早熟、高配、抗逆玉米自交系“自改—1”的选育

THE SELECTIVE BREEDING CULTIVATION OF MAIZE ZI—GAI-1, A SELF-BRED LINE CHARACTERIZED BY EARLY- MATURITY, STRONG COMBINING ABILITY AND ANTI- ADVERSE CONDITION

“自改—1”玉米自交系是由“330×oh43HtHt—早”组合中经多代选株自交而成。“自改—1”自交系既保持了“330”自交系主要优良性状,又克服了“330”的缺点,并提高了抗病能力、缩短了生育期。是一个自身产量高、配合力好、早熟、抗病、抗倒、抗旱性强、农艺性状优良的理想自交系。“自改—1”玉米自交系具有较高的配合力。“自改—1×黄早四”杂交种(原名廊玉2号),已被河北省农作物品种审定委员会审定,定名为“冀单15号”。“8112×自改—1”、“1984×自改—1”参加了省区域试验。“自改—1×掖107"、“自改—1×23”等组合在多点试验评比中表现突出。这些组合在生产上具有较高的利用价值。

'Zi Gai-1 'maize is a self-bred line cultivated from selected plants in a series of many generations of '330×OH 43HtHt-Zao' combination. While getting rid of the weak points of '330' selfbred line. this new breed had developed its main strong properties, especially resulting in the improvement of resisting diseases and shortened growth period duration. So it is an ideal self-bred line with fine agronomic characters such as high-yielding, high-combination, early-maturity and strong abilities of resisting diseases, falling-over and drought. 'Zi-Gai-1' maize self-bred line is of comparatively high combining abilities, with which and another breed Huang Zao-4 a new crossbred variety was made into being, entitled as 'Ji Dan 15' by the concerned authorities of Hebei Province. '8112×Zi Gai-1', and '1984×Zi Gai-1' groups have been put into growing experiments in regions of Hebei Province. 'Zi Gai-1 Ye 107', 'Zi Gai-1×2379' and other combinations were acknowledged with prominent properties after experimental comparisons. These combinations are of comparatively high practical value in production.