共查询到20条相似文献，搜索用时 78 毫秒
1.
2.
为筛选出优质、高产、高抗的优质稻品种,加快优质稻新品种更新速度,促进产业发展,特开展本次试验.选择米质达到国标三级以上的15个优质稻品种开展品种筛选比较试验,试验结果表明:所有参试品种产量变化在570.9～775.8 kg/667 m2之间,其中C两优华占、川农优298、中优849、川优6203等6个品种比对照品种表现为增产,增产幅度为2.3％～15.1％;德优4727、成优8319、Y两优585等8个品种比对照表现为减产,减产幅度为2.6％～15.3％.综合各种品种性状,农艺性状较好、高产优质、田间抗逆性较强的C两优华占、川农298、中优849、川优6203共4个适宜在本地区推广种植的高产优质品种. 相似文献
3.
征集近年特别是2015年审定的适宜长江中下游(沿淮)流域长粒、两系杂交籼稻新品种,在常规相同栽培管理条件下,对其产量表现、特征特性(农艺性状、经济性状、综合抗性、稻米品质等)进行田间试验记载及室内考种。结果表明,苏两优295、深两优9310较对照皖稻153增产,可以推广;其他品种均比对照减产,但C两优513、Y两优1928与对照相比减产不显著;综合产量、抗性、稻米品质等因素,C两优513、Y两优1928、科两优889、徽两优898可以作为搭配品种种植。 相似文献
4.
以苏玉糯5号为对照,对11个糯玉米新品种进行区试。试验结果表明,荟甜糯2号表现优异,浙白糯702连续两年区试产量明显高于对照,建议这两个品种参加生产试验;荟甜糯3号、珍珍糯555、花甜糯1号、闽黑糯1号、闽甜糯5号、京甜糯366、雪甜糯321等7个品种综合性状好,产量增幅较大,建议继续参加第二年区试;珍早甜糯56、梦甜糯858产量比对照减产,建议退出区试。 相似文献
5.
为稳定粮食安全,建立遵义市水稻超高产栽培技术体系,实现连片示范单产的新突破,品种选用是关键。筛选结果为:科优21产量最高,达790.87 kg/667 m2,金优785居第2位,比对照增产1.93%,贵香优5号居第4位,比对照减产6.84%,Ⅱ优602比对照减产8.15%,居第5位;Q优6号产量最低,比对照减产10.5%;6个品种在千粒重、结实率、成穗率及抗稻瘟病方面具有较高品种优势,除贵香优5号还需在遵义市进一步的试验、示范外,其余5个品种均适宜在遵义市与试验区生态条件相同的地区示范推广。 相似文献
6.
引进杂交水稻新品种D优13、协优527、洪优4号、冈优615、Ⅱ优602、321AX1-11R、Ⅱ优明86、富优1号、川香优2号、金优182、汕优63(ck)在赤水市海拔320m地区进行对比试验种植,产量536.5～581kg/667m2的8个品种,比对照汕优63品种513.4kg/667m2增产4.5%～13.17%,比对照减产的有两个品种,减产2.82%和7.1%.3月7日播种,8月9～14日成熟,生育期155～160d,各品种生长势正常,属中籼迟熟品种,适宜赤水低海拔地区种植. 相似文献
7.
水稻新品种引种试验示范初报 总被引：1，自引：0，他引：1
2018年黔东南州农业科学院引进7个杂交水稻新品种,进行大田生产试验,综合评价各品种在黄平县种植的丰产性、稳产性、适应性,以期筛选出适宜在当地种植的水稻新品种。结果表明:各参试品种单产均高于F优498(ck),其中恒丰优426、陵优2749分别比对照增产13.99%、10.74%,生育期适中,株型紧凑,综合表现好,建议在本区域内大面积推广;金优321比对照增产14.31%,株型紧凑,综合表现好,缺点是生育期偏长,可在700~800m海拔区域推广;宜香2239、泸优578分别比对照F优498增产8.89%、6.12%,两者生育期偏长,株型好,可在下一年继续种植,进一步观察;扬优香占、Y两优粤禾丝苗分别比对照增产2.33%、1.08%,增产效果不明显,且两者生育期偏长,株型较差,不建议示范推广。 相似文献
8.
9.
为筛选适宜玉屏县生产应用的优质杂交稻新品种,于2019年开展了宜香1988、晶两优534、Y两优957、荃优3301、粤禾丝苗、兆优5455、渝香203等7个品种的对比试验。结果表明:粤禾丝苗比渝香203生育期早5d,Y两优957比渝香203生育期长5d,其他品种与渝香203生育期一致。粤禾丝苗、Y两优957株高较矮,且千粒重较小。实际产量上,荃优3301最高,达549.90kg/667m^2,其次为Y两优957,两品种均显著高于对照品种渝香203,其他品种与对照均无显著差异。在生产实际中,建议使用荃优3301、Y两优957两品种,可获得较高的产量。 相似文献
10.
优质稻新品种引进对比试验初报 总被引：1，自引：0，他引：1
新引进24个晚季杂交水稻新品种在上杭进行大田展示及简比试验,结果表明：Y 两优5867比对照增产21.24%,花2优3301比对照增产15.3%,金农2优3号比对照增产5.96%,以上3个品种在上杭种植田间表现综合性状好,生育期适中,建议进一步扩大示范推广;对川优2189等在当地种植表现较好的9个品种,建议继续示范种植;对泰丰优2098等12个品种在当地种植产量、抗性表现一般,栽培上应根据品种特点,注意防虫防病。对参试品种生育期、经济性状、抗逆性等进行了评述。 相似文献
11.
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
12.
13.
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
14.
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
15.
株两优０２是湖南亚华种业科学研究院和株州市农科所合作用低温敏两用核不育系株１S与优质早稻父本ZR０２选配而成的两系杂交早稻组合，２００２年３月通过湖南省农作物品种审定委员会审定。１产量表现２０００－２００１年湖南省早稻区试每公顷平均产量７６４７kg，比金优４０２增产１６５kg，日产量６９kg，比金优４０２高１．８kg。２００１年南方稻区早稻区试平均产量７３８４．５kg／hm２，比金优４０２增产３３８．２kg，达极显著水平。２００１－２００２年在湖南、江西、广西等省区示范栽培０．７５万hm２，据各地测产验收平均单… 相似文献
16.
Summary One hundred and thirtysix hybrids were developed utilizing four cytoplasmic genetic male sterile lines (V 20A, Zhen Shan 97A, IR 46829A and IR 46830A) and 34 effective restorers. Heterosis, heterobeltiosis and standard heterosis were found to be significant for grain yield and other yield attributing characters in most of the hybrids. The heterosis for grain yield was mainly due to the significant heterosis for the number of spikelets per panicle, test weight and total dry matter accumulation. Interestingly, it was found that most of the higher yielding hybrids were accompanied by significant negative heterosis for harvest index. Hybrids shorter than the shortest parent and earlier than the earliest parent were not observed; hybrids with intermediate to tall plant height having nonlodging habit could be developed. Eighteen hybrids gave more than 20% grain yield than the standard checks. These were evaluated for their stable and consistent yield performance over four seasons. The results on analysis for stability parameters indicated that the hybrids V 20A × Himdhan and Zhen Shan 97A × Mahsuri were stable over environments. 相似文献
17.
18.
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
19.
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