細胞質雄不稔性稉稻之稔性恢復系選育

曾東海; T.H. Tseng

doi:10.29951/JARC.198912.0001

細胞質雄不稔性稉稻之稔性恢復系選育

Other Title

Breeding for Cytoplasmic Male Sterility Restorer Lines in Japonica Rice

Journal

中華農業研究

Journal Volume

38

Journal Issue

4

Pages

385-394

Date Issued

1989-12-01

Date

1989-12-01

Author(s)

曾東海

T.H. Tseng

DOI

10.29951/JARC.198912.0001

URI

https://scholars.tari.gov.tw/handle/123456789/12838

Abstract

以稉型細胞質雄不稔系臺農67（WA）A及臺農67（R）A為母本，與臺農秈育91、169、175、176、178等秈型恢復系雜交，探討恢復基因在其自交及同交後代的表現，以期育成稉型細胞質雄不稔性的稔性恢復系，供稉稻雜種品種育種之需。試驗結果：稉稻不稔系與秈型恢復系的雜種F1稔實率皆低於50％，其F2的稔實率分佈偏向低稔實，但仍有6～23％之個體稔實率超過70％。自F2選拔高稔實單株，其F3有12～46％之個體稔實率超過70％，顯示選拔具有某種程度的效果。選高稔實個體，再與稉稻臺農67號回交，其雜種Fl稔實率，隨回交次數而更偏向低稔實。從（F2）BC1F1選拔高稔實單株之（F2）BC1F2族羣，有19～53％之個體稔實率超過70％，顯示其選拔效果較比從F2族羣選拔之效果大。臺農67（R）A／臺農秈育169組合之各世代，皆有較高比例之高稔實個體，顯示其恢復基因之作用較強。正常花粉率與稔實率相關極顯著。從（F）BC2F1及（F2）BC1F2世代選拔高稔實單株，以系譜法繼續選育中。 Japonica cytoplasmic male sterile (CMS) lines, Tainung 67(WA)A and Tainung 67(R)A were used as maternal parents for crossing with Indica restorer lines Tainung Sen Yu 91, 169, 175, 176 and 178 to investigate the performances of restorer genes in the selfing and backcrossing offsprings. The purpose of this experiment was to develop Japonica CMS restorer lines for breeding Japonica hybrid rice varieties. Experimental results indicatedethat fertility rates of hybrid F1 from crosses between Japonica CMS and Indica restorer lines were lower than 50%. Six F2 populations showed a tendency of lower fertility rate. However, 6-23% of plants from the F2 populations still possessed fertifity rate higher than 70%. Selection from such plants produced 12-46% of individuals in F3 generations showing fertility rate above 70%. The results indicated that the selection in improving the fertility rate of Japonica CMS restorer lines was efficient to at least some extent. Selected high fertility plants from F2 populations backcrossed to Tainung 67 showed a gradual decrease in feritilty rate when the backcrossing number increased. Selection of individuals from (F2)BC1F1 with high fertility rate were able to produce 19-53% of plants possessing fertility rate over 70%. In other words, selec-toin efficiency from backcross progenies was higher than that from the F2 populations. Higher potency of restorer gene in Tainung Sen Yu 169 as the parent resulted in higher percentage of offsprings carrying high fertility rate, especially in the cross of Tainung 67(R)A × Tainung Sen Yu 169. Experimental results also showed a positive correlation between percentage of functional pollen and fertility rate. Selections from (F2)BC2F1 and(F2)BC1F2 populations are currently subjected to further tests by pedigree method in this laboratory.

Publisher

農業試驗所

Type

journal article

File(s)

Name

38-4-1.pdf

Size

1.22 MB

Format

Adobe PDF

Checksum

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