scholarly journals Male fertility versus sterility, cytotype, and DNA quantitative variation in seed production in diploid and tetraploid sea lavenders (Limonium sp., Plumbaginaceae) reveal diversity in reproduction modes

2012 ◽  
Vol 25 (4) ◽  
pp. 305-318 ◽  
Author(s):  
Ana Sofia Róis ◽  
Generosa Teixeira ◽  
Timothy F. Sharbel ◽  
Jörg Fuchs ◽  
Sérgio Martins ◽  
...  
Keyword(s):  
Seed Production ◽  
Male Fertility ◽  
Quantitative Variation

scholarly journals Male Fertility Genes in Bread Wheat (Triticum aestivum L.) and Their Utilization for Hybrid Seed Production

2021 ◽  
Vol 22 (15) ◽  
pp. 8157
Author(s):  
Manjit Singh ◽  
Marc C. Albertsen ◽  
A. Mark Cigan
Keyword(s):  
Male Sterility ◽  
Seed Production ◽  
Male Fertility ◽  
Production Systems ◽  
Triticum Aestivum L ◽  
Hybrid Seed ◽  
Addition Line ◽  
Hybrid Seed Production ◽  
Wheat Varieties ◽  
The Cost

Hybrid varieties can provide the boost needed to increase stagnant wheat yields through heterosis. The lack of an efficient hybridization system, which can lower the cost of goods of hybrid seed production, has been a major impediment to commercialization of hybrid wheat varieties. In this review, we discuss the progress made in characterization of nuclear genetic male sterility (NGMS) in wheat and its advantages over two widely referenced hybridization systems, i.e., chemical hybridizing agents (CHAs) and cytoplasmic male sterility (CMS). We have characterized four wheat genes, i.e., Ms1, Ms5, TaMs26 and TaMs45, that sporophytically contribute to male fertility and yield recessive male sterility when mutated. While Ms1 and Ms5 are Triticeae specific genes, analysis of TaMs26 and TaMs45 demonstrated conservation of function across plant species. The main features of each of these genes is discussed with respect to the functional contribution of three sub-genomes and requirements for complementation of their respective mutants. Three seed production systems based on three genes, MS1, TaMS26 and TaMS45, were developed and a proof of concept was demonstrated for each system. The Tams26 and ms1 mutants were maintained through a TDNA cassette in a Seed Production Technology-like system, whereas Tams45 male sterility was maintained through creation of a telosome addition line. These genes represent different options for hybridization systems utilizing NGMS in wheat, which can potentially be utilized for commercial-scale hybrid seed production.

Fertility variation, seed collection and gene diversity in natural stands of Taurus cedar (Cedrus libani)

2020 ◽  
Author(s):  
Nebi Bilir ◽  
Kyu-Suk Kang
Keyword(s):  
Seed Production ◽  
Male Fertility ◽  
Gene Diversity ◽  
Primary Objective ◽  
Effective Number ◽  
Fertility Variation ◽  
Genetic Resources Management ◽  
Natural Stands ◽  
Seed Stand ◽  
Male Strobili

Abstract Background Seed stand is one of the important seed sources that is essential for global seed production programs. The primary objective of seed stands is to produce seeds as fast as possible. Characteristics of seed stand seeds depend mainly on stand quality, fertility variation and mating system. Individual fertility is an ability to produce progeny to next generation. Prediction of fertility variation is useful for seed production, genetic resources management and gene conservation. In this study, we report how to estimate fertility variation and gene diversity, and discuss its effect on the management of natural stands of Taurus cedar. Results Fertility variation and gene diversity were estimated based on the differences of strobilus production in female and male parents from three seed stands of Taurus cedar. A total of 50 trees were randomly chosen from each seed stand, and the female and male strobili were counted for three consecutive years. The coefficients of variation for female and male strobilus production were subjected to estimation female and male fertility variation. The total fertility variation (Ψ) was then estimated from the female and male fertility variation. The effective number of parents (Np) was calculated based on the Ψ. The mean of female strobili ranged from 31 to 150, and that of male strobili ranged between 77 and 828. The Ψ in a good crop year was smaller than in a poor year and the Np varied from 34.7 to 44.2. The Ψ was improved and the Np was increased when strobilus productions were pooled across three years or populations. The equal cone harvest could mitigate the fertility variation among individuals but caused loss of seed production. Conclusions The effective number of parents could estimate gene diversity of seeds from natural stands, which was based on the function of correlated fertility variation between female and male parents. Mixing seeds from different years could improve the fertility variation among individuals and increase the gene diversity of seeds. However, a balancing between the effective number of parents and the number of mixed years or populations should be carefully considered for maintaining the gene diversity.

scholarly journals Autosomal recessive loci contribute significantly to quantitative variation of male fertility in a dairy cattle population

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Maya Hiltpold ◽  
Naveen Kumar Kadri ◽  
Fredi Janett ◽  
Ulrich Witschi ◽  
Fritz Schmitz-Hsu ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Male Fertility ◽  
Semen Quality ◽  
Quantitative Variation ◽  
Whole Genome Sequence ◽  
Whole Genome Sequencing Data ◽  
Whole Genome ◽  
Cattle Population ◽  
Brown Swiss ◽  
Causal Variants

Abstract Background Cattle are ideally suited to investigate the genetics of male fertility. Semen from individual bulls is used for thousands of artificial inseminations for which the fertilization success is monitored. Results from the breeding soundness examination and repeated observations of semen quality complement the fertility evaluation for each bull. Results In a cohort of 3881 Brown Swiss bulls that had genotypes at 683,609 SNPs, we reveal four novel recessive QTL for male fertility on BTA1, 18, 25, and 26 using haplotype-based association testing. A QTL for bull fertility on BTA1 is also associated with sperm head shape anomalies. All other QTL are not associated with any of the semen quality traits investigated. We perform complementary fine-mapping approaches using publicly available transcriptomes as well as whole-genome sequencing data of 125 Brown Swiss bulls to reveal candidate causal variants. We show that missense or nonsense variants in SPATA16, VWA3A, ENSBTAG00000006717 and ENSBTAG00000019919 are in linkage disequilibrium with the QTL. Using whole-genome sequence data, we detect strong association (P = 4.83 × 10− 12) of a missense variant (p.Ile193Met) in SPATA16 with male fertility. However, non-coding variants exhibit stronger association at all QTL suggesting that variants in regulatory regions contribute to variation in bull fertility. Conclusion Our findings in a dairy cattle population provide evidence that recessive variants may contribute substantially to quantitative variation in male fertility in mammals. Detecting causal variants that underpin variation in male fertility remains difficult because the most strongly associated variants reside in poorly annotated non-coding regions.

scholarly journals Autosomal recessive loci contribute significantly to quantitative variation of male fertility in a dairy cattle population

2020 ◽  
Author(s):  
Maya Hiltpold ◽  
Naveen Kadri ◽  
Fredi Janett ◽  
Ulrich Witschi ◽  
Fritz Schmitz-Hsu ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Male Fertility ◽  
Autosomal Recessive ◽  
Missense Variant ◽  
Causal Variant ◽  
Fertilization Success ◽  
Quantitative Variation ◽  
Whole Genome Sequence ◽  
Cattle Population ◽  
Association Testing

Cattle are ideally suited to investigate the genetics of male fertility. Semen from individual bulls is used for thousands of artificial inseminations for which the fertilization success is monitored. In a cohort of 3881 bulls that had genotypes at 589,791 SNPs, we reveal four novel recessive QTL for male fertility using haplotype-based association testing. We detect either missense or nonsense variants in SPATA16, VWA3A, ENSBTAG00000006717 and ENSBTAG00000019919 that are in linkage disequilibrium with the QTL. A QTL for bull fertility on BTA1 is also associated with sperm head shape anomalies. Using whole-genome sequence and transcriptome data, we prioritise a missense variant (p.Ile193Met) in SPATA16 as candidate causal variant underlying this QTL. Our findings in a dairy cattle population provide evidence that recessive variants may contribute substantially to quantitative variation in male fertility in mammals.

Native Seed Production Manual for the Pacific Northwest

2016 ◽  
Vol 17 (2) ◽  
pp. 134-135
Author(s):  
Amy Bartow ◽  
Keyword(s):  
Pacific Northwest ◽  
Seed Production ◽  
Native Seed ◽  
The Pacific

Some insects affecting Penstemon seed production

2012 ◽  
Vol 13 (2) ◽  
pp. 107-111
Author(s):  
R. Hammon ◽  
M. Franklin
Keyword(s):  
Seed Production

PRIMING AS THE FACTOR OF INCREASE OF EFFICIENCY SEED PRODUCTION OF BIRDSFOOT TREFOIL

2020 ◽  
Author(s):  
Vladimir Zolotarev
Keyword(s):  
Seed Production ◽  
Characteristic Property ◽  
Seed Priming ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Germination Energy ◽  
Field Germination

A characteristic property of legumes is the formation of hard-stone seeds. To use such seeds for sowing, it is necessary to carry out measures to increase their seeding indicators. The article provides an overview of methods of pre-sowing preparation of seeds, priming (Seed Priming). The harvest of Birdsfoot trefoil (Lotus corniculatus L.) can contain up to 90% or more hard-stone seeds. Mechanical priming of hard-stone seeds of Birdsfoot trefoil increases their germination energy and field germination.

Onion sets as planting material for seed production of three cultivars in Uruguay

2016 ◽  
Vol 44 (3) ◽  
pp. 500-513
Author(s):  
S. Peluffo ◽  
H. González Idiarte ◽  
A. Borges ◽  
J. Arboleya ◽  
G.A. Galván
Keyword(s):  
Seed Production ◽  
Planting Material

Testing male fertility

2014 ◽  
Author(s):  
Myung-Geol Pang
Keyword(s):  
Male Fertility

Effect of new dietary supplement on sperm quality

2012 ◽  
Vol 153 (45) ◽  
pp. 1787-1792 ◽  
Author(s):  
Mária Horváth ◽  
Endre Czeizel
Keyword(s):  
Adverse Effect ◽  
Clinical Trial ◽  
Dietary Supplement ◽  
Male Fertility ◽  
Sperm Quality ◽  
Sperm Count ◽  
Before And After ◽  
The Usa ◽  
New Treatments

Introduction: There is a decline in male fertility thus new treatments are needed. Aims: To test the efficacy of a new dietary supplement developed in the USA and registered as a curing drug in Hungary (OGYI). Methods: In a clinical trial 100 men with low sperm quality (spermium count 5–20 M/ml, good motility 10–40%, and adverse shape 30–50%) were examined. Results: Sperm parameters were measured before and after a 3-month treatment and after another 3-month without treatment. This dietary supplement statistically and clinically significantly improved sperm count and motility. In 74 cases this dietary supplement demonstrated a beneficial effect on sperm quality (more than 10% increase in sperm count, or quality of motility, or shape); in 16 cases the improvement exceeded 30%. No adverse effect could be accounted for this treatment. Conclusions: This new dietary supplement may contribute to the treatment of male infertility. Orv. Hetil., 2012, 153, 1787–1792.

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