海岛棉铃形与铃重纤维品质关系的研究

A STUDY OF THE RELATIONS BETWEEN BOLL FORM AND BOLL WEIGHT AND FIBRE QUALITY OF SEA-ISLAND COTTON

分析了72份零式果枝型海岛棉品种的铃形与铃重及品质间的对应分布关系及其遗传相关关系。结果表明,长铃或长粗比值大的品种衣分低,纤维长、比强度高;铃较粗的品种铃重大、衣分高、纤维短、比强度低、马克隆值大;大铃(铃较长)品种铃重大,比强度高、纤维长;衣分与棉铃大小似乎无关。以铃长和铃粗两个性状为选择依据,分别连续定向选择,有希望选育出高比强,长纤维的特异种质和高衣分的特异种质。在大铃的基础上、兼顾铃长和铃粗,有可能选育出高产优质的生产型品种。

Presented in this paper is an analysis of the corresponding distribution relations and genetic correlation between boll form and boll weight and fibre quality based on 72 samples of non-fruit-branch sea-island cotton varieties. The results indicated that boll weight and fibre quality are related to boll form in the following ways: long-boiled variety has low lint percentage, long fibre, and high yarn tenacity; thick-boiled variety has high lint weight and lint percentage, short fibre, low lint tenacity, and high Micronaire; big-boiled (longer) variety has high lint weight, and lint tenacity. Ling percentage didn't seem to be related to the size of boll.Continous directive breeding can be conducted on the basis of the characters of boll length and thickness. Hopefully, two specific varieties will be obtained with one having high yarn tenacity, long fibre, and the other having high lint percentage. A high-yield productive variety can also be obtained from long bolls, with boll length and thickness considered at the same time. It is more difficult to breed productive variety than specific through directive breeding.