Oil and protein quality of groundnut mutants

Variability in oil quality was observed in four groundnut mutants (TG-1, TG-3, TG-14, TG-16) induced by -irradiation. The fatty acid composition of the mutants differed from their parent Spanish Improved. All the mutants had lower linoleic and higher oleic acid than the parent Spanish Improved. TG-3 and TG-14 had substantially higher linoleic acid and lower oleic acid as compared with TG-1 and TG-16. Other fatty acids also showed minor variation amongst mutants and Spanish Improved. The ratio of oleic to linoleic acid, which is an index of oil stability, was 2.7 and 3.3 fold respectively in TG-16 and TG-1 as compared with Spanish Improved.Protein percent in TG-1, TG-14 and TG-16 was higher than in Spanish Improved. Amino acid analysis of protein from mutants indicated decreases in methionine and cystine and an increase in tryptophan as compared with Spanish Improved. Other amino acids did not show any major variation between the mutants and Spanish Improved. In all varieties except TG-16, lysine was the first limiting amino acid; threonine was second limiting in all mutants. The essential amino acid content per kernel was higher in mutants than in Spanish Improved.     

早熟高产抗虫棉冀优768的选育

冀优768是利用携带有外源抗棉铃虫Bt基因的326作母本,以具有海岛棉、陆地棉、野生棉遗传基础的322系作父本,其后代在黄枯萎混生重病地、不防治棉铃虫的高压胁迫下,经过连续定向选择育成。其突出表现早熟、抗棉铃虫、高产、抗病。2003-2004年在河北省冀东棉花品种区域试验中,霜前皮棉较对照品种新棉33B、DP99B分别增产40.6%和39.2%;2004年生产试验,籽棉、皮棉和霜前皮棉产量分别较对照DP99B增产14.1%,29.0%和38.5%,籽皮棉产量均居第1位;纤维长度29.7 mm,整齐度84.9%,比强度28.7 cN/tex,伸长率6.4%,麦克隆值5.0。2006年4月通过河北省农作物品种审定委员会审定(审定编号:冀审棉2006017),准予在冀东及同一生态类型区推广。     

优质大穗型糯玉米杂交种黔糯768的栽培技术

黔糯768在栽培上除要求隔离区种植和因地制宜,分期播种,实现周年供应外,其它栽培技术与普通玉米相同。根据糯玉米的生理特性和各地的种植经验,黔糯768大田生产宜选择交通方便、肥力条件较好的地块种植。种植密度在2800~3000株/667m2。     

黔糯768在偏坡乡的适应性

黔糯768是贵州省农业科学院旱粮研究所选育的高产优质糯玉米新品种,该品种柔嫩性好,味甜,食味佳。为了尽快推广该品种,探讨该品种的适应性,于2007年引进乌当区偏坡乡,与当地主推品种筑糯2号进行比较试验,黔糯768平均产鲜果穗642.83 kg/667 m2,比筑糯2号增产7.66%;平均产鲜籽粒572.08 kg/667 m2,比筑糯2号增产10.81%,为偏坡乡糯玉米产业的发展提供了新的种源。