杂种f 1花药不开裂的原因随其所含的杂合花粉不育基因座位种类和数目不同而异。
The main causes resulting in poor anther dehiscence in hybrid F1 were different with the kind and the number of heterozygous pollen sterility loci.
但因光a纯合态的低衣分，其亲本繁殖和杂交制种时皮棉产量降低，故光a不育系在杂种优势中的利用有优势又有劣势。
However, Guang a has disadvantages as well as advantages in the utilization of heterosis because of its low lint percentage in parent propagation and hybrid seed production.
本文还讨论了新不育系的遗传组成及在油菜杂种优势利用和机理研究方面的重要作用。
The genetic composition of the new sterility and its mechanism and the prospect of its utilization are discussed.
因此利用基因工程手段克隆育性相关的基因，并加以利用创造理想的棉花雄性不育系类型，可能成为促进杂种优势利用，提高棉花产量和品质的新途径。
Therefore, cloning male fertility-related genes and used to create the ideal male sterile line is a new way of improving the cotton yield and quality by cotton heterosis application.
小麦作为世界主要的粮食作物，对其杂种优势利用的研究，特别是雄性不育机理的研究，一直是众多杂交小麦育种者设法攻克的难关。
Wheat as the main food crop, studying its utilization of heterosis and male sterility is the matter that many breeders have been trying to overcome.
应用化学杂交剂(CHA)诱导雄性不育是小麦杂种优势利用的重要途径之一。
Male sterility of wheat inducing by Chemical hybridization agents (CHA) is one of the main ways to produce hybrid wheat seed.
以中国高粱胞质雄性不育系“吉农105”为研究试材，用9个常用高粱恢复系与之杂交，并对其杂种后代F 1、F2及BC1的育性分离比例进行了统计调查。
The separation of fertility in F1, F2 and BC1 from crosses between cytoplasmic male sterile line of Chinese sorghum "Jinong 105" and 9 restoring lines of sorghum were statistically analysed.
与细胞质雄性不育类型相比，隐性细胞核雄性不育具有独特的优点，在作物杂种优势的利用中具有一定应用潜力。
Comparing with cytoplasmic male sterility, recessive genie male sterility has application potentiality in heterosis utilization in crops due to its special characteristics.
雄性不育是油菜杂种优势利用的一条重要途径，在杂种优势利用中亲本选配是配制强优势组合、有效利用油菜杂种优势的关键环节。
Male sterility is an important way of utilizing rapeseed heterosis. In the breeding of hybrids, how to choose parents is a key step to gain strong heterosis and efficiently use heterosis.
雄性不育是油菜杂种优势利用的一条重要途径，在杂种优势利用中亲本选配是配制强优势组合、有效利用油菜杂种优势的关键环节。
Male sterility is an important way of utilizing rapeseed heterosis. In the breeding of hybrids, how to choose parents is a key step to gain strong heterosis and efficiently use heterosis.
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