EARLY GENERATION SELECTION FOR AGRONOMIC CHARACTERS IN A POTATO BREEDING PROGRAM

被引:28
作者
GOPAL, J [1 ]
GAUR, PC [1 ]
RANA, MS [1 ]
机构
[1] CENT POTATO RES INST,MODIPURAM,INDIA
关键词
POTATO BREEDING; EARLY GENERATION SELECTION; SELECTION PROCEDURE; SOLANUM-TUBEROSUM;
D O I
10.1007/BF00224173
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
A random sample of seedlings representing high, medium and poor vigour was studied for tuber colour, tuber shape, eye depth, tuber cracking, tuber yield per plant, average tuber weight and number of tubers per plant in four successive generations (F1, F1C1, F1C2, and F1C3). Based on the performance of vigour groups in various generations and inter-generation correlation coefficients, we propose a procedure for the elimination of unproductive genotypes early in the breeding programme. The data indicates that seedlings of poor vigour can be discarded at the seedling stage prior to transplantation in the field. The rejection of clones on the basis of tuber colour, tuber shape, eye depth and tuber cracking can also be initiated at the seedling stage. For tuber yield and average tuber weight a negative selection (rejection of poor phenotypes) is suggested from the first clonal generation and for number of tubers, from second clonal generation, until statistically sound replicated trials can be conducted for carrying out positive selection.
引用
收藏
页码:709 / 713
页数:5
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