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凤稻19号系云南省大理州农科所通过鹤16/86-167//合系35号复合杂交选育而成的高海拔粳稻新品种。在品比,省、州区试及生产示范中表现具早熟、耐寒、高产、稳产、品质好等优点。2006年12月通过云南省农作物品种审定委员会审定。 相似文献
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双朝25号是广东省农科院水稻所用双桂36与抗2杂交选育成的籼稻新品种,1990年通过广东省农作物品种审定委员会审定并推荐参加南方稻区良种区域试验,最近被农业部列为全国重点扩繁的籼稻品种。本文根据双朝25号参加1990年南方稻区良种区试及生产示范试验资料,对其在南方稻区的种性表现、应用前景和高产途径进行分析、评价和探讨,为在南方稻区扩大种植和夺取高产提供参考。一、材料与方法 1.参试品种及来历:桂朝2号(ck)和双朝25号(广东农科院水稻所)、中育87—1(中国水稻所)、湘中籼2号(湖南省水稻所)、育425(贵州 相似文献
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国际水稻所水稻种质中心(IRGC)自1960年成立以来,进行了广泛的水稻种质资源收集、保存、研究、分发和利用。迄今为止,共收集了83000多份稻种资源,分长、中、短三期贮藏于种质库中,并系统地进行了水 相似文献
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本刊讯 1月29日～2月2日,由云南省农业厅、云南省花卉产业办公室等8家单位共同主办的“2010年中国大理第三届国际兰花茶花博览会”在阳光明媚的云南大理白族自冶州隆重举办。来自韩国、日本、印尼等国家以及省内外各州市的145家展商展出了近5万盆兰花、茶花。 相似文献
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Kenneth A. Gravois 《Euphytica》1998,101(2):151-156
High rough rice yields are important for the profitable production of rice (Oryza sativa L.). The value of rough rice is determined
primarily by head rice (whole milled grains) and broken rice, together referred to as total milled rice. The objective of
this study was to optimize selection for rough rice yield, head rice, and total milled rice using path-coefficient analysis
and selection indices. Thirty-seven long grain pure lines were grown in an experiment at three Arkansas locations during 1993
and 1994. In another test, twenty-eight F1 hybrids obtained from an eight-parent half diallel of long-grain rices were grown at two locations in Arkansas during 1991.
For the pure lines, path analysis revealed that rough rice yield was approximately twice as important in determining total
milled rice/ha than head rice. Path analysis for the hybrids revealed that rough rice yield was an even greater component
in determining total milled rice/ha. Based on yield components for hybrid rice, panicle density had the largest direct effect
determining total milled rice/ha. Filled grain/panicle, grain weight, and head rice, in that order, were secondary, but positive,
factors determining total milled rice/ha. A selection index for pure lines based only on selection for head rice was 19.2
percent as effective as selection for total milled rice/ha directly. When selection for total milled rice/ha was based solely
on rough rice yield, selection was 82.7 percent as effective as selecting for total milled rice/ha directly. Selection to
improve total milled rice/ha should concentrate on increasing both rough rice yield and head rice. Rough rice yield should
receive greater priority than head rice in selection strategies.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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水稻种质资源是育种的物质基础。水稻育种要在米质、产量、抗性上有新的突破,除了有新的育种技术外,还要有丰富的遗传资源。国际水稻遗传评价试验网(INGER)的参试材料集中了世界上主要产稻国家和国际研究机构提供的优良种质,来源广泛,遗传基础丰富。广西农科院从1980年起,参加由国际水稻研究所协调的国际水稻遗传评价试验网的国际合作研究工作,到2002年累计从各试验圃获得试验材料15890份,大大丰富了广西水稻新品种选育的物质基础,经试验评价,筛选出一批高产、优质和恢复源种质材料提供育种利用,并育成一批高产、优质、抗病的优良水稻品种… 相似文献
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Analysis of Vietnamese rice germplasm provides an insight into Japonica rice differentiation 总被引：4，自引：0，他引：4
Genetic differentiation among landraces of rice in northern Vietnam that lie in the centre of genetic diversity of Asian cultivated rice was analysed using DNA markers, and morphological and physiological traits to obtain an insight into the genetic differentiation of Asian rice. Principle coordinate analysis, based on nuclear RFLP data, divided Vietnamese rice varieties into three groups, designated A, B and C. Chloroplast DNA variation discriminated group A, which corresponded to the Indica rice varieties, from both groups B and C, which corresponded to the Japonica rice varieties. Physiological characteristics for Indica‐Japonica and tropical‐temperate Japonica discrimination suggested groups A and B consisted of typical Indica and Japonica varieties, respectively, while the characteristics of group C were distinct from those of the other two groups. This suggests that the genetic differences between groups B and C represent a new aspect of genetic variation that has not been previously reported in Japonica rice. Groups C and B corresponded with upland and lowland rice, respectively. Eight marker loci were associated with upland‐lowland differentiation in Japonica rice. Highlighted chromosomal regions might have been selected during the history of cultivation under different cultural conditions, and thus contain genes related to adaptation. 相似文献
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Areum Chun Jin Song Kee-Jong Kim Ho-Jin Lee 《Journal of Crop Science and Biotechnology》2009,12(4):239-244
Chalk, an opaque area in the rice grain, is an important quality characteristic in rice and occurs most commonly when grains
are exposed to high temperatures during development. Chalky rice decreases the value of rice because of its undesirable appearance
and eating quality for consumers. We investigated the chemical composition, morphological structure, cooking, texture properties
of cooked rice, and pasting and gelatinization properties to evaluate the reason for the deterioration in eating quality of
chalky rice. 相似文献
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Hajime Goto Noriyuki Asanome Keitaro Suzuki Tomoyoshi Sano Hiroshi Saito Yohei Abe Masaru Chuba Takeshi Nishio 《Breeding Science》2014,63(5):489-494
The whiteness of cooked rice and rice cakes was evaluated using a portable spectrophotometer with a whiteness index (WI). Also, by using boiled rice for measurement of Mido values by Mido Meter, it was possible to infer the whiteness of cooked rice without rice cooking. In the analysis of varietal differences of cooked rice, ‘Tsuyahime’, ‘Koshihikari’ and ‘Koshinokaori’ showed high whiteness, while ‘Satonoyuki’ had inferior whiteness. The whiteness of rice cakes made from ‘Koyukimochi’ and ‘Dewanomochi’ was higher than the whiteness of those made from ‘Himenomochi’ and ‘Koganemochi’. While there was a significant correlation (r = 0.84) between WI values and whiteness scores of cooked rice by the sensory test, no correlation was detected between the whiteness scores and Mido values, indicating that the values obtained by a spectrophotometer differ from those obtained by a Mido Meter. Thus, a spectrophotometer may be a novel device for measurement of rice eating quality. 相似文献
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Rice stripe is the most serious virus disease in temperate rice-growing countries. The most economical and environmentally
safe practice for controlling this disease is virus-resistant cultivars. ‘BL 1’ is an elite germplasm line with the blast
resistance gene Pib, and has been used as a differential line for testing the pathogenicity of the blast fungus. We found that certain progenies
from BL 1 showed resistance to both blast and rice stripe virus (RSV). The objectives of this study were to evaluate the RSV
resistance in the field and under artificial conditions, to assess the reaction to the insect vector(small brown plant hopper,
SBPH), and to examine its inheritance and its relationship to blast resistance in BL 1.BL 1 was susceptible to SBPH, but resistant
to RSV in field and artificial inoculation tests. The inheritance of RSV resistance in F3 lines from the cross Nipponbare (NPB)/BL 1 was studied using artificial inoculation with a population of viruliferous SBPH.
A serological assay for RSV infection using an enzyme-linked immunosorbent assay (ELISA) was used. RSV resistance in BL 1
was controlled by a single major gene with incomplete dominance. The locus responsible for RSV resistance was genetically
independent of the blast resistance gene Pib. The resistance gene for RSV infection in BL 1 was also independent of Stvb-i, a gene widely distributed in resistant Japanese cultivars. Resistance to RSV must be diversified in rice cultivars considering
the potential for future emergence of new RSV strains. The new resistance gene identified in BL 1, which has improved plant
type and blast resistance, is considered useful for breeding RSV-resistant cultivars in japonica rice.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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Atitaya Chumpol Sompong Chankaew Suwita Saepaisan Tidarat Monkham Jirawat Sanitchon 《Euphytica》2018,214(10):183
Upland rice production plays an important role in both household consumption and crop rotation. Until now, a blast resistant upland variety has not been released in Thailand. The bimodal pattern of rain distribution in Thailand’s upland rice production areas create a favorable environment for the outbreak of leaf blast when seedling-tillering, and neck blast within the heading stage. The use of genetically resistant cultivars has proven to be an effective way to cope with this problem. In this study, 256 indigenous upland rice plants were screened for blast resistance under greenhouse and field conditions. Ten indigenous upland rice varieties, ULR292, ULR242, ULR219, ULR162, ULR161, ULR134, ULR109, ULR098, ULR081, and ULR066, were identified as resistant to leaf blast disease in both natural infection and artificial inoculation, under greenhouse conditions. Additionally, six of the ten varieties, ULR162, ULR161, ULR134, ULR109, ULR098, and ULR081, were found to be resistant to neck blast under field conditions. These new sources of blast resistance identified from indigenous upland rice varieties proved more resistant than the check varieties, depicting their potential for further use in Thailand’s rice blast resistance improvement program. 相似文献
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Inheritance of scent in rice 总被引：15，自引：0，他引：15
C. V. Dhulappanavar 《Euphytica》1976,25(1):659-662
Summary Inheritance of scent in rice and its association with pigmented characters were studied in T-141 × K-44-1. Four complementary genes appeared to control scent, one of them showing linkage with a complementary gene for glume colour and a supplementary gene for red pigment in apiculus. This group formed part of V (Prp)linkage group of Misro et al. (1966) in which case Pg and P were additions.Pl.480 Project on linkage maps in rice. 相似文献
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以近几年主栽的水稻品种为试材,采取相关统计分析和对比试验等方法,研究了水稻品种对早粳稻米品质的影响,旨在为寒地稻作区优质米品种的选育和高产栽培提供理论依据和技术支持。研究取得如下主要结果：（1）不同熟期碾米品质的3项指标中,糙米率的平均值分别为83.1%、82.9%、83.1%、83.0%;精米率的平均值分别为71.9%、71.9%、72.0%、73.0%。不同品种的糙米率,不同熟期间差异很小,晚熟品种的精米率略高于早熟和中熟品种,品种间表现有差异。不同熟期的整精米率的平均值分别为61.7%、61.7%、66.5%、67.2%,晚熟品种比早熟和中熟品种高,品种间差异较大。早熟和中熟品种的整精米率变异系数较晚熟品种增加1.2个百分点,说明品种间差异较大。稻米垩白米率与胶稠度（0.0566）呈正相关,这一点与（李雅娟,1995）的研究结果一致。垩白米率与精米率（-0.4827）呈显著负相关,因此,在育种上筛选垩白米率低的种质资源是关键。（2）直链淀粉含量是影响稻米食味品质的最重要指标之一,很多研究认为,直链淀粉含量偏高影响稻米食味品质（佐佐木忠雄,等．1982）。关于直链淀粉含量姬田正美（1996）研究认为,直链淀粉含量越高,稻米食味越差。本研究结果直链淀粉含量一般在16.67%~22.40%,平均含量为18.8%,品种间差异较大。直链淀粉含量与蛋白质含量（-0.8207）呈极显著负相关。 相似文献