PJB-2017-18
ANALYSIS OF THE A GENOME GENETIC DIVERSITY AMONG BRASSICA NAPUS, B. RAPA AND B. JUNCEA ACCESSIONS USING SPECIFIC SIMPLE SEQUENCE REPEAT MARKERS
HONGYUN TIAN1,†, JINQIANG YAN1,†, SIRAJ AHMED CHANNA1,2,†, RUIJIE ZHANG1 ,YUAN GUO1AND SHENGWU HU1★
Abstract
This investigation was aimed at evaluating the genetic diversity of 127 accessions among Brassica napus, B. rapa, and B. juncea by using 15 pairs of the A genome specific simple sequence repeat primers. These 127 accessions could be clearly separated into three groups by cluster analysis, principal component analysis, and population structure analysis separately, and the results analyzed by the three methods were very similar. Group I comprised of mainly B. napus accessions and the most of B. juncea accessions formed Group II, Group III included nearly all of the B. rapa accessions. The result showed that 36.86% of the variance was due to significant differences among populations of species, indicated that abundance genetic diversity existed among the A genome of B. napus, B. rapa, and B. juncea accessions. B. napus, B. rapa, and B. juncea have the abundant genetic diversity in the A genome, and some elite genes can be used to broaden the genetic base of them, especially for B. napus, in future rapeseed breeding program.
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