Rice SDSFL1 plays a critical role in the regulation of plant structure through the control of different phytohormones and altered cell structure.

Semi-dwarfism is one of the most important agronomic traits for many cereal crops. In the present study, a mutant with semi-dwarf and short flag leaf 1, sdsfl1, was identified and characterized. The sdsfl1 mutant demonstrated some distinguished structural alterations, including shorter plant height and flag leaf length, increased tiller numbers and flag leaf width, and decreased panicle length compared with those of wild type (WT).

CLD1/SRL1 modulates leaf rolling by affecting cell wall formation, epidermis integrity and water homeostasis in rice.

Leaf rolling is considered as one of the most important agronomic traits in rice breeding. It has been previously reported that SEMI-ROLLED LEAF 1 (SRL1) modulates leaf rolling by regulating the formation of bulliform cells in rice (Oryza sativa); however, the regulatory mechanism underlying SRL1 has yet to be further elucidated. Here, we report the functional characterization of a novel leaf-rolling mutant, curled leaf and dwarf 1 (cld1), with multiple morphological defects.

The ferredoxin-dependent glutamate synthase (OsFd-GOGAT) participates in leaf senescence and the nitrogen remobilization in rice.

Ferredoxin-dependent glutamate synthase (Fd-GOGAT, EC 1.4.7.

REL2, A Gene Encoding An Unknown Function Protein which Contains DUF630 and DUF632 Domains Controls Leaf Rolling in Rice.

Background: Rice leaves are important energy source for the whole plant. An optimal structure will be beneficial for rice leaves to capture light energy and exchange gas, thus increasing the yield of rice. Moderate leaf rolling and relatively erect plant architecture may contribute to high yield of rice, but the relevant molecular mechanism remains unclear.

QTL mapping based on the embryo and maternal genetic systems for non-essential amino acids in rapeseed (Brassica napus L.) meal.

Background: Non-essential amino acids are a good source of nitrogen and also very important contributors to the metabolic process. Analysis of quantitative trait locus (QTL) simultaneously located on the amphidiploid embryo and maternal plant nuclear genomes for non-essential amino acid contents in rapeseed meal across different environments was conducive to further clarify the genetic mechanism of seed quality traits.

Results: Twenty-eight QTLs associated with arginine (five QTLs), histidine (four QTLs), glutamic acid (three QTLs), glycine (three QTLs), proline (three QTLs), alanine (four QTLs) and aspartic acid (six QTLs) contents were identified in present study.

Differential iron-bioavailability with relation to nutrient compositions in polished rice among selected Chinese genotypes using Caco-2 cell culture model.

Genotypic variation of iron bioavailability and the relationship between iron bioavailability and nutrient composition in polished rice among 11 rice genotypes were assessed using an in vitro digestion/Caco-2 cell model. The results indicated that significant differences in iron bioavailability were detected among tested rice genotypes, with a 3-fold range, suggesting a possibility of selecting high bioavailable iron by plant breeding. Although iron bioavailability was not significantly correlated with Fe concentration in polished rice among tested rice genotypes, the results also indicated that most of the iron dense genotypes showed relatively high ferritin formation in Caco-2 cell and transported iron.

[Morphological characteristics and gene mapping of a novel bent pedicel branch (bpb1) mutant in rice].

Rice pedicels are tightly associated with the yield of grain. In the present study, a novel and stable pedicel mutant bpb1 (bent pedicel branch 1) was obtained from the wild type "Zhenong 7" after 60Co γ-ray treatment. The mutant had the typical phenotype of bent pedicel branches with multiple abnormal phenotypes, such as longer pedicels, short panicles, and dwarfism.

[Promotion of tuition quality in Genetics by developing an excellent instructional system].

This article, which is based on the requirements for developing the course of Genetics as an outstanding course, summarizes the experience of engendering an excellent instructional system, expatiates on the effects of its application to the teaching process of "Genetics" and next step work for continuing this instructional system. The course quality of "Genetics" has been improved under the excellent instructional system by including different teaching methods, renovating the teaching contents, innovating the teaching means, developing a practical courseware, writing extractive textbooks, reforming experimental teaching, and constructing an instructional network, together with teaching methods related to scientific research.

Mapping of quantitative trait loci for oil content in cottonseed kernel.

Oil content in cottonseed is a major quality trait which when improved through breeding could enhance the competitiveness of cottonseed oil among other vegetable oils. Cottonseed oil content is a quantitative trait controlled by genes in the tetraploid embryo and tetraploid maternal plant genomes, and the knowledge of quantitative trait loci (QTLs) and the genetic effects related to oil content in both genomes could facilitate the improvement in its quality and quantity. However, till date, QTL mapping and genetic analysis related to this trait in cotton have only been conducted in the tetraploid embryo genome.

[Clinical observation on the origin of antrochoanal polyp].

Objective: To explore the origin and etiopathogenesis of antrochoanal polyp (ACP) based on the clinical data.

Methods: Twenty-six patients with ACP were included in the study. All the ACP patients were documented by preoperative endoscopy and computer tomographic (CT) scans.

[Improving experimental teaching facilities and opening up of laboratories in order to raise experimental teaching quality of genetics].

Advanced teaching facilities and the policy of opening laboratories to students play an important role in raising the quality in the experimental teaching of Genetics. This article introduces the superiority of some advanced instruments and equipment (such as digital microscope mutual laboratory system, flow cytometry, and NIRSystems) in the experimental teaching of genetics, and illustrates with examples the significance of exposing students to experiments in developing their creative consciousness and creative ability. This article also offers some new concepts on the further improvement upon teaching in the laboratory.

Analysis of embryo, cytoplasmic and maternal genetic correlations for seven essential amino acids in rapeseed meal (Brassica napus L.).

Genetic correlations of nutrient quality traits including lysine, methionine, leucine, isoleucine, phenylalanine, valine and threonine contents in rapeseed meal were analysed by the genetic model for quantitative traits of diploid plants using a diallel design with nine parents of Brassica napus L. These results indicated that the genetic correlations of embryo, cytoplasm and/or maternal plant havemade different contribution to total genetic correlations of most pairwise nutrient quality traits. The genetic correlations among the amino acids in rapeseed meal were simultaneously controlled by genetic main correlations and genotype x environment (GE) interaction correlations, especially for the maternal dominance correlations.

[Study on the global and local calibration methods of tryptophan content in rice by near infrared reflectance spectroscopy].

Tryptophan is one of the essential amino acids in human, and also considered as an important limiting amino acid in rice. Alkali hydrolysis method was used to determine the tryptophan content of 272 representative samples selected from the 1 256 samples in four years. Based on the milled rice flour spectroscopy, by comparing the prediction abilities of the equations with global calibrations and local calibration, the global calibration method with MPLS and the local calibration method were better than others.

Detecting relationships between amylose content and amino acid contents of indica rice with conditional approach.

The relationship between the genetic effects of endosperm, cytoplasm and maternal plant on amylose content (AC) and amino acid contents of indica rice was studied using unconditional and conditional analysis methods. The results indicated that the protein content (PC) and brown rice weight (WBR) could significantly affect the relationships between AC and amino acid contents of rice. The phenotypic and genotypic covariances between AC and amino acid contents were most significantly negative under the interference of PC or WBR, but most of the relationships for the paired traits were not significant after excluding the influence of PC or WBR on AC.

[Exploration and practice of inquiring teaching for the experiments of genetics].

Aiming for fostering talents with the sense and ability of creation, the current wave of experimental teaching reform demands significant improvements in genetics. We proposed a train of thoughts about transforming the testing and verifying experiments of genetics into inquiring forms with comprehensive or designing property, and gave some examples to carry out inquiring teaching for the experiments of genetics.

[Compilation and practice for "Genetics" multimedia textbook].

Textbook is an important tool for generating knowledge and is closely related to the teaching effect. Now the multimedia teaching method has become the common norm in teaching process of higher education. This paper describes the compilation of different forms of "Genetics" multimedia textbook, the selection of contents and knowledge, the arrangement of knowledge module and systematic configuration.

[The screening of mutants induced by physical and chemical factors and construction of mutant population for Brassica napus L].

The mature seeds of rapeseed (Brassica napus L.) from variety Gaoyou 605 were treated with g-rays and Ethyl Methan Sulfonate (EMS). 152 mutants (12.

[Creating a software package and improving the multimedia teaching of genetics course].

Multimedia as a pedagogical tool has been widely adopted for improving the quality of teaching. This paper describes the construction of a teaching software package based on the characteristics of the "Genetics" course. It also discusses some particulars of multimedia teaching, the collection of teaching materials, the improvement of teaching effects, and the compilation of a multimedia textbook.

[Study on developing calibration models of fatty acid composition in intact rapeseed by near infrared reflectance spectroscopy].

Four hundred ninety seven rapeseed samples, which feature multi-year, multi-loci and highly variant characteristics, were collected as a raw set. The NIR spectra were pretreated by scatter correction and mathematics treatments, and calibration models of fat acid composition of intact rapeseed were developed by using the algorithm method of modified partial least square (MPLS). Meanwhile, three types of sample cups with different capacity were used to screen the suitable calibration model for rapeseed quality breeding.

[Improvement and optimization for "genetics" course teaching].

"Genetics" is one of the main courses for the study scheme of undergraduate students in university. This paper pointed out some problems found in the teaching process according to the characteristics of "Genetics" course. At the same time, the thought on the construction of "Genetics" course were discussed concerning the reform of course contents, the improvement of teaching method, the creation of teaching CAI (computer assisted instruction), the compile of electronic edition for teaching materials, the evaluation of teaching level, the innovation of experimental contents and the methods for improving the teaching effect.

[Genetic diversity of flue-cured tobacco varieties based on ISSR markers].

Genetic diversity was assessed among 24 flue-cured tobacco varieties by ISSR (inter simple sequence repeats). A total of 100 ISSR primers were used to amplify the DNA from these varieties, of which 10 primers produced reproducible amplified products. Using polyacrylamide gel electrophoresis 208 bands were identified, of which 141 bands were polymorphic among the flue-cured tobacco varieties analyzed.

Morphogenesis and molecular basis on naked seed rice, a novel homeotic mutation of OsMADS1 regulating transcript level of AP3 homologue in rice.

The floral organs are formed from floral meristem with a regular initiation pattern in angiosperm species. Flowers of naked seed rice (nsr) were characterized by the overdeveloped lemma and palea, the transformation of lodicules to palea-/lemma-like organs, the decreased number of stamens and occasionally extra pistils. Some nsr spikelets contained additional floral organs of four whorls and/or abnormal internal florets.

Genetic diversity and population differentiation of Liaoning weedy rice detected by RAPD and SSR markers.

Weedy rice refers to populations of usually annual Oryza species that diminish farmer income through reduction of grain yield and lowered commodity value at harvest. The genetic diversity and population genetic structure of weedy rice in Liaoning Province were studied by RAPD and SSR markers. The results indicate that the level of genetic diversity of Liaoning weedy rice is very low, with polymorphic loci being only 3.

[Establishment of Genic Male Sterile Lines of Brassica napus by Wide Cross and Their Cytology and Morphology.].

One and three male sterile plants were found in the progenies of the intergeneric hybrids by crossing Brassica napus and Brassica juncea to Orychophragmus violaceus, respectively. After interspecific cross and full-sib crosses, four genic male sterile lines were obtained. The results of cytological observations indicated that somatic chromosome number was 38 in all types of sterile lines, which were considered as the type of B.