Super hybrid rice varieties with ideal plant architecture (IPA) have been critical in enhancing food security worldwide. However, the molecular mechanisms underlying their improved yield remain unclear. Here, we report the identification of a QTL, qWS8/ipa1-2D, in the super rice Yongyou12 (YY12) and related varieties. In-depth genetic molecular characterization of qWS8/ipa1-2D reveals that this...

There are two distinct reasons for making comparisons of genetic variation for quantitative characters. The first is to compare evolvabilities, or ability to respond to selection, and the second is to make inferences about the forces that maintain genetic variability. Measures of variation that are standardized by the trait mean, such as the additive genetic coefficient of variation, are approp...

Genetic investigation of quantitative behavioral traits Neuropsychiatric geneticists are now focusing considerable attention on the investigation of quantitative human behavioral traits, postulating that such phenotypes could be more straightforward to genetically map than neuropsychiatric disorders. Such syndromes are among the most complex of human traits, a fact that may explain why efforts ...

7. THE POPULATION GENETICS OF SELECTION 201 Single-locus Selection: Two Alleles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 Viability Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 Expected time for allele frequency change . . . . . . . . . . . . . . . . . . . . . . ....

The distribution and heritability of many traits depends on numerous loci in the genome. In general, the astronomical number of possible genotypes makes the system with large numbers of loci difficult to describe. Multilocus evolution, however, greatly simplifies in the limit of weak selection and frequent recombination. In this limit, populations rapidly reach Quasi-Linkage Equilibrium (QLE) i...

20 A major consideration in multitrait analysis is which traits should be jointly analyzed. As a 21 common strategy, multitrait analysis is performed on either pairs of traits or on all of traits. To 22 fully exploit the power of multitrait analysis, we propose variable selection to choose a subset of 23 informative traits for multitrait quantitative trait locus (QTL) mapping. The proposed meth...

Background Plant traits have been used extensively in ecology. They can be used as proxies for resource-acquisition strategies and facilitate the understanding of community structure and ecosystem functioning. However, many reviews and comparative analysis of plant traits do not include mangroves plants, possibly due to the lack of quantitative information available in a centralised form. New...

Genetic analysis of quantitative traits is applied in a wide variety of substantive research areas. Many human characteristics exhibit continuous variation, such as height, weight, intelligence or personality, but the application of quantitative genetics is not limited to traits thought to be continuous. For example, eye color may be assessed in a qualitative fashion – blue versus brown versus ...

Imprinted loci are those where the level of expression of an allele depends upon the allele’s parent of origin. Imprinting is a widespread phenomenon and parent-of-origin effects have been reported for many qualitative and quantitative traits, in particular carcass traits. The effect of parent-of-origin effects on three quantitative traits – eye muscle area and fat depth at the P8 and 12/13 rib...