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应用花培技术选育水稻广亲和恢复系 总被引：7，自引：1，他引：6
选自杂交组合CPSLO17/明恢63的3个花培系（TG7、 TG8和TG11）,与南京11、IR36（籼）,巴里拉、秋光（粳）等广亲和测验种测交F1结实均正常,表现为优良的广亲和性。对珍汕97A、V20A、红突A（野败型）协青早A（矮败型）,D297A（D型）,Ⅱ—32A（印尼水田谷）等籼型和双百A（BT型）,7627A（滇—Ⅰ型）等粳型不同来源的雄 相似文献
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花药培养在水稻籼粳交恢复系选育上的应用 总被引：7，自引：0，他引：7
对6个籼粳单(复)交组合进行花药培养,所获花培后代株系用“三系”不育系与之测交,以鉴定各株系的恢复度及杂种优势。结果表明:120个单交花培株系中有27.50％的株系,35个复交花培株系中有44.00％的株系能使野败型不育系的育性恢复正常;在149个株系配制的“三系”组合的优势鉴定中,有12.08％的组合比对照汕优63增产10-38％;在130个“二系”组合的优势鉴定中,有4％左右的组合比对照汕优63增产18—41％。经与籼梗测验种及“三系”不育系的测交鉴定证实:通过花药培养可以在较短时间内(3-4年)获得性状稳定的新广亲和系和广亲和恢复系。讨论了花药培养技术在水稻籼粳交恢复系选育上的可利用性,及由此而展现了在“三系”或“二系”上逐步实现籼粳亚种间杂种优势利用的前景。 相似文献
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水稻亚种间广亲和性及其酯酶同工酶特点 总被引：1，自引：0，他引：1
通过与籼粳测验种测交，考察了9个待测品种的亲和性表现。结果表明品种Dular、Aus449、0046、CPSL－17、KetanNangka、02428具有广亲和性，水源287可能具有广亲和性。比较广亲和性品种和不具有广亲和性品种的酯酶同工酶，得出所有供试广亲和品种都具有特异酶带9A，某些广亲和性品种具有酶谱的中间型特点。因此，可以将酯酶同工酶9A或中间型酶谱作为筛选广亲和性品种的一个生化指标。 相似文献
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籼粳交加倍单倍体后代性状遗传的研究 总被引：11，自引：0，他引：11
对一个典型的籼/粳组合、窄叶青8号/京系17的F1花药进行培养,所获二倍体花粉植株除约20%自然结实率为0外,其余植株的结实率在1%至正常结实之间,65%株系在75%以上,并稳定地传至自交后代。对130多个加倍单倍体(DH)多种性状的遗传进行了研究与分析,结果表明,花药培养可以克服籼/粳后代包括育性在内的各种性状长期分离不易 相似文献
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An analysis of hybrid sterility in rice using a diallel cross of 21 parents involving indica, japonica and wide compatibility varieties 总被引：3，自引：0，他引：3
Summary There is much interest in the inter-varietal fertility of Asian cultivated rice. In this study, we analyzed the fertility of hybrids in a diallel set of 210 crosses involving 21 parents representing a broad range of the cultivated rice germplasm including landraces, primitive cultivars, modern elite cultivars and parents of hybrid rice. The materials were also carefully selected with respect to indica-japonica classification including typical indica/japonica, more or less intermediate and wide compatibility varieties. The level of hybrid fertility varied widely among the crosses from almost completely sterile to fully fertile. In general, hybrid fertility of intra-subspecific crosses, i.e., indica by indica (I×I) and japonica by japonica (J×J), is much higher than inter-subspecific crosses (I×J or J×I). The fertility varied widely in hybrids involving wide compatibility varieties and also in inter-subspecific crosses not involving wide compatibility varieties. An analysis of variance showed that both the main effects of indica and japonica parents and the interaction between the parents are highly significant in determining hybrid fertility. We speculate that, in addition to wide compatibility, the overall genetic difference between the indica and japonica parents, that may involve a series of minor mutations, play an important role in determining the hybrid fertility. There are also genes of sizable effect that influence fertility in hybrids resulting from specific combinations of the parents.Abbreviations I×I
indica by indica cross
- I×J
indica by japonica cross
- J×I
japonica by indica cross
- J×J
japonica by japonica cross
- WCV
wide compatibility variety 相似文献
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水稻籼粳亚种间杂种不育性的研究进展 总被引：1，自引：0，他引：1
克服杂种不育性是利用籼粳亚种间杂种优势的关键。由此对水稻亚种间杂种不育性的原因、细胞学基础及两种主要基因遗传模式进行了总结,并详细综述了利用“亲和基因”克服籼粳杂种不育性的两种有代表性的学说-广亲和基因和特异亲和基因分子定位的最新研究进展,并提出了两“亲和基因”共同利用的初步设想:将聚合了Si等位基因的粳型亲籼系与聚合了不同广亲和基因(中性亲和基因的广亲和力强、亲和谱广泛的粳型品种进行杂交和回交,选育出聚合不同广亲和基因和Si等位基因的粳型亲籼系,再与籼稻品种杂交,真正实现直接利用籼粳亚种间杂种优势。 相似文献
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A genetic analysis of low-temperature-sensitive sterility in indica-japonica rice hybrids 总被引：9，自引：0，他引：9
Low-temperature-sensitive sterility has become one of the major obstacles in indica–japonica hybrid rice breeding. The objectives of this paper were to evaluate the extent of the fertility reduction and to determine the genetic basis of low-temperature-sensitive sterility. Seventeen varieties were crossed in various ways to produce 21 F1s including 16 indica-japonica hybrids. Fertility of the F1s and their parents was examined under both high and low temperature conditions. Considerable reduction in spikelet fertility was observed under low-temperature conditions in the majority of the indica–japonica hybrids having at least one wide compatibility parent. However, the extent of fertility reduction varied greatly, depending on the parental genotypes. Data from five pairs of reciprocal crosses indicated that the cytoplasm had no effect on fertility reduction. The more-or-less bimodal distribution of the fertility segregation of one BC1F1 and two F2: populations under low-temperature conditions suggested that the low-temperature-sensitive sterility was controlled by only one or a few genes. It was also shown that the low-temperature-sensitivity is not related to wide compatibility. We conclude that it is possible to develop indica-japonica hybrids with wide compatibility and also insensitivity to the low-temperature conditions. 相似文献
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Yang Zhuping 《Euphytica》1997,95(3):253-258
Following anther culture of various F1 hybrids of indica restorer (R) lines/wide compatible varieties (WCVs) and japonica R lines/WCVs, the homozygous diploid plants
(2n) generated were test-crossed with indica WA type cytoplasmic-genetic male sterile (CMS) line Zhanshan 97A (WA), indica
testers Nanjing 11 and Nante, japonica BT CMS line Hanfeng A (BT), and japonica testers Balilla and Akihikari to identify
widely compatible restorer lines. The results of this study showed that among the diploid pollen plants generated from F1 hybrids of indica R lines/WCVs, 36.7% and 64.7% possessed normal fertility restoration ability (rate of seed-setting > 80%)
to Hanfeng A and Zhanshan 97A, respectively. 71.3% and 32.3% had normal fertility restoration ability to Hanfeng A and Zhanshan
97A, respectively, in diploid pollen plants derived from the japonica R lines/WCVs F1's anther culture. Several widely compatible R lines were selected from anther culture of F1 hybrids of indica R lines/WCVs and japonica R lines/WCVs. These widely compatible R lines derived from diploid pollen plants
showed good wide compatibility and restoration ability both to WA and BT type CMS lines. Strong standard heterosis of major
agronomic traits and yield traits was observed in F1 test-crosses of widely compatible R lines with Hanfeng A and Zhanshan 97A. The wide compatibility in widely compatible R
lines H17, H158 and H281 was studied by a set of three-way crosses. Segregation of the fertile plants with seed-setting rate
> 70% and semi-fertile plants with seed-setting rate > 69.9% agreed with a ratio of 1:1, indicating that wide compatibility
in these widely compatible R lines is governed by a pair of major genes.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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广亲和基因的发现,克服了籼粳交杂种不育的矛盾,但杂种后代株高过高、抽穗期延迟等问题仍然限制着籼粳亚种间杂种优势的利用。本试验利用一个籼粳交(珍汕97/武育粳2号)双单倍体群体(doublehaploidpopulation,DH系)及其分别与两亲本回交构建的两个回交群体,考查了株高和抽穗期的遗传,将三个群体的表型值和两个回交群体的中亲优势值进行了数量性状位点(quantitativetraitlocus,QTL)检测及效应分析,并对结果进行了比较。2个性状在3个相关群体中一共检测到了21个主效QTL和10个上位性QTL,主效QTL的数目和贡献率都比上位性QTL大,而且,在10个上位性QTL中,发生在2个主效QTL间的互作有3个,主效QTL与背景位点间的互作有6个,2个互补位点间的互作仅有1个,进一步说明了主效QTL在株高和抽穗期遗传中的重要作用。比较加性和非加性QTL的作用,发现加性效应、显性效应和上位性效应是籼粳亚种间杂种株高和生育期变化的共同遗传基础。 相似文献
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Significant differences of callus induction, green plant regeneration and culture efficiency were observed among restorer lines and their hybrids in rice. Average callus induction percentage of F1, hybrids was about twice that of their parents. Twenty doubled haploid (DH) lines that showed normal fertility with both indica and japonica CMS lines, were selected as widely compatible restorers (WCRs). TG8 derived from CPSLO17/Minghui 63 not only showed normal fertility to both indica and japonica test varieties and CMS lines, but also exhibited superior agronomic traits, in particular short plant, desired plant type, high tillerability, large panicles, good grain quality and resistance to rice blast disease. Strong heterosis for yield was observed in crosses between indica or japonica CMS lines and TG8. TG8 possessed a dominant, widely compatible gene (WCG) that was inherited from the variety CPSLO17. Results confirmed that the anther culture technique is a quick and effective way of developing widely compatible restorers in rice and that it is applicable to the direct use of intersubspecific heterosis with the three-line method. 相似文献
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水稻籼粳亚种间杂种优势利用研究进展 总被引：35，自引：3，他引：35
本文从水稻育种进步的宏观观点，回顾与展望了我国水稻杂种优势利用的历史进程，由早期追求以强大生物优势为主要育种目标的启蒙阶段进入三系法生态远缘优势与理想株型相结合的籼梗杂种优势间接利用阶段，实现了水稻杂种优势利用的第一次飞跃。现在又进入三系法、两系法籼粳有利基因交换与自由配组的籼梗杂种优势直接利用阶段，预期将产生水稻杂种优势利用的第二次飞跃，近年研究表明，双亲遗传距离与经济优势呈二次多项式关系，杂种 相似文献