電大園藝植物育種學(xué)試題庫(kù)參考答案小抄-wenkub.com
2025-05-30 05:04 本頁面
【正文】 an. Lou held a joint interview with 27 media, including China Daily, the first in a series of interviews entitled Chinese Media Along the Silk Road. The interviews will be in Shaanxi and Gansu provinces and the Xinjiang Uygur autonomous region, as well as Kazakhstan, Uzbekistan and Turkey. The media group held the first interview on Wednesday morning in Xi39。s ancient indigenous religion, while Du jiang yan is considered to be the oldest functioning watercontrol project in the world. Chengdu ranked third in tourist facilities, management and services among 60 Chinese cities in a customer satisfaction survey released last year. But, Li added that efforts are still needed to develop more tourism products, improve English services and provide accurate translation of traffic signs and scenic billboards. Zhao Yun, chairwoman of British Chamber of C ommerce Southwest China, told China Daily that his colleagues found the policy very convenient. A British client once flew here and stayed for just one day to check her ordered goods, she said. Zhao was born in Shanxi province, but she has lived in Chengdu for more than 10 years. My life was like a running race moving from place to place. I also lived in Beijing and Shanghai before, she said. But Chengdu is a place that you never want to leave once settling down. It is now my second hometown, she said. If the environment is further improved, the city will attract more people to visit and live, with the 72 hour visafree policy and pelling conditions in transportation, culture, climate and cuisine, he said. Foreigners also gave positive feedback on the policy. A spokesman from Dell Inc said the pany has a global hub of operation in Chengdu, so the threeday visa has an immediate and positive influence on the pany39。 1常規(guī)有性雜交育種中親本選配的原則是什么？ 答： 1）父母本性狀互補(bǔ)； 2）選用不同生態(tài)類型的親本配組； 3）以具有較多優(yōu)良性狀的親本作父本； 4）親本之一的性狀應(yīng)符合育種目標(biāo)； 5）用一般配合力高的親本配組； 6）注意父母本的開花期和雌蕊的育性 Visafree policy brings Chengdu biz, tourism boost. Making national headlines several times, Chengdu39。 1試述選種程序的主要內(nèi)容與特點(diǎn) 答： 1）原始材料圃，設(shè)置年限一二年； 2）選種圃，其定植要設(shè)對(duì)照區(qū)、保護(hù)行及兩次重復(fù)； 3）品比預(yù)備實(shí)驗(yàn)圃，設(shè)置年限一般為一年； 4）品種比較試驗(yàn)圃，設(shè)置三次以上重復(fù)，設(shè)置年限一般為 2～ 3年； 5）品種區(qū)域試驗(yàn)及生產(chǎn)試驗(yàn)，設(shè)置年限為 2～ 3年。 種子生產(chǎn)成本低 缺點(diǎn) 穩(wěn)定性差，種子產(chǎn)量低，生產(chǎn)成本高。 適合異花授粉作物的選擇方法有哪些？ 答：?jiǎn)沃辏旌线x擇 法、母系選擇法、親系選擇法、剩余種子法、集團(tuán)選擇法。 馴化引種是植物本身的適應(yīng)性很窄，或引入地的生態(tài)條件與原產(chǎn)地的差異太大，植物生長(zhǎng)不正常直至死亡，但是，經(jīng)過精細(xì)的栽培管理，或結(jié)合雜交、誘變、選擇等改良植物的措施，逐步改變遺傳性以適應(yīng)新的環(huán)境，使引進(jìn)的植物正常生長(zhǎng)。 《園藝植物育種學(xué)》試題庫(kù)參考答案 三、簡(jiǎn)答題 園藝植物育種目標(biāo)有哪些？ 答：高產(chǎn)穩(wěn)產(chǎn)；品質(zhì)優(yōu)良；適應(yīng)性強(qiáng)；抗病蟲和除草劑；不同成熟期。 頂交法方法簡(jiǎn)單易行，但不能區(qū)分一般配合力和特殊配合力。 單子代法適 用于自花授粉作物，方法簡(jiǎn)單：對(duì) F5 或 F6 各株系的歷史和親緣關(guān)系無法考證， F2 群體較小時(shí)，育種目標(biāo)所期望的基因型可能不出現(xiàn)。 單子傳代法適用于自花授粉作物，方 法簡(jiǎn)單；對(duì)
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