常温种质库贮存高粱种子生活力及籽粒性状相关分析

Correlation Analysis between Seed Viabilities and Grain Traits of Sorghum Accessions in the Crop Genebank

为了解种质资源耐贮性及贮存高粱种子生活力和籽粒性状相关性,对1995年贮存的249份高粱种质发芽率进行了测定,结果表明:经过10年,贮存于短期库的高粱种质有205份发芽率低于50%,占82.3%;发芽率在50%以上的材料有44份,占17.6%,少数种质资源发芽率并没有明显下降,有2份材料发芽率高于90%,高粱种内不同品种之间种子生活力存在明显差异。籽粒发芽率与籽粒壳包被度、着壳率、角质率显著正相关,相关系数分别为0.2820,0.2970,0.1304,发芽率与籽粒千粒重不显著负相关。

The objective of this study was to investigate the storability and correlation between seed viability and grain traits of sorghum accessions stored in the normal temperature crop genebank. Seed viabilities of 249 sorghum acces- sions stored for 10 years were tested. The results showed that after 10 years storage the germination percentage of 205 ac- cessions, accounting for 82.3 % of the total, declined to below 50 % and the germination percentage of 44 accessions, ac- counting for 17.6% of the total, were above 50%. The germination percentage of a few accessions did not significantly declined, 2 accessions above 90 %. Grain viability of accessions showed significant difference. Seed germination percentage was significantly positively relation with grain covering, glume seed percentage and endosperm corneous, and relativity co- efficient was 0.282 0,0. 297 0,0. 130 4, respectively; it was indistinetively negatively relation with the trait thousandseed weight.