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How to Prevent Sand-Shelled and Soft-Shelled Eggs in Three-Lined Box Turtles
Three-lined box turtles mate and fertilize in March-April each year, and lay and incubate eggs from May to July. A single sexually mature female turtle lays 3-9 eggs per year; the three-lined box turtle has a relatively low egg production among turtles. Improper feeding and management or the influence of other factors can also cause some three-lined box turtles to lay 1-2 eggs, or even a whole clutch, of sand-shelled eggs (with a sandy, non-smooth shell surface) or soft-shelled eggs, affecting the hatch rate and causing certain economic losses to three-lined box turtle farming. 1 Causes of three-lined box turtles laying sand-shelled or soft-shelled eggs a) Lack of eggshell-producing
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Guangxi Takes the Lead in Breeding an Aromatic Red Rice CMS Line
Recently, the Science and Technology Department of Guangxi Autonomous Region organized relevant experts to conduct a field technical appraisal of the wild-abortive type CMS line Betel Nut Red A, bred by the Xiangzhou Huang Family Rice Research Institute. After rigorous field investigation and indoor microscopic examination, and after hearing the breeder's technical report and questions and answers, the expert group determined that Betel Nut Red A meets the standards for a rice CMS line. It is the first aromatic red rice CMS line bred in China, with strong innovation. Betel Nut Red A has stable agronomic traits, stable male sterility, good flowering habits, relatively good grain quality, and a resistance level of highly susceptible.
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Purple-marked rice male sterile lines developed in Guangxi
The rice male sterile lines carrying the purple-leaf marker trait, Xianhong A and Zhihong A, developed by the research team led by Guangxi Outstanding Expert Researcher Liang Shirong and Guangxi Academy of Agricultural Sciences Vice President Researcher Deng Guofu, passed the field technical appraisal organized by the office of the Guangxi Regional Crop Variety Approval Committee and conducted by a relevant expert group on August 3, 2007. After strict field investigation and indoor microscopic examination, and after hearing the research team's technical report and answers to questions, the expert group unanimously concluded that Xianhong A and Zhihong A have stable agronomic traits, stable male sterility, and good flowering
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Prevention Methods for the Decline in Laying Rate of Laying Ducks in Early Winter
"Daodan" (laying stop) in laying ducks refers to mother ducks raised in spring entering the laying period in November, when the temperature gradually turns colder and the temperature difference between day and night is too large, or due to insufficient nutrition, causing ducks that have just started laying to stop production and "take a vacation." If laying ducks "daodan" and begin molting, once they molt they will not lay eggs again until the following spring. If duck "daodan" can be controlled during this period, the laying period can be greatly extended and the economic benefits of raising ducks can be increased. When the ducks show signs of "daodan" such as eggs becoming smaller, eggshells becoming thinner, delayed laying time, wet feathers after coming ashore from drinking water, and burrowing into the duck house
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High-quality rice male sterile line successfully bred in Fujian
The provincial key science and technology project undertaken by the Fujian Academy of Agricultural Sciences (Tel: 0591-7884771) - the breeding of the rice male sterile line Jingfu 4A, passed the technical appraisal organized by the Fujian Provincial Department of Science and Technology on June 28, 2004. Jingfu 4A has an early maturity period, stable plant and leaf morphology and male sterility traits, and excellent quality, especially outstanding milling quality and appearance quality, good flowering habits, a high stigma exsertion rate, and the combinations it produces show strong field performance advantages. Its milled rice rate, head rice rate, chalky grain rate, chalkiness degree, transparency,
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Key Techniques for Water-Saving Cotton Cultivation in Semi-Arid Saline-Alkali Land
Cotton has always been an important economic crop, and continuously improving cotton yield and quality is of great significance for increasing agricultural efficiency and farmers' income. Over the years, through gradual exploration, a relatively complete set of cotton cultivation techniques for semi-arid saline-alkali land has been developed, achieving the goals of early maturity, high yield, and high quality in drought-resistant cotton planting. This has solved the problems of difficult emergence, difficult seedling retention, slow development, and late maturity when planting cotton in saline-alkali land due to lack of water resources. The cotton yield-increasing techniques for semi-arid saline-alkali land mainly include seed preparation, fertilization, chemical control, pruning, and other steps.
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Chongqing Yurong No. 1 Pig Composite Line Successfully Passes Expert Review
The "Yurong No. 1 Pig Composite Line," independently bred by Chongqing, was recently successfully developed and smoothly passed expert review by the National Livestock and Poultry Breed Approval Committee of the Ministry of Agriculture. According to the Chongqing Municipal Science and Technology Commission, the Chongqing Academy of Animal Sciences utilized the excellent characteristics of a superior local pig breed - the Rongchang pig - combined with the advantages of exotic pig breeds, adopted a three-line composite model, and applied new breeding technologies such as conventional selection along with molecular genetics and information technology. After 9 years of arduous research, they bred a composite line pig with excellent meat quality, strong adaptability, good reproductive performance, moderate lean meat percentage, and strong market competitiveness.
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Introduction to the Extra-Late Ripening Peach New Line 'Jiuyue Hongcui'
'Jiuyue Hongcui' (tentative name) is an extra-late ripening new peach line discovered in 2005 by the Luoyang Institute of Landscape Science in Henan Province during a survey of fruit tree resources. (1) Botanical characteristics: The tree habit is semi-spreading; one-year-old branches are dark red on the sunny side and green on the shaded side. New shoots are light green with a red blush on the sunny side. Leaves are green, relatively large, with a flat blade, a light green midrib, and rounded-obtuse serrations along the margin. Flower buds are plump and conical; the corolla is pink, and pollen production is abundant. (2) Main fruit traits: The fruit is nearly round, with an average
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Tea plant sexual-line breeding methods and key technical points
A breeding method in which sexual progeny of tea plants are produced through the union of male and female gametes and, after selection, new cultivars are developed. The cultivars developed are called sexual-line cultivars. The methods are: 1. Selection of superior individual plants or types: according to the breeding objectives, carry out individual plant selection or group selection from the original material nursery or production tea gardens; 2. Seed collection and seedling raising: for the initially selected individual plants or groups, separately reserve and collect seeds, and raise seedlings separately by line, carrying out identification of seedling-stage traits and cultivar purity; 3. Family or group comparative trials: arrange comparative trials of the selected families or groups together with control
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Screening of 8 New Virus-Free Potato Lines
1 Materials and Methods 1.1 Experimental Materials A total of 9 new virus-free potato lines were used in the test, all introduced from the Bijie Region Potato Breeding and Virus-Free Center. Their line numbers were: B9904-2, B9904-1, B9901-33, B9911-1, B9911-3, B9907-4, B9910-9, BP26, and Mira (CK). 1.2 Experimental Methods The test was conducted on the contracted land of farmer Chen Guangyi in Fengshan Village, Fengshan Township, Dafang County,
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