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Chlorophyll contents are one of important physiological traits, which affect photosynthesis in plants. There were significant differences in chlorophyll contents between Zhaiyeqing 8(ZYQ 8), an indica variety and Jingxi 17(JX 17), a japonica variety (Table 1). In 117 DH lines of the cross of ZYQ 8/ JX 17, these parameters distributed conTwo neutral alleles of improving male gamete abortion in indica-japonica hybrid rice LU Chuangen and ZOU Jiangshi, Jiangsu Acad of Agri Sci, Nanjing 210014, China 相似文献
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相同遗传背景下7 8与17 18亚基对小麦理化品质的影响 总被引：2，自引：1，他引：2
为准确研究不同高分子量麦谷蛋白亚基（HMW-GS）对小麦品质的贡献，消除因取材不同对结果的影响，用甘春20号（1，7＋8，5＋10）和永良4号（1，17＋18，5＋10）分别进行正、反交，使其杂种后代间具有相同的遗传背景，在杂种F3代选择只有7＋8亚基和17＋18亚基差异的单株，对两种类型籽粒的理化品质进行了分析。结果表明，对于蛋白质含量、灰分含量、沉淀值、面筋含量和降落数值，7＋8亚基和17＋18亚基的贡献无明显差别，亚基效应为7＋8=17＋18；对于颗粒度和面筋指数，7＋8亚基的贡献明显大于17＋18亚基，差异达到极显著水平，亚基效应为7＋8〉17＋18；对于出粉率，17＋18亚基的贡献明显大于7＋8亚基，亚基效应为7＋8〈17＋18，差异也达到极显著水平。 相似文献
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种植密度和施N时期对不同穗型水稻源库关系的影响 总被引：1，自引：0，他引：1
水稻群体源库特性受品种遗传力控制较小,而受栽培条件的影响较大,所以栽培措施是调节水稻源库关系的一种主要手段。本文通过研究密度和施N时期对穗重型水稻垦稻12和穗数型水稻垦稻17源库关系的影响发现,N肥后移对两个品种分蘖成穗率都有明显的促进作用,不同密度下穗重型水稻垦稻12在D2处理下分蘖成穗率最高,而穗数型水稻垦稻17则在D3处理下表现较好。在对叶面积指数(LAI)的影响上,穗数型品种在生育后期比穗重型品种具有更高的LAI,N肥适当后移有利于增加最大LAI和成熟期LAI,垦稻12和垦稻17LAI最适的密度分别为D2和D3处理。在粒叶比上,穗重型的垦稻12明显高于穗数型的垦稻17,垦稻12在D2密度下,垦稻17在D3密度下,N4处理最有利于二者粒叶比的提高。 相似文献
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R. W. Summers 《Crop Protection》1985,4(4):520-528
A study was carried out on the behaviour of starlings (mainly juveniles) which are pests in cherry orchards where they eat ripening fruit. Observations on 17 radio-tagged starlings during the cherry-picking season showed that most individuals continued to feed in the orchards on consecutive days despite the use of a variety of scarers. Distress calls of starlings played through loudspeakers were effective in that they temporarily scared starlings, but birds returned during the periods when no distress call was played. However, starlings no longer responded to these distress calls after the period between days 7 and 13. Captive starlings could not maintain their weight on a diet of cherries and the maximum daily intake was 25 cherries, amounting to 1·5 times the bird's own weight. The length of time spent in the orchards by radio-tagged birds (on average 2·8 hours) was far longer than the time needed to eat 25 cherries. It is concluded that the present arrangement of scarers was inefficient and that the netting-in of an orchard would be more effective. 相似文献
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To understand the genetic basis of gelatinization temperature (GT), gel textural traits and flour swelling volume, quantitative trait loci (QTL) were mapped for these traits using a doubled haploid (DH) population derived from a cross between indica variety Zai-Ye-Qing 8 (ZYQ8) and japonica variety Jing-Xi 17 (JX17). The results indicated that the starch property parameters were continuously distributed among the DH lines, and some DH lines showed transgressive segregation for all the parameters. A total of 16 QTLs were identified for seven traits. A major QTL, the alk gene on chromosome 6 was significant for the three GT traits, onset temperature (To), peak temperature (Tp), and completion temperature (Tc). This locus could explain 49.4, 38.9, and 28.3% of the total variance, respectively, indicating that GT parameters were substantially controlled by the alk gene which has previously been identified for alkali spreading value (ASV). The additive effects of alk on To,Tp and Tc were from ZYQ8. Another two QTLs on chromosomes 1 and 7 were also identified for the three GT parameters, whose positive effects were contributed from JX17. Another QTL on chromosome 10 with the positive effects coming from ZYQ8 was significant only for Tc. However, the enthalpy (ΔH) of gelatinization was controlled by two minor QTLs on chromosomes 1 and 7. A major QTL, the Wx gene on chromosome 6 was identified for gel hardness and flour swelling volume which explained 58.8 and 36.6% of the total variances, respectively. Another two QTLs were also detected for flour swelling volume, one of which (qSV-7) could explain 21.4% of the total variance. However, gel cohesiveness was controlled by a major QTL located between alk and Wx on chromosome 6. 相似文献
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木薯新品种华南8号的选育 总被引：5，自引：1，他引：5
木薯新品种华南8号(Manihot esculenta Crantz.cv.M.SC8)是由中国热带农业科学院热带作物品种资源研究所通过CIAT从泰国引进的CMR38-120的自然杂交种F1无性系后代中选育而成的。该品种具有良好的丰产性和广泛的适应性,并有很强的抗风能力和出苗率。其鲜薯产量约36.79t/hm2,比现大面积种植的当家品种华南20(5SC205)增产40.90%,其块根干物率和淀粉含量分别为质量分数40.86%和32.69%,分别比SC205高2.70个百分点和2.16个百分点。因此,华南8号是一个高产、优质的饲用和工业应用型木薯新品种。为了保护新品种及便于产权鉴定,对新品种华南8号建立分子指纹。 相似文献
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为明确西藏小麦品种不同高分子量麦谷蛋白亚基(HMW-GS)对小麦品质的作用,对210份小麦品种的HMW-GS组成与蛋白质含量和沉淀值之间的关系进行了研究,结果表明,在Glu-A1位点上,亚基1、null和2*出现的频率依次为50.00%、34.76%和15.24%,各亚基对蛋白质含量和沉淀值的作用均为2*＞1＞null;在Glu-B1位点上,亚基7 8和7 9出现频率分别为45.71%和37.14%,远高于其它亚基出现的频率,各亚基对蛋白质含量的作用为7＞14 15＞17 18＞6＞7 9＞22＞7 8＞6 8,对沉淀值的作用为17 18＞7＞14 15＞7 9＞7 8＞6＞6 8＞22;在Glu-D1位点上,5 10与2 12出现频率分别为52.38%和47.14%,亚基12出现频率较低,各亚基对蛋白质含量的作用为 5 10＞12＞2 12,对沉淀值的作用为5 10＞2 12＞12.HMW-GS所对应的蛋白质含量与沉淀值之间的相关系数为0.6535,达到了显著水平.以蛋白质含量为评价指标,较优的亚基组合有1/17 18/2 12、1/7/5 10、1/17 18/5 10、1/6 8/2 12、null/22/2 12、2*/17 18/5 10.以沉淀值为评价指标,较优的亚基组合有1/14 15/2 12、2*/17 18/5 10、2*/7/5 10.以蛋白质含量与沉淀值相结合为评价指标,本研究中HMW-GS的最优搭配为2*/17 18/5 10,其次为2*/7/5 10.HMW-GS组成类型所对应的蛋白质含量与沉淀值之间的相关系数为0.5571(P＜0.05),达到了显著水平. 相似文献
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为定位大豆蛋白质含量稳定性QTL,从而为培育高蛋白大豆品种提供依据,本研究利用源自美国大豆Charleston和中国品种东农594杂交获得的147个株系组成的重组自交系群体,利用三种生态环境下三年数据估算的Shukla稳定性方差对大豆蛋白含量进行了遗传和QTL分析。结果表明,利用复合区间作图法（CIM）检测大豆蛋白稳定性QTL得到2个QTL,分别为qPRO1-1和qPRO17-1,位于连锁群A1和L上,贡献率分别为4.70%和5.73%,共解释10.43%的表型变异。利用混合区间作图法MIM检测到2对上位性QTL,互作染色体为A1×G和A1×A2,上位效应分别为0.19**和-0.22,贡献率为12.82%和17.42%,共解释30.24%表型变异。本实验分析多个环境下的数据,考虑到了QTL 与环境的互作效应,在三种环境条件下分析QTL,检测到了在不同环境下可以稳定出现的QTL位点。控制大豆蛋白含量的QTL位点,都表现出明显的上位性效应和GE互作效应。其中稳定性较好的QTL和公共图谱上定位的调控大豆蛋白质含量的QTL prot 1-7、cq oil003、oil8-1, prot 17-5、prot 2-1、prot 12-1等在区间上一致。 相似文献
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丰产早熟抗病亚麻新品种天亚8号的选育 总被引：4，自引：0，他引：4
张金 《中国油料作物学报》2005,27(3):18-20
天亚8号是以列诺特为母本、天亚6号为父本进行杂交,经不同生态区穿梭选育而成的丰产早熟抗病油纤兼用型亚麻新品种,具有丰产性好、抗病性强、油分品质较好、早熟、适应性广等特点.甘肃省区试平均产量1 324.95kg/hm2,比对照陇亚8号增产10.2%.全国(华北、西北)胡麻区试平均产量1 729.8kg/hm2,比对照品种陇亚8号增产6.29%.生产示范最高产量3 062.3kg/hm2,比当地对照品种平均增产11.89%.籽实平均含油率39.07%,其中亚油酸含量14.35%,亚麻酸含量52.98%. 相似文献
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选用两个具有抗性差异的玉米自交系B73与Mo17,分别对其根部进行干旱、脱落酸(ABA)、茉莉酸甲酯(MeJA)以及茉莉酸甲酯与乙烯利联合(MeJA/EP)处理,定量检测4个与防御相关的萜类合酶基因An2、ZmTPS6、ZmTPS8以及ZmTPS26的表达情况。结果表明,4个基因在B73与Mo17应对干旱和ABA处理时基因表达差异明显。在Mo17中,干旱胁迫以及ABA处理显著诱导4个基因的表达;在B73中,干旱处理导致An2、ZmTPS6和ZmTPS8基因表达下调,在ABA处理下时,只有ZmTPS6被显著上调;MeJA与MeJA/EP处理在B73与Mo17中都能上调4个基因的表达,但在Mo17中的诱导程度更剧烈。B73与Mo17的根部在响应胁迫时存在显著的萜类代谢差异,可能为其抗性差异原因之一。 相似文献
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水稻抗倒力及相关抗倒伏性状的QTL分析 总被引：4，自引：0，他引：4
以典型的籼粳交（窄叶青8号/京系17）的F1花培加倍单倍体为材料,考查了抗倒力、株围、株高、有效穗数、重心高和地上部生物量等抗倒伏相关性状。利用该群体的分子连锁图谱进行QTL区间作图分析,除地上部生物量外,其他5个性状均检测到了相关的QTL,其中与抗倒力、株围、有效穗数相关的QTL各1个,分别位于第8、8和12染色体上,贡献率分别为18.4%、12.6%和10.6%。与株高相关的QTL 2个,位于第4和第8染色体上,贡献率分别为12.7%和12.5%。与重心高相关的QTL 3个,位于第4、8和10染色体上,贡献率分别为12.5%、14.6%和10.0%。相关分析表明,抗倒力与株围、株高、重心高和地上部生物量均呈极显著正相关。 相似文献
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《Plant Production Science》2013,16(3):260-269
AbstractWe grew 1005 mutated scented japonica rice lines to the seventh steady genetic generation, and treated the seedlings with six true leaves with 300 mM NaCl for three days. Only the salt-tolerant line, SM61, survived. We obtained F1, F2 and F3 populations from the cross between SM61 and a salt-susceptible indica variety, TCS17. After culture with 200 mM NaCl for five days, SM61 and F1 (SM61×TCS17; TCS17×SM61) plants survived (R) while TCS17 plants did not (S). The R to S ratio in 513 F2 plants showed a good fit to the Mendelian 3 : 1 segregation ratio by a Chi-square test indicating that the salt-tolerance of SM61 was governed by a single dominant gene. The mutated salt-tolerance gene explained close to 100% of the total phenotypic variation, and was tightly linked to RM223 (marker) located on chromosome 8, which was different from the results of previous studies investigating the relationship of QTLs with salt tolerance. This is the first report of mapping tightly linked markers of a single dominant mutated salt-tolerance gene. 相似文献
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淀粉加工型马铃薯种质资源的引进与评价 总被引：2，自引：0，他引：2
淀粉产量是淀粉加工企业普遍关心的重要问题。利用当地主栽品种克新13号作为对照品种,对引进的7个马铃薯新品种(系)进行了田间对比试验。试验结果表明:春薯4号、呼H99-9、呼H99-8、中心202的产量高于对照,海伦3号、综合和HL02-2的产量低于对照。从大中薯率来看,仅中心202高于对照。引进的7个品种淀粉含量均高于对照,其中淀粉含量最高的品种是综合,淀粉含量达22.05%,其次是海伦3号,淀粉含量达19.98%。除了HL02-2外,其余品种的淀粉产量均高于对照。从整体评价结果来看,呼H99-9、呼H99-8和海伦3号的淀粉含量及淀粉产量都优于对照品种克新13号,适合在当地推广种植,而中心202可以用作早期淀粉加工。 相似文献
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川凉薯8号是2000年用‘Apat’作母本,‘822-17’(105-16×Schwalbe)作父本,有性杂交获得实生籽,经过各代鉴定筛选而成。该品系2008～2009年在四川省两年区试中平均公顷产量24 075 kg,较‘米拉’增产21.00%;2010年在通江、昭觉、峨边、达州4点进行生产试验,平均公顷产量25 065 kg,比‘米拉’增产16.70%;淀粉17.30%、还原糖0.17%、水分71.9%、粗蛋白2.14%、维生素C 16.8 mg/100 g;抗晚疫病、癌肿病,中抗轻花叶病毒病和卷叶病毒病。2012年5月通过四川省农作物品种审定委员会审定。 相似文献
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纹枯病菌对不同水稻品种叶片中抗病性相关酶活性的影响 总被引：3，自引：0，他引：3
对优质抗纹枯病水稻品种ZH5、较抗纹枯病品种特青、感纹枯病品种Lemont及恢复系泸恢17、多系1号和GB8等水稻材料进行纹枯病菌接种,测定了水稻叶片中与抗病性相关的超氧化物歧化酶 (SOD)、过氧化物酶 (POD) 的活性和丙二醛 (MDA) 的含量。不论纹枯病菌接种与否,ZH5和特青叶片中SOD活性均明显高于Lemont;纹枯病菌接种后,抗性品种ZH5和特青叶片中POD活性升高,感病品种Lemont 叶片中POD活性降低;不论是抗病还是感病的水稻材料,纹枯病菌接种后叶片中MDA含量均有所增加,但ZH5叶片中MDA含量明显低于其他参试材料。 相似文献
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Mapping Quantitative Trait Loci for Palatability of Milled Rice 总被引：1，自引：0，他引：1
TANGShao-qing HuPei-song JIAOGui-ai ZHAIHu-qu WANJian-min 《水稻科学》2005,12(1):19-24
Quantitative trait loci (QTLs) controlling palatability in rice were identified using a set of 98 backcross inbred lines (BILs) population derived from a cross between a japonica variety Nipponbare and an indica variety Kasalath. The palatability scores of the population measured by RQ1/Plus Rice Analyzer, showed a continuous and transgressive segregative distribution with a range from 66 to 92. Four putative QTLs for palatability, qPAL-5, qPAL-7, qPAL-8a and qPAL-8b, were detected on chromosome 5, 7 and 8, and they accounted 7.83, 7.03, 11.58 and 7.19% of the total phenotypic variation, respectively. Three alleles qPAL-5, qPAL-7 and qPAL-8b from Kasalath increased the palatability score, whereas only one Nipponbare allele qPAL-8a increased the score. Eight transgressive lines in palatability were selected to make a comparison between phenotypic and genotypic classes. The result explained the possibility of positive QTLs pyramiding through marker-assisted selection of highly palatable rice. 相似文献