed animals by 22.6 and 11.1 days, respectively.

Mass selection of wheat for grain filling without transient photosynthesis

Euphytica ◽  
1991 ◽  
Vol 54 (1) ◽  
pp. 111-116 ◽  
Author(s):  
A. Blum ◽  
L. Shpiler ◽  
G. Golan ◽  
J. Mayer ◽  
B. Sinmena
Keyword(s):  
Grain Filling ◽  
Mass Selection ◽  
Selection Of

Nondestructive Mass Selection of Small van der Waals Clusters

Science ◽  
1994 ◽  
Vol 266 (5189) ◽  
pp. 1345-1348 ◽  
Author(s):  
W. Schollkopf ◽  
J. P. Toennies
Keyword(s):  
Van Der Waals ◽  
Mass Selection ◽  
Van Der Waals Clusters ◽  
Selection Of

scholarly journals Adaptive ability of the poultry and its importance in the selection of animals

2018 ◽  
Vol 20 (84) ◽  
Author(s):  
H. A. Paskevych ◽  
A. V. Hunchak ◽  
L. M. Fialovych
Keyword(s):  
Environmental Changes ◽  
Climatic Conditions ◽  
The Body ◽  
Farm Animals ◽  
Mass Selection ◽  
Family Farms ◽  
Polygenic Inheritance ◽  
Adaptive Capabilities ◽  
Selection Of ◽  
Poultry Farming

An important property of living organisms is the ability to adapt to the influence ofthe externalfactors that is constant adaptation to environmental changes, while preserving the constancy of the internal environment. At the present levelof thedevelopment of poultry farming in agro farms of different types, the choice of the most adaptive and competitive breeds and crossbreds of the poultry in the production of eggs and meat is of great importance. Farm animals are affected by various external factors such as technology of keeping, production, veterinary and prophylactic and zootechnical measures. According to various scientific sources, a significant number of poultry crosses are used in Ukraine, mainly for the selection of leading firms in the USA, Canada, and Western Europe (foreign breeds in Ukraine account about 80% of the total poultry population). They provide a high degree of implementation of the genetic productivity potential, butunder rather controlled, almost climatic conditions of keeping and feeding. At the same time, they are very responsive to changing of environment when used in the conditions of the breeding and commodity enterprises of Ukraine. This is due to the fact that the main economic-useful signs of the bird (bearing, weight of eggs, reproductive qualities) have polygenic inheritance and, accordingly, have a small fate of additivity of the operating genes. Therefore, in the new conditions of exploitation of cross-breeds of foreign selection on the indicated signs there is a significant influence of interaction «genotype × environment», which reduces the combinational ability of the family farms and, accordingly, manifestation of the heterosys effect. To preserve the structure of the cross, adaptation of the original family forms to the specific conditions of the poultry holdings is necessary, and then the implementation of supporting selection during mass selection of repair young animals. It should be taken into account that the suitability of imported lines, family forms or final bird hybrids is limited to the limits of their physiological response, since their heredity is formed in the conditions of the country where they are bred. The problem of adaptation of poultry in the conditions of industrial poultry farming is constantly relevant. The intensification of the industry leads to the new adaptation factors, in particular, different technological conditions for repair young animals and adult herds, changes in the recipes of feed and the quality of their components in other regions, the movement of poultry, stresses and so on. At the present, it is important to take into account both adaptive responses, acclimatization capacity of poultry and other animals imported from abroad, and selection according to the indicators of the reaction of the body for different methods of their study. In this regard, it is advisable to use crosses that have high adaptive capabilities.

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