Morphological, ecophysiological and photosynthetic diversity of some Pistacia species for use in breeding programs

Program pemuliaan ikan mas varietas Punten dilakukan dengan seleksi individu terhadap karakter bobot ikan. Pembentukan populasi dasar untuk kegiatan seleksi dilakukan dengan memijahkan secara massal induk ikan mas yang terdiri atas 20 induk betina dan 21 induk jantan yang dikoleksi dari daerah Punten, Kepanjen (delapan betina dan enam jantan), Kediri (tujuh betina dan 12 jantan), Sragen (27 betina dan 10 jantan), dan Blitar (15 betina dan 11 jantan). Larva umur 10 hari dipelihara selama empat bulan. Selanjutnya dilakukan penjarangan sebesar 50% dan benih dipelihara selama 14 bulan untuk dilakukan seleksi dengan panduan hasil sampling 250 ekor individu setiap populasi. Seleksi terhadap calon induk dilakukan saat umur 18 bulan pada populasi jantan dan betina secara terpisah dengan memilih berdasarkan 10% bobot ikan yang terbaik. Calon induk yang terseleksi kemudian dipelihara hingga matang gonad, kemudian dipilih sebanyak 150 pasang dan dipijahkan secara massal. Didapatkan respons positif dari hasil seleksi berdasarkan bobot ikan, yaitu 49,89 g atau 3,66% (populasi ikan jantan) dan 168,47 g atau 11,43% (populasi ikan betina). Nilai heritabilitas untuk bobot ikan adalah 0,238 (jantan) dan 0,505 (betina).Punten carp breeding programs were carried out by individual selection for body weight trait. The base population for selection activities were conducted by mass breeding of parent consisted of 20 female and 21 male collected from area Punten, eight female and six male (Kepanjen), seven female and 12 male (Kediri), 27 female and 10 male (Sragen), 15 female and 11 male (Blitar). Larvae 10 days old reared for four moths. Then after spacing out 50% of total harvest, the offspring reared for 14 months for selection activity based on the sampling of 250 individual each population. Selection of broodstock candidates performed since 18 months age on male and female populations separately by selecting based on 10% of fish with best body weight. Candidates selected broodstocks were then maintained until mature. In oder to produce the next generation 150 pairs were sets and held for mass spawning. The results revealed that selection response were positive, 49.89 g (3.66%) for male and 168.47 (11.43%) for female. Heritability for body weight is 0.238 (male) and 0.505 (female).

Download Full-text

SCREENING OF WHEAT LR-GENES FOR RESISTANCE TO PUCCINIA TRITICINA IN THE NORTH CAUCASUS REGION CONDITIONS

Vestnik of the Russian agricultural science ◽

10.30850/vrsn/2019/5/54-56 ◽

1970 ◽

pp. 54-56

Author(s):

G. V. Volkova ◽

O. A. Kudinova ◽

O. F. Vaganova

Keyword(s):

Winter Wheat ◽

Leaf Rust ◽

Puccinia Triticina ◽

North Caucasus ◽

Breeding Programs ◽

Lr Genes ◽

Caucasus Region ◽

Highly Efficient ◽

The North ◽

Wheat Rust

Currently, more than 70 wheat rust resistance genes are known, but few of them are effective. The purpose of this work is to screen lines of Lr gene carriers for resistance to leaf rust under conditions of the North Caucasus region. Investigations were carried out in 2016-2018 at the infectious site of VNIIBZR. Research material was 49 near isogenic lines of winter wheat cultivar Thatcher. Infectious material was the combined populations of P. triticina, obtained as a result of route surveys of industrial and breeding crops of winter wheat in the areas of the Krasnodar, Stavropol Territories and the Rostov Region, conducted in 2016-2018. According to the assessment, the genes are ranked as follows: - highly efficient genes (plants with no signs of damage): Lr9, Lr42, Lr43 + 24 and Lr50; effective (1R-5R) Lr genes: 19, 24, 29, 36, 37, 38, 45, 47; moderately effective (10MR-20MR) Lr genes: 17, 18, 21, 22a, 28, 32, 41, 52. The remaining Lr-lines were susceptible to P. triticina (25 MR - 90S) to varying degrees. Highly efficient and effective genes Lr9, Lr19, Lr24, Lr29, Lr38, Lr42, Lr43 + 24, Lr47 and Lr50 showed resistance in the seedling phase and can be recommended for inclusion in breeding programs to protect wheat from leaf rust in different phases of plant ontogenesis in the North Caucasus region.

Download Full-text

Matoa (Pometia Pinata Foster): Local Fruit Papua and Strategy Development

Beccariana Botanical Research Bulletin ◽

10.30862/bbrp.v7i1.276 ◽

2010 ◽

Vol 7 (1) ◽

Author(s):

Julius D. Nugroho

Keyword(s):

Genetic Resources ◽

Fruit Tree ◽

Breeding Program ◽

Strategy Development ◽

Local Market ◽

Font Size ◽

Breeding Programs ◽

Irian Jaya ◽

Forest Exploitation ◽

Program Strategy

Matoa (Pometia pinnata) is a local fruit of  Papua (formerly called Irian Jaya) which has high potensial to develop as comercial fruit. Highly significant genetic resources of matoa potentially for breeding program in Papua are being threatened as a result of cutting down trees for fruit harvesting and of forest exploitation for timber. Besides the loss of genetic resources facing now, other major problems should be consider for conservation and domestication of this fruit tree species i.e. lack of silviculture and agronomy knowledge for further breeding programs; matoa production only for local market; and inadequate government policy for matoa breeding program. Strategy developed for matoa conservation and domestication should also concern about time limited due to the fast loss of genetic poll. This paper provides a general overview of strategy for conservation and domestication of Pometia pinnata with special reference to Papua.

Download Full-text

Effect of Migration or Inbreeding Followed by Selection on Low-Founder-Number Populations: Implications for Captive Breeding Programs

Conservation Biology ◽

10.1046/j.1523-1739.1995.9051216.x ◽

1995 ◽

Vol 9 (5) ◽

pp. 1216-1224 ◽

Cited By ~ 5

Author(s):

VICKIE L. BACKUS ◽

EDWIN H. BRYANT ◽

COLIN R. HUGHES ◽

LISA M. MEFFERT

Keyword(s):

Captive Breeding ◽

Breeding Programs ◽

Captive Breeding Programs

Download Full-text

Evaluation of pear (Pyrus communis L.) hybrid combinations for the transmission of fire blight resistance and fruit characteristics

Czech Journal of Genetics and Plant Breeding ◽

10.17221/17/2017-cjgpb ◽

2018 ◽

Vol 54 (No. 2) ◽

pp. 78-85 ◽

Cited By ~ 5

Author(s):

Y. Evrenosoğlu ◽

K. Mertoğlu

Keyword(s):

Fire Blight ◽

Animal Health ◽

Blight Resistance ◽

Fruit Characteristics ◽

Breeding Programs ◽

Pyrus Communis L ◽

Management Method ◽

Resistant Rootstock ◽

Santa Maria ◽

Harmful Effects

Fire blight is one of the most destructive diseases of pome fruits, especially pears. In current conditions when the demand for organic products is increasing, improvement of resistant rootstock and varieties is becoming important due to the lack of an effective disease management method against fire blight caused by Erwinia amy-lovora as well as the harmful effects of chemicals on environment, human and animal health. The findings of the researchers as to which variety performs well in terms of the transmission of fire blight resistance are quite important for new breeding programs. In the study, three varieties with high commercial value (Magness, Santa Maria and Williams) were identified as the maternal parents and 21 hybridization combinations were made with seven varieties (Akça, Ankara, Conference, Güz, Kaiser Alexandre, Kieffer and Taş) as pollinators. The Magness maternal parent was found superior when compared with the other maternal parents for the variety susceptibility level to fire blight. Apart from the differences in the susceptibility level of 21 different combinations of hybrids to fire blight, the commercially superior ten hybrids (I-15-24, II-13-1, II-13-19, II-13-34, II-13-73, II-27-21, II-27-55, II -32-44, III-22-638, III-27-590) have been determined via the weighted ranking method from the parameters of disease resistance and different fruit characteristics measuring the commercial preference of the fruits such as fruit quality, attractiveness, size, firmness and rustiness

Download Full-text

A Novel 13 bp Deletion within the NR6A1 Gene Is Significantly Associated with Growth Traits in Donkeys

Animals ◽

10.3390/ani9090681 ◽

2019 ◽

Vol 9 (9) ◽

pp. 681 ◽

Cited By ~ 3

Author(s):

Xiya Fang ◽

Zhenyu Lai ◽

Jie Liu ◽

Chunlan Zhang ◽

Shipeng Li ◽

...

Keyword(s):

Nuclear Receptor ◽

Growth Traits ◽

Polyacrylamide Gel Electrophoresis ◽

Embryonic Stem ◽

The Body ◽

Economic Traits ◽

Breeding Programs ◽

Intron 1 ◽

Group A ◽

Nuclear Receptor Family

Nuclear receptor subfamily 6, group A, member 1 (NR6A1), as an important member of the nuclear receptor family, plays an important role in regulating growth, metabolism, and differentiation of embryonic stem cells. For this reason, the NR6A1 gene is considered to be a promising candidate for economic traits and was found to be associated with body size traits in many livestock. However, no studies have been conducted on NR6A1 in donkeys so far. Thus, in this research, we focused on donkeys and identified a 13 bp deletion in intron-1 of the NR6A1 gene among 408 individuals from Guanzhong and Dezhou donkeys using polyacrylamide gel electrophoresis. Three genotypes were identified, namely II, ID, and DD. The association analysis indicated that the body lengths and body heights5f genotype II individuals were significantly different to those of genotype ID in Dezhou donkeys. Conclusively, the 13 bp deletion was associated with growth traits in both Guanzhong donkeys and Dezhou donkeys, indicating that the NR6A1 gene could be a possible candidate gene in marker-assisted selection for donkey breeding programs.

Download Full-text

Exploring Smallholder Farmers’ Preferences for Climate-Smart Seed Innovations: Empirical Evidence from Southern Ethiopia

Sustainability ◽

10.3390/su13052786 ◽

2021 ◽

Vol 13 (5) ◽

pp. 2786

Author(s):

Shimelis Araya Geda ◽

Rainer Kühl

Keyword(s):

Smallholder Farmers ◽

Preference Heterogeneity ◽

Southern Ethiopia ◽

Significant Preference ◽

Experiment Data ◽

Breeding Programs ◽

Drought Tolerant ◽

The Face ◽

Mnl Model ◽

Participatory Research Methods

Rapid plant breeding is essential to overcome low productivity problems in the face of climatic challenges. Despite considerable efforts to improve breeding practices in Ethiopia, increasing varietal release does not necessarily imply that farmers have access to innovative varietal choices. Prior research did not adequately address whether varietal attributes are compatible with farmers’ preferences in harsh environmental conditions. With an agricultural policy mainly aiming to achieve productivity maximization, existing breeding programs prioritize varietal development based on yield superiority. Against this background, we estimated a multinomial logit (MNL) model based on choice-experiment data from 167 bean growers in southern Ethiopia to explore whether farmers’ attribute preferences significantly diverge from those of breeders’ priorities. Four important bean attributes identified through participatory research methods were used. The results demonstrate that farmers have a higher propensity toward drought-tolerant capability than any of the attributes considered. The model estimates further show the existence of significant preference heterogeneity across farmers. These findings provide important insight to design breeding profiles compatible with specific producer segments. We suggest demand-driven breeding innovations and dissemination strategies in order to accelerate the adoption of climate-smart and higher-yielding bean innovations that contribute to achieve the national and global sustainability goals in Ethiopia.

Download Full-text

Adaptation assessment of drought tolerance in maize populations from the Sahara in both shores of the Mediterranean Sea

Euphytica ◽

10.1007/s10681-021-02902-z ◽

2021 ◽

Vol 217 (8) ◽

Author(s):

Oula Maafi ◽

Pedro Revilla ◽

Lorena Álvarez-Iglesias ◽

Rosa Ana Malvar ◽

Abderahmane Djemel

Keyword(s):

Drought Tolerance ◽

Biomass Production ◽

Genetic Regulation ◽

Breeding Programs ◽

Favorable Alleles ◽

Maize Germplasm ◽

Maize Populations ◽

Potential Source ◽

Main Stress ◽

And Control

AbstractDrought is the main stress for agriculture, and maize (Zea mays L.) germplasm from the Sahara has been identified as potential source of drought tolerance; however, information about adaptation of semitropical maize germplasm from the Sahara to temperate areas has not been reported. Our objective was assessing the adaptation of maize germplasm from Saharan oases as sources of drought tolerance for improving yield and biomass production under drought conditions in temperate environments. A collection of maize populations from Saharan oases was evaluated under drought and control conditions in Spain and Algeria. Algerian populations were significantly different under drought for most traits, and the significant genotype × environment interactions indicated that drought tolerance is genotype-dependent, but tolerance differences among genotypes change across environments. Based on yield, the Algerian maize populations PI527474, PI527478, PI527472, PI527467, PI527470, and PI527473 would be appropriate sources of drought tolerance for temperate environments. Concerning biomass production, the most interesting populations were PI527467, PI542685, PI527478, and PI527472. These Saharan populations could provide favorable alleles for drought tolerance for temperate breeding programs, and could also be used for studying mechanisms and genetic regulation of drought tolerance.

Download Full-text

Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil

Tropical Plant Pathology ◽

10.1007/s40858-020-00417-x ◽

2021 ◽

Author(s):

Barbara Ludwig Navarro ◽

Lucia Ramos Romero ◽

María Belén Kistner ◽

Juliana Iglesias ◽

Andreas von Tiedemann

Keyword(s):

Exserohilum Turcicum ◽

Breeding Programs ◽

Physiological Races ◽

Maize Leaves ◽

Race 1 ◽

Resistance Reaction ◽

Qualitative Resistance ◽

Maize Plants ◽

Corn Leaf Blight ◽

Resistant Genotypes

AbstractNorthern corn leaf blight (NCLB) is one of the most important diseases in maize worldwide. It is caused by the fungus Exserohilum turcicum, which exhibits a high genetic variability for virulence, and hence physiological races have been reported. Disease control is based mainly on fungicide application and host resistance. Qualitative resistance has been widely used to control NCLB through the deployment of Ht genes. Known pathogen races are designated according to their virulence to the corresponding Ht gene. Knowledge about of E. turcicum race distribution in maize-producing areas is essential to develop and exploit resistant genotypes. Maize leaves showing distinct elliptical grey-green lesions were collected from maize-producing areas of Argentina and Brazil, and 184 monosporic E. turcicum isolates were obtained. A total of 66 isolates were collected from Argentina during 2015, 2018 and 2019, while 118 isolates from Brazil were collected during 2017, 2018 and 2019. All isolates were screened on maize differential lines containing Ht1, Ht2, Ht3 and Htn1 resistance genes. In greenhouse experiments, inoculated maize plants were evaluated at 14 days after inoculation. Resistance reaction was characterized by chlorosis, and susceptibility was defined by necrosis in the absence of chlorosis. The most frequent race was 0 in both Argentina (83%) and Brazil (65%). Frequencies of race 1 (6% and 24%) and race 23N (5% and 10%) were very low in Argentina and Brazil, respectively. The high frequency of race 0 isolates provides evidence that qualitative resistance based on the tested Ht genes is not being used extensively in Argentina and Brazil to control NCLB. This information may be relevant for growers and breeding programs as the incidence of NCLB is increasing in both countries.

Download Full-text

Disclosing the Nutritional Quality Diversity of Portuguese Common Beans—The Missing Link for Their Effective Use in Protein Quality Breeding Programs

Agronomy ◽

10.3390/agronomy11020221 ◽

2021 ◽

Vol 11 (2) ◽

pp. 221

Author(s):

Elsa Mecha ◽

Sofia Natalello ◽

Bruna Carbas ◽

Andreia Bento da Silva ◽

Susana T. Leitão ◽

...

Keyword(s):

Heat Stress ◽

Amino Acid ◽

Nutritional Quality ◽

Dietary Habits ◽

Protein Quality ◽

Trypsin Inhibitor Activity ◽

Environment Interaction ◽

Individual Amino Acid ◽

Common Beans ◽

Breeding Programs

The common bean (Phaseolus vulgaris L.) represents a sustainable and affordable source of protein, namely, to populations with vegetarian dietary habits. Despite the national germplasm genetic diversity, little is known about the Portuguese accessions’ nutritional and protein quality, leading to their underuse in breeding programs. To fill this gap, a representative collection (106 accessions) was cropped under two contrasting environments (traditional versus heat stress) and evaluated in terms of nutritional quality by near-infrared spectroscopy. Protein quality was assessed, under the stressful environment, considering the individual amino acid contents and the activity of trypsin inhibitors through mass spectrometry (LC-MS/MS) and spectrophotometry, respectively. On top of strong genotypic control, the nutritional composition (protein, fat, fiber, moisture and ash) was also highly influenced by the environment and by genotype × environment interaction, with a clear nutritional quality ranking change for the accessions in heat stress conditions. Classified into three clusters, the accessions from the cluster with the highest individual amino acid and protein contents also showed higher trypsin inhibitor activity (TIA). Since different levels of TIA had no translation into contrasting protein digestibility, breeders focusing on common beans’ protein quality improvement, especially under challenging warming climate conditions, may take advantage of this group of accessions.

Download Full-text