Research on the evaluation of the manual manipulation level of a student pilot in a typical scene.

The traditional evaluation method of student pilots ' manual manipulation level relies too much on teachers' subjective judgment. A quantitative evaluation method based on flight data is proposed to compensate for the shortcoming of the traditional method. According to the theory of the core competence of a pilot, the evaluation index system of manual manipulation level of student pilots in a typical scene is constructed.

Genome-wide copy number variations in Oryza sativa L.

Background: Copy number variation (CNV) can lead to intra-specific genome variations. It is not only part of normal genetic variation, but also is the source of phenotypic differences. Rice (Oryza sativa L.

Detection of copy number variations in rice using array-based comparative genomic hybridization.

Background: Copy number variations (CNVs) can create new genes, change gene dosage, reshape gene structures, and modify elements regulating gene expression. As with all types of genetic variation, CNVs may influence phenotypic variation and gene expression. CNVs are thus considered major sources of genetic variation.

A core collection and mini core collection of Oryza sativa L. in China.

The extent of and accessibility to genetic variation in a large germplasm collection are of interest to biologists and breeders. Construction of core collections (CC) is a favored approach to efficient exploration and conservation of novel variation in genetic resources. Using 4,310 Chinese accessions of Oryza sativa L.

Temporal changes in SSR allelic diversity of major rice cultivars in China.

Forty simple sequence repeats (SSRs) were used to assess the changes of diversity in 310 major Chinese rice cultivars grown during the 1950s-1990s. Of the 40 SSR loci, 39 were polymorphic. A total of 221 alleles were detected with an average of 5.

[Effects of transgenes insertion on pollen vigor and hybrid seed set of rice].

In this paper, the effects of transgenes insertion on the outcross potentiality of rice varieties were assessed by pollen vigor and hybrid seed set. The in vitro pollen germination rates of five transgenic rice lines transformed respectively with bar, crylAb, BADH and Xa21 gene were investigated, and compared with their relative receptor rice varieties. The results showed that there existed a significant difference in in vitro pollen germination rates between receptor rice varieties, but no significant difference was found between transgenic rice varieties and their relative receptors.