花生SSR标记与农艺性状的相关性

Correlation between SSR Markers and Agronomic Traits in Peanut(Arachis hypogaea L.)

以农家品种四粒红和冀农黑3号构建的包含有251个家系的重组自交系（RIL）群体为材料，在河北保定市和邯郸大名县两地进行表型鉴定，利用Pearson’S相关和逐步多元回归分析了花生农艺性状之间及其与标记的相关性。结果表明，多数农艺性状间存在显著或极显著相关，其中相关性最高的为单株生产力和单株仁重（r=0．970），其次是主茎高和第一侧枝长（r=0．918）；77个SSR标记与18个农艺性状显著相关，每个性状相关标记数在2～16之间；14个SSR标记与13个农艺性状关联，解释的表型变异为5．2％～11．5％。以上结果为花生常规育种和分子标记辅助选择奠定了基础。

A recombinant inbred line （RIL） population including 251 lines, derived from the cross between Silihong and Jinonghei 3 was used to study the correlations between SSR markers and agronomic traits. The phenotypese were evaluated in two locations of Baoding and Handan, Hebei Province. Pearson＇s correlation and stepwise multiple linear regression analysis were conducted based on SSR and phenotyping data. The results showed that there were significant correlations among 18 agronomic traits, with the higher correlations between pod weight per plant and seed weight per plant （r = 0.970）, as well as the height of main stem and length of first branches （r = 0.918）. There existed significant correlation between SSR marker and agronomic trait with a average of 2-6 markers correlated with each agronomic trait. Fourteen SSR markers were associated with 13 agronomic traits with explanined phenotypic variances of 5.2%-11.5%. All these laid a solid foundation for peanut conventional breeding and molecular marker-assisted breeding programs.