查詢結果分析
來源資料
相關文獻
- 水稻雜種弱勢基因Hwc-1,Hwc-2之表現及其利用之研究(1)--Hwc-1,Hwc-2基因對農藝性狀之影響及臺灣水稻品種之基因型探討
- Effect of Fertilizer, Soil Type, Growth Season on Methane Production and Emission in the Paddy Soils of Taiwan
- 水稻於良種繁殖制度下之遺傳變異
- 臺灣稻作品種的演化過程及分布趨勢
- Historical Review of Semidwarf Rices and Breeding of a New Plant Type for Sustainable Agriculture
- 水稻穀粒比重之研究
- 水稻新品種臺南11號之育成
- 有色水稻中花青素的種類及其功能探討
- 應用稉秈稻雜交改進水稻之抗稻熱病及白枯病特性
- 臺灣秈稻與稉稻之特性研究(1)--1960年以前之栽培品種
頁籤選單縮合
題名 | 水稻雜種弱勢基因Hwc-1,Hwc-2之表現及其利用之研究(1)--Hwc-1,Hwc-2基因對農藝性狀之影響及臺灣水稻品種之基因型探討=Studies on the Influence and Application of the Hybrid Weakness Complementary Genes: Hwc-1 and Hwc-2 in Rice Oryza sativa I. The Influence of Hwc-1 and Hwc-2 Genes on Agronomic Traits and Genotypic Investigation of Rice Cultivars in Taiwan |
---|---|
作者 | 曾東海; 王強生; Tseng, Tung-hai; Wang, Chang-sheng; |
期刊 | 中華農業研究 |
出版日期 | 20011200 |
卷期 | 50:4 2001.12[民90.12] |
頁次 | 頁10-22 |
分類號 | 434.111 |
語文 | chi |
關鍵詞 | 水稻; 雜種弱勢; 互補基因; 秈稻; 稉稻; 花粉污染; 天然雜交; 有色米; Rice; Hybrid weakness; Complementary genes; Indica; Japonica; Pollen contamination; Natural pollination; Colored rice; |
中文摘要 | 水稻為自交作物,但栽培種仍有0~6%的天然雜交率,為預防花粉污染,黑糯稻等有色品種,被列為不鼓勵、不輔導的品種。雜種優勢廣泛地被研究與利用,而雜種弱勢之研究雖偶可見,但鮮有其利用之報告。水稻雜種弱勢係受一組互補基因Hwc-1與Hwc-2所控制,當此互補基因皆為顯性時,植株表現生育弱勢。本試驗探討Hwc-1,Hwc-2基因對農藝性狀之影響及臺灣水稻品種之基因型,當F₁具Hwc-1,Hwc-2基因型時,其苗高及株高呈現生長弱勢,穗數多只1穗,平均穗長約10.6cm;產量構成要素中穗重、穗數、一穗穎花數及單株穀重亦顯現雜種弱勢,但千粒重及稔實率之差異較小。調查雜種弱勢之F₂苗高,分析其生育弱勢與正常株之分離比,符合受一組互補基因控制之9:7分離比。一般水稻品種之基因型為Hwc-1,hwc-2,或hwc-1,hwc2,而Jamaica則為hwc-1,Hwc-2,以107個臺灣育成及4個引進之稉型與29個秈型水稻,共140個品種(系)與Jamaica進行檢交,結果有103組稉稻(佔92.79%)及4組秈稻(佔13.79%)之F₁呈現雜種弱勢,顯示,就Hwc-1基因而言,臺灣及大部分稉稻為顯性而秈稻多為隱性。臺灣水稻栽培約90%為稉稻,若能育成具Hwc-2基因之黑糯品種,應可降低花粉污染問題,黑糯之栽培將可在稉稻栽培區列入輔導,提高農民栽培水稻之收益與意願。 |
英文摘要 | As a self-pollinated crop, 0-6 % natural pollination rate were still observed in the cultivated rice, Oryza sativa. To prevent the pollen contamination, the colored rice such as red and black waxy rice varieties were neither encouraged nor introduced to the farmers. The hybrid vigor has been studied and utilized in rice for a long time nontheless little was known on the hybrid weakness. It was reported that in rice the hybrid weakness is controlled by a set of complementary genes: Hwc-1 and Hwc-2. In this report, we study the influence of the Hwc-1, Hwc-2 genes on the agronomic traits of the F₁ and investigate the genotype of rice cultivated in Taiwan. When the F₁ plants contain both Hwc-1 and Hwc-2 genes they present significant hybrid growth weakness on the seedling and plant height. At maturity, most of F₁ hybrids of Jamaica have only one panicle with an average length at 10.6cm; the yield components: panicle weight, panicle number, spikelet number per panicle, and grain weight per plant also showed hybrid weakness however 1,000 grain weight and seed-set rate were not influenced. The F₂ seedlings height segregated as 9 (growth weakness): 7 (normal) indicated that the hybrid weakness was controlled by a set of complementary genes. In general, rice varieties have either Hwc-1, hwc-2 or hwc-1, hwc-2 genotypes however the Jamaica variety contains hwc-1, Hwc-2 genotype. To investigate the genotype of rice cultivated in Taiwan, 140 test crosses were made by crossing Jamaica with 111 Japonica (Ken-rice) and 29 Indica (Sen-rice) varieties (lines). The results showed that 103 (92.79%) crosses of Ken-rice and 4 (13.79%) crosses of Sen-rice showed F₁ hybrid weakness indicating that the dominant Hwc-1 gene exists in most of the Ken-rice however, most Sen-rice contain the recessive hwc-1 genotype. More than 90% rice cultivated in Taiwan are Ken-varieties therefore, if the Hwc-2 gene of Jamaica were introduced to the colored rice varieties that will be able to eliminate the pollen contamination from colored-rice by the expression of hybrid weakness, and hence increase the farmers' willingness and earning of rice cultivation. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。