scholarly journals Quick validation of genetic quality for conditional alleles in mice

2021 ◽  
Vol 26 (4) ◽  
pp. 240-245
Author(s):  
Hatsumi Nakata ◽  
Tomomi Hashimoto ◽  
Atsushi Yoshiki
Keyword(s):  
Genetic Quality

scholarly journals Fluctuating Asymmetry and Sexual Dimorphism in Human Facial Morphology: A Multi-Variate Study

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 304
Author(s):  
Omid Ekrami ◽  
Peter Claes ◽  
Ellen Van Assche ◽  
Mark D. Shriver ◽  
Seth M. Weinberg ◽  
...  
Keyword(s):  
Fluctuating Asymmetry ◽  
Life History Traits ◽  
Principal Component ◽  
Underlying Mechanism ◽  
High Density ◽  
Direct Result ◽  
Facial Morphology ◽  
Strongly Correlated ◽  
Large Dataset ◽  
Genetic Quality

(1) Background: Fluctuating asymmetry is often used as an indicator of developmental instability, and is proposed as a signal of genetic quality. The display of prominent masculine phenotypic features, which are a direct result of high androgen levels, is also believed to be a sign of genetic quality, as these hormones may act as immunosuppressants. Fluctuating asymmetry and masculinity are therefore expected to covary. However, there is lack of strong evidence in the literature regarding this hypothesis. (2) Materials and methods: In this study, we examined a large dataset of high-density 3D facial scans of 1260 adults (630 males and 630 females). We mapped a high-density 3D facial mask onto the facial scans in order to obtain a high number of quasi-landmarks on the faces. Multi-dimensional measures of fluctuating asymmetry were extracted from the landmarks using Principal Component Analysis, and masculinity/femininity scores were obtained for each face using Partial Least Squares. The possible correlation between these two qualities was then examined using Pearson’s coefficient and Canonical Correlation Analysis. (3) Results: We found no correlation between fluctuating asymmetry and masculinity in men. However, a weak but significant correlation was found between average fluctuating asymmetry and masculinity in women, in which feminine faces had higher levels of fluctuating asymmetry on average. This correlation could possibly point to genetic quality as an underlying mechanism for both asymmetry and masculinity; however, it might also be driven by other fitness or life history traits, such as fertility. (4) Conclusions: Our results question the idea that fluctuating asymmetry and masculinity should be (more strongly) correlated in men, which is in line with the recent literature. Future studies should possibly focus more on the evolutionary relevance of the observed correlation in women.

scholarly journals An introduction to genetic quality in the context of sexual selection

Genetica ◽  
2008 ◽  
Vol 134 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Trevor E. Pitcher ◽  
Herman L. Mays
Keyword(s):  
Sexual Selection ◽  
Genetic Quality

More sires may enhance offspring fitness in Northern Map Turtles (Graptemys geographica)

2013 ◽  
Vol 91 (8) ◽  
pp. 581-588 ◽  
Author(s):  
Nicola Banger ◽  
Gabriel Blouin-Demers ◽  
Grégory Bulté ◽  
Stephen C. Lougheed
Keyword(s):  
Sexual Selection ◽  
Reproductive Success ◽  
Hatching Success ◽  
Locomotor Performance ◽  
Conservative Estimate ◽  
Genetic Quality ◽  
Offspring Fitness ◽  
Sexual Selection Theory ◽  
Map Turtles ◽  
Graptemys Geographica

Sexual selection theory predicts that males should be promiscuous to maximize their reproductive success, while females should be choosy. Yet females of many taxa often produce progeny sired by multiple males, indicating that promiscuity can be important for the reproductive success of females. Promiscuity may enhance the fitness of females if it increases the genetic quality, or the genetic variety, and thus the viability of their offspring. We quantified the number of sires per clutch in a population of Northern Map Turtles (Graptemys geographica (LeSueur, 1817)) in Lake Opinicon, Ontario, Canada, and tested whether the number of sires affects several metrics of viability in hatchlings. Based on the most conservative estimate, at least 71% of clutches in this population are sired by multiple males, but there was no evidence that larger clutches are sired by more males. Clutches sired by more males had higher hatching success and survival, but the differences were not statistically significant. We did not find any effect of the number of sires on hatchling morphology or locomotor performance. Collectively, our results partially support the hypothesis that promiscuity can increase the reproductive success of female Northern Map Turtles.

scholarly journals In-Law and Mate Preferences in Chinese Society and the Role of Traditional Cultural Values

2017 ◽  
Vol 15 (3) ◽  
pp. 147470491773051 ◽  
Author(s):  
Qingke Guo ◽  
Yujie Li ◽  
Shushuang Yu
Keyword(s):  
Social Status ◽  
Cultural Values ◽  
Filial Piety ◽  
Chinese Culture ◽  
Parental Influence ◽  
Mate Preferences ◽  
Chinese Society ◽  
Genetic Quality ◽  
Parental Preferences ◽  
Parent Child

Using 347 parent–child dyads as participants, this study directly examined in-law and mate preferences in a typical collectivist culture. The results showed (1) traits indicating social status and parental investment were more highly valued by the parents, while traits indicating genetic quality and traits related to romantic love were more highly valued by the children. (2) Parental preferences were moderated by gender of the in-laws. Good earning capacity was more preferred by parents in a son-in-law, traits connoting genetic quality and reproductive fitness were more preferred by parents in a daughter-in-law. (3) There was more convergence in in-law and mate preferences in Chinese culture than in Western cultures. (4) Traditional cultural values (i.e., filial piety) can be used as a predictor of traditional mate preferences and less parent–child divergences. Additionally, greater preference for kind and understanding by parents than by children as well as by daughters than by sons, and greater preference for social status by the daughters’ than by the sons’ parents have not been observed in the rating and the ranking instrument. These findings illustrated how culture handles the parent–child disagreement over mating by authorizing greater parental influence on children’s mating decisions.

Procurement of plant material of good genetic quality

2004 ◽  
pp. 139-151
Author(s):  
Christian Pilegaard Hansen ◽  
Erik Kjær ◽  
Lars Graudal ◽  
Hans Roulund
Keyword(s):  
Plant Material ◽  
Genetic Quality

Freshwater pearl culture in China.

2020 ◽  
Author(s):  
Lin Cao
Keyword(s):  
Shell Length ◽  
Culture Period ◽  
Production Cycle ◽  
High Quality ◽  
Host Fish ◽  
Genetic Quality ◽  
Operative Care ◽  
Artificial Breeding

Abstract Artificial breeding of freshwater pearl mussels is widely used to improve the yield of pearl culture. All phases of the production cycle, including collection and culture of the broodstock, release of the glochidia, provision of the host fish for glochidia to attach to, and collection of mussel seeds, can be controlled artificially. The advantages of artificial breeding are that it can help to produce high quality pearls and improve the genetic quality of pearl mussels. Collected mussel seed are transferred from holding jars into small 200 µm mesh baskets (10 cm diameter x 5 cm). Each basket was supplied individually with 0.1-0.2 L of water per minute. When the mussels' shell length reaches over 10 cm, they can be operated to culture pearl. After post-operative care the implanted mussels are stocked in ponds. The mussels are kept in nylon bags (2 mussels per bag) and are hung from bamboo or PVC pipes and placed in ponds at 1 m depth. Periodical checking of mussels, with removal of dead ones and cleaning of bags, is required throughout the culture period of 12-18 months.

Do Don Juans have better genes than family men?

2000 ◽  
Vol 23 (4) ◽  
pp. 601-602
Author(s):  
Alice H. Eagly
Keyword(s):  
Fluctuating Asymmetry ◽  
Alternative Interpretation ◽  
Short Term ◽  
Genetic Quality

An alternative interpretation of Gangestad & Simpson's findings features the assumption that only a subgroup of those men who are low in fluctuating asymmetry are typically available for short-term mating. In general, these philandering men do not offer higher genetic quality than men who are securely attached to long-term mates.

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