scholarly journals Unravelling the evolution of complex reproductive traits with phenotypic engineering

2019 ◽  
Vol 28 (15) ◽  
pp. 3461-3463 ◽  
Author(s):  
Heidi S. Fisher
Keyword(s):  
Reproductive Traits ◽  
Phenotypic Engineering

Planting time and mulching influenced vegetative and reproductive traits in strawberry (Fragaria×ananassaDuch.) in India

Fruits ◽  
2005 ◽  
Vol 60 (6) ◽  
pp. 395-403 ◽  
Author(s):  
Rajbir Singh ◽  
Ram Roshan Sharma ◽  
Rajiv Kumar Jain
Keyword(s):  
Reproductive Traits ◽  
Planting Time

The improvement of the type Karatomar of Black-and-White cattle breed under the conditions of Northern Kazakhstan

2020 ◽  
pp. 23-31
Author(s):  
L. Ovchinnikova ◽  
E. Babich
Keyword(s):  
Research Work ◽  
Cattle Breed ◽  
Reproductive Traits ◽  
Farm Animals ◽  
Development Indicators ◽  
Black And White ◽  
Breed Type ◽  
Northern Kazakhstan ◽  
White Breed ◽  
White Cattle

In the Republic of Kazakhstan over the past decade positive changes have been observed in increasing the number of farm animals, increasing their productivity, and increasing the gross production of milk, meat and other products. At the same time the development of dairy cattle breeding is mainly due to the breeding of Black-and-White, Red Steppe, Simmental breeds and their intra-breed types as well as imported from abroad Holstein breed. The purpose of the research was to analyze ways to improve the intra-breed type Karatomar of Black-and-White breed in Northern Kazakhstan. Research work has been carried out on breeding animals such as Karatomar type cattle of Black-and-White breed in LLP “Experimental farm Zarechnoe” in the Kostanay district in the Kostanay region. The dynamics of growth and development indicators, reproductive traits of heifers of a new intra-breed type Karatomar of Black-and-White cattle have been studied. A comprehensive assessment of their economically useful traits in the first lactation, determined by the resistance of animals to climatic and forage conditions, the efficiency of breeding of animals of different genotypes has been conducted. It has been found that the replacement heifers – daughters of American breeding sires inherited precocity and showed higher growth energy after 6 months of age and continued to grow rapidly until 18 months. The advantage in metabolism was in the daughters of Holstein sires of the American selection Orbit 4078, and the increased immune status of the organism in the daughters of the sire of the domestic selection Yamal 975 as the most adapted to the conditions of Northern Kazakhstan. The best ability to increasing the milk yield, stable lactation activity, high milk productivity, gross content of dry matter and nonfat milk solids have been characterized by the daughters of sires of the American selection Orbit 4078 and Lowrider 4129. Analysis of economic indicators of milk production has been shown that from cows – daughters of sires Orbit 4078 and Lowrider 4129 for 305 days of lactation received 15,8 and 15,2 % more milk of base fat, the expenditures of EFU per 1 kg of production was lower by 10,2 and 5,9 %. A higher level of profitability has been observed in the group of daughters of the sires Orbit 4078 – 35,5 % and Lowrider 4129 – 33,1 %, which was 8,5 and 10,8 % higher than in the group of daughters of the sire Yamal 975.

Genetic associations of reproductive traits in pigs

2018 ◽  
Vol 56 (2) ◽  
pp. 265-275
Author(s):  
MONIKA KUMALSKA ◽  
ARKADIUSZ TERMAN
Keyword(s):  
Reproductive Traits ◽  
Genetic Associations

Inter- and Intrasexual Variation in Aging Patterns across Reproductive Traits in a Wild Red Deer Population

2009 ◽  
Vol 174 (3) ◽  
pp. 342
Author(s):  
Nussey ◽  
Kruuk ◽  
Morris ◽  
Clements ◽  
Pemberton ◽  
...  
Keyword(s):  
Red Deer ◽  
Reproductive Traits ◽  
Deer Population

scholarly journals The LEPR Gene Is Associated with Reproductive Seasonality Traits in Rasa Aragonesa Sheep

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2448
Author(s):  
Kenza Lakhssassi ◽  
Malena Serrano ◽  
Belén Lahoz ◽  
María Pilar Sarto ◽  
Laura Pilar Iguácel ◽  
...  
Keyword(s):  
Amino Acid Change ◽  
Leptin Receptor ◽  
Extreme Values ◽  
Reproductive Traits ◽  
Reproductive Seasonality ◽  
Synonymous Substitutions ◽  
Lepr Gene ◽  
Exon 20 ◽  
First Time

The aim of this study was to characterize and identify causative polymorphisms in the leptin receptor (LEPR) gene responsible for the seasonal variation of reproductive traits in sheep. Three reproductive seasonality traits were studied: the total days of anoestrous (TDA), the progesterone cycling months (P4CM) and the oestrous cycling months (OCM). In total, 18 SNPs were detected in 33 ewes with extreme values for TDA and OCM. Six SNPs were non-synonymous substitutions and two of them were predicted in silico as deleterious: rs596133197 and rs403578195. These polymorphisms were then validated in 239 ewes. The SNP rs403578195, located in exon 8 and leading to a change of alanine to glycine (Ala284Gly) in the extracellular domain of the protein, was associated with the OCM trait, being the G allele associated with a decrease of 12 percent of the OCM trait. Haplotype analyses also suggested the involvement of other non-synonymous SNP located in exon 20 (rs405459906). This SNP also produces an amino acid change (Lys1069Glu) in the intracellular domain of the protein and segregates independently of rs403578195. These results confirm for the first time the role of the LEPR gene in sheep reproductive seasonality.

The steroid metabolome of pregnancy, insights into the maintenance of pregnancy and evolution of reproductive traits

2021 ◽  
pp. 111241
Author(s):  
A.J. Conley ◽  
S.C. Loux ◽  
E.L. Legacki ◽  
M.A. Stoops ◽  
B. Pukazhenthi ◽  
...  
Keyword(s):  
Reproductive Traits

scholarly journals Spontaneous Mutational Effects on Reproductive Traits of Arabidopsis thaliana

Genetics ◽  
2000 ◽  
Vol 155 (1) ◽  
pp. 369-378 ◽  
Author(s):  
Ruth G Shaw ◽  
Diane L Byers ◽  
Elizabeth Darmo
Keyword(s):  
Arabidopsis Thaliana ◽  
Spontaneous Mutation ◽  
Reproductive Traits ◽  
Dry Mass ◽  
Negative Effects ◽  
Single Seed Descent ◽  
Standardized Measures ◽  
Significant Divergence ◽  
Further Development ◽  
Mutational Variance

Abstract A study of spontaneous mutation in Arabidopsis thaliana was initiated from a single inbred Columbia founder; 120 lines were established and advanced 17 generations by single-seed descent. Here, we report an assay of reproductive traits in a random set of 40 lines from generations 8 and 17, grown together at the same time with plants representing generation 0. For three reproductive traits, mean number of seeds per fruit, number of fruits, and dry mass of the infructescence, the means did not differ significantly among generations. Nevertheless, by generation 17, significant divergence among lines was detected for each trait, indicating accumulation of mutations in some lines. Standardized measures of mutational variance accord with those obtained for other organisms. These findings suggest that the distribution of mutational effects for these traits is approximately symmetric, in contrast to the usual assumption that mutations have predominantly negative effects on traits directly related to fitness. Because distinct generations were grown contemporaneously, each line was represented by three sublines, and seeds were equal in age, these estimates are free of potentially substantial sources of bias. The finding of an approximately symmetric distribution of mutational effects invalidates the standard approach for inferring properties of spontaneous mutation and necessitates further development of more general approaches that avoid restrictions on the distribution of mutational effects.

scholarly journals Evolution of life cycles and reproductive traits: insights from the brown algae

2021 ◽  
Author(s):  
Svenja Heesch ◽  
Martha Serrano‐Serrano ◽  
Josué Barrera‐Redondo ◽  
Rémy Luthringer ◽  
Akira F. Peters ◽  
...  
Keyword(s):  
Brown Algae ◽  
Reproductive Traits ◽  
Life Cycles ◽  
Evolution Of Life
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