Various approaches have been used to improve the performance of adapted indigenous stock, including cross-breeding and upgrading through back-crossing with improved breeds, and within-line selection.
已有多种方法被用于提高地方良种的性能，包括杂交育种，以及通过与良种的回交和品系内选育进行的品种改良。
The team is now doing field tests. The first breeding line is expected to be released next year for use by private seed companies and public soybean breeders.
干旱小组目前正在做田间试验。第一繁育系预期在明年发布，仅为私人种子公司和公共大豆育种者使用。
Using this technology, the purity problem during seed production in three-line, two-line or chemical-emasculated hybrid rice breeding system could be solved and some new combinations could be bred.
利用这项技术可望解决三系、两系或化学杀雄杂交稻制种过程中出现的纯度问题，且有利于新杂交稻组合的选育。
The remarkable successes on research and breeding of two line hybrid rice in China are introduced.
介绍了全国近年来两系杂交水稻研究和育种的重要进展。
The paper introduces the Hsien rice restoring line Chen R92-225 breeding by allomixis and irradiation methods, the characteristic and application of Hsien rice restoring line Chen R92-225.
本文介绍了籼型恢复系郴R92-225的杂交和辐射选育过程、特征特性及配制杂交组合应用于生产的情况。
At that time, a few foresighted men began line breeding and inbreeding with the hopes of establishing a new draft breed.
当时，一些富有远见的男人开始行繁殖和近亲繁殖，与建立一个新的草案品种的希望。
The high-yield and high-quality in erect panicle type Japonica line could be selected by anther culture or group selective breeding.
通过花培和组群筛选法均能较快地获得直穗型高产优质粳稻品系。
This paper briefly looks back on the breeding history of three line hybrid rice and reviewed its breeding experience. The reason that hybrid wheat studies lag behind hybrid rice is analyzed.
简要回顾了我国三系杂交水稻的育种历程，重温了其育种经验，分析了杂交小麦研究落后于杂交水稻的原因。
Finally some related issues were discussed on cultivars (line) identification of strip-rust resistance, breeding for resistance to yellow rust and application of current cultivars.
并针对本研究结果对今后品种抗条锈鉴定、抗锈育种及现有品种的生产应用所涉及的有关问题进行了探讨。
The breeding process, characteristics, flowering habit and combining application of large-panicle indica CMS line "Jingfu 1a" were introduced in this paper.
介绍了大穗型籼稻不育系“京福1a”的选育经过、特征特性、开花习性及配组应用表现。
We obtain haploid by isolated microspore culture, and the pure-line is very useful in Purple Flowering Stalks breeding.
利用游离小孢子培养技术获得单倍体，所获纯合系在育种上有较高利用价值。
The traditional line selection and cross breeding is one of the most effective ways to cultivate improved varieties.
传统的家系选择和杂交育种是培育优良品种最有效的方法之一。
Through utilization Research of corn inbred line he 344 to prove that he 344 plays a vital role in the medium and late maturate corn breeding in Heilongjiang Province.
通过对玉米自交系合344的利用研究，证明合344对黑龙江省中早熟玉米育种起着极为重要的作用。
On line dyadic selective breeding water share checks an instrument.
选配在线式水份检测仪。
It is differ both from the method of "circulate line selection" for seed reproduction and from the method of "pure line breeding" for varieties development.
该方法既区别于单纯生产原种的“株系循环法”，也区别于选育新品种的纯系育种法。
These loci might be used as assistant markers for early selection in line breeding of ultra-fine wool sheep from Alpine type Chinese Merino.
部分位点可为中国美利奴高山型超细品系培育的早期选种提供辅助依据。
It is a good sterile line for breeding of quality hybrid rape varieties with yellow peel.
是开展黄籽优质杂交油菜育种的优良不育系。
The paper introduces the breeding methods of the homozygous two-type line, temporary maintainer line and complete sterile line with a recessive epistasis nuclear male sterile.
对甘蓝型油菜隐性上位细胞核雄性不育纯合两型系、临保系和全不育系的转育方法进行了介绍。
That finding will directly provide breeding resource for application of "three-line hybrid" and "two-line hybrid" in soybean, which will make hybrid soybean come in market cosmically.
柱头外露的基因型明显的表现为长柱头、长花柱和长粒型。该研究为大豆“三系”和“两系”的直接利用提供育种资源，促使杂交大豆走向大规模商业化。
The first breeding line is expected to be released next year for use by private seed companies and public soybean breeders.
第一繁育系预计在明年发布，仅供私人种子公司和公共大豆种植者使用。
At the same time, several strategies, i. e. combining gene engineering with conventional breeding, taking improvement of maintainer line for the focal point of good-quality gene...
同时提出基因工程育种与常规育种紧密结合，优质基因工程着重改良保持系及聚合转基因等策略，以培育出超高产优质抗病虫转基因聚合杂交稻新组合。
The rainbow trout embryo cell line medium cultured by the serum-free rainbow trout embryo cell line medium of the invention has the advantages of rapid breeding speed and long regenerating cycle.
本发明无血清虹鳟胚胎细胞系培 养基培养虹鳟胚胎细胞系具有增殖速度快，传代时间长的优点。
This photosensitive male sterility (PGMS) line produced by the expression of antisense-OsPDCD5 could be applied in production of hybrid rice using two-line breeding system.
这个通过基因工程的方法获得的光敏雄性不育系可应用到“两系法”育种中，用以生产杂交水稻。
This photosensitive male sterility (PGMS) line produced by the expression of antisense-OsPDCD5 could be applied in production of hybrid rice using two-line breeding system.
这个通过基因工程的方法获得的光敏雄性不育系可应用到“两系法”育种中，用以生产杂交水稻。
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